CN108014817B - catalyst for synthesizing 1, 4-diacetyloxy butane from butadiene - Google Patents

catalyst for synthesizing 1, 4-diacetyloxy butane from butadiene Download PDF

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CN108014817B
CN108014817B CN201610978492.0A CN201610978492A CN108014817B CN 108014817 B CN108014817 B CN 108014817B CN 201610978492 A CN201610978492 A CN 201610978492A CN 108014817 B CN108014817 B CN 108014817B
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catalyst
diacetoxybutane
catalyst precursor
reaction
activated carbon
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CN108014817A (en
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查晓钟
杨运信
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Sinopec Shanghai Research Institute of Petrochemical Technology
China Petrochemical Corp
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Sinopec Shanghai Research Institute of Petrochemical Technology
China Petrochemical Corp
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    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
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    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
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    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
    • B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/8973—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony or bismuth
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C67/00—Preparation of carboxylic acid esters
    • C07C67/28—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group
    • C07C67/283—Preparation of carboxylic acid esters by modifying the hydroxylic moiety of the ester, such modification not being an introduction of an ester group by hydrogenation of unsaturated carbon-to-carbon bonds

Abstract

the invention relates to a catalyst in a process of synthesizing 1, 4-diacetoxybutane from butadiene, which mainly solves the problems of low yield and low selectivity of 1, 4-diacetoxybutane in the prior art, and adopts the catalyst in the process of synthesizing 1, 4-diacetoxybutane from butadiene; the technical scheme comprises a carrier and an active component, wherein the carrier is active carbon, the active component comprises a Pt element and a cocatalyst element, and the cocatalyst element comprises at least one metal element selected from iron-series metals and at least one metal element selected from VA-group metals, so that the technical problem is better solved, and the method can be used in the industrial production of 1, 4-diacetoxybutane.

Description

Catalyst for synthesizing 1, 4-diacetyloxy butane from butadiene
Technical Field
The invention relates to a catalyst for a process for synthesizing 1, 4-diacetoxybutane from butadiene.
Background
1,4-butanediol (1,4-BDO) is an important organic and fine chemical raw material and is widely applied to the fields of medicine, chemical industry, textile, papermaking, automobile, daily chemical industry and the like. It can derive a series of fine chemical products with high added value. For example, Tetrahydrofuran (THF), polybutylene terephthalate (PBT), gamma-butyrolactone (GBL) and polyurethane resins (PU Resin) can be produced from 1,4-BDO, and have received extensive attention from research institutes, particularly as a basic raw material for the production of PBT engineering plastics and PBT fibers.
2The preparation method of the 1,4-butanediol mainly comprises the steps of taking acetylene and formaldehyde as raw materials, using methanol copper as a catalyst to generate butynediol, using the butynediol to obtain the 1,4-BDO through two-stage hydrogenation to obtain the 1,4-BDO, mainly comprising a BASF company, a DuPont company and an improved Reppe method, wherein the method mainly comprises a BASF company, a Reppe method developed by the U.S. and a California-Merrichtung method, a cis-Butylene-O method developed by the U.S. and a modified Reppe method, a cis-Butylene-O method developed by the U.S. and a cis-Butylene-O method developed by the BASF company as main processes, and a hydro-Butylene-O method developed by a Ni-Re catalyst, a cis-Butylene-O method developed by a 35-O method, a hydro-O method developed by a hydro-O method, a hydro-O method developed by a hydro-O method, a hydro-O method developed by a hydro-O method, a hydro-.
As is well known, the butadiene acetoxylation method is a three-step process, namely firstly, butadiene is subjected to acetylation reaction with acetic acid and oxygen to generate 1, 4-diacetoxybutene and a byproduct of 3, 4-diacetoxybutene; then the 1, 4-diacetoxybutene is catalyzed and hydrogenated to generate the 1, 4-diene acetoxy butane, and finally hydrolysis reaction is carried out to obtain the 1, 4-BDO. In a 1, 4-butadiene to 1,4-butanediol process route in which 1, 4-diacetoxybutene is catalytically hydrogenated to 1, 4-diene acetoxybutane as one of the steps, the yield and selectivity of the hydrogenated product directly affects the yield and selectivity of 1,4-butanediol relative to 1, 4-butadiene.
U.S. Pat. No. 4032458(production of 1,4-butane diol) teaches the production of 1,4-butanediol using furan in the presence of a catalyst under certain conditions of temperature and pressure. Patent CN94108094.3 (process for preparing 1,4-butanediol) describes the preparation of 1,4-butanediol by gas phase catalytic hydrogenation reaction using maleic anhydride as raw material in the presence of a specifically designed catalyst. Patent CN104326871A (a preparation method of butanediol) describes that 2-butene with a content of more than 99% is mixed with acetic acid, nitrogen, oxygen and water vapor at a high temperature and then introduced into a fixed bed by using a fixed bed catalytic technology, and 1,4-butanediol is prepared under the conditions of a catalyst, a certain temperature and a certain pressure, and the like. However, the methods have the problems of low yield and low selectivity of the 1,4-BDO in the process of preparing the 1, 4-BDO.
Disclosure of Invention
One of the technical problems to be solved by the invention is the problem that the yield and the selectivity of 1, 4-diacetoxybutane are low, and the invention provides a novel catalyst for the process of synthesizing 1, 4-diacetoxybutane from butadiene, wherein the catalyst has the characteristics of high yield and high selectivity of 1, 4-diacetoxybutane.
the second technical problem to be solved by the invention is the preparation method of the catalyst.
the invention also provides a method for synthesizing 1, 4-diacetoxybutane by using the catalyst.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: catalyst for synthesizing 1, 4-diacetoxybutane from butadiene; the catalyst comprises a carrier and an active component, wherein the carrier is activated carbon, the active component comprises Pt element and a promoter element, and the promoter element comprises at least one metal element selected from iron series metals and at least one metal element selected from VA group metals.
in the technical scheme, the activated carbon is preferably at least one of coal columnar carbon, coconut shell activated carbon, apricot shell activated carbon and bamboo activated carbon.
in the technical scheme, the specific surface area of the activated carbon is preferably 1000-1500 cm2/g, and the adsorption pore volume is preferably 0.60-1.00 cm 3/g.
in the above technical solution, the iron-based metal in the catalyst is selected from at least one of Fe, Co and Ni. Further comprising both Co and Ni. Co and Ni have a synergistic effect in increasing the yield of 1, 4-diacetoxybutane and the selectivity of 1, 4-diacetoxybutane.
in the above technical solution, the group VA metal in the catalyst is preferably at least one selected from As, Sb and Bi, and more preferably includes both Sb and Bi. Sb and Bi have a synergistic effect in increasing the yield of 1, 4-diacetoxybutane and the selectivity of 1, 4-diacetoxybutane.
in the above technical solution, the promoter element preferably includes at least one selected from iron group metal elements and at least one selected from group VA metal elements, and at this time, there is a synergistic effect between the metal elements in the iron group and the metal elements in the group VA metal elements in the aspect of improving the yield of 1, 4-diacetoxybutane and the selectivity of 1, 4-diacetoxybutane. By way of non-limiting example, such as but not limited to, nickel in conjunction with antimony, nickel in conjunction with bismuth, and the like.
In the technical scheme, the content of Pt in the catalyst is preferably 1.00-8.00 g/L, and more preferably 1.50-5.00 g/L.
In the technical scheme, the content of the promoter element in the catalyst is preferably 0.50-10.00 g/L, and more preferably 1.00-6.00 g/L.
To solve the second technical problem, the technical solution of the present invention is as follows:
The method for preparing a catalyst according to any of the preceding technical solutions, comprising the steps of:
Mixing a solution containing platinum elements with a carrier according to the composition of a catalyst to obtain a catalyst precursor I;
Ageing the catalyst precursor I to obtain a catalyst precursor II;
reducing the combined platinum element in the catalyst precursor II into simple substance platinum to obtain a catalyst precursor III;
Fourthly, washing and drying to obtain a catalyst precursor IV;
loading the solution containing promoter element on the catalyst precursor IV by adopting an immersion method according to the composition of the catalyst, and drying to obtain the catalyst.
In the above-mentioned embodiments, as a non-limiting example, specific compounds corresponding to the platinum element in the step (i) are preferably at least one selected from the group consisting of platinum acetate, platinum chloride, ammonium chloroplatinite, dinitrosoplatinum, chloroplatinic acid, and tetraammineplatinum; more preferably ammonium platinochloride.
In the above technical solution, as a non-limiting example, the specific compound corresponding to the iron-based metal element in the step (v) is preferably at least one selected from ferrous acetate, ferrocene, ferric chloride, ferric sulfate, ferrous nitrate, cobalt carbonyl, cobalt acetate, cobalt chloride, cobalt nitrate, nickel carbonyl, nickel acetate, nickel nitrate, nickel sulfate and nickel chloride; more preferably acetates of iron-based metal elements; most preferably at least one selected from the group consisting of cobalt acetate and nickel acetate.
In the above technical solution, as a non-limiting example, when the promoter element in the fifth step includes a group VA metal element, the specific compound corresponding to the group VA metal element is preferably at least one selected from bismuth subcarbonate, bismuth subnitrate, ammonium bismuth citrate, bismuth sulfate, bismuth acetate, bismuth nitrate, bismuth chloride, bismuth oxide, antimony sulfate, antimony acetate, and antimony chloride; more preferably at least one of bismuth ammonium citrate and antimony acetate.
In the above technical solution, the reducing agent in step (c) is not particularly required based on the understanding of those skilled in the art, and the reducing agent may be a gas or a liquid, and is preferably at least one of hydrogen and hydrazine hydrate; the drying temperature is preferably 30-120 ℃, and the drying time is preferably 1-5 hours; the drying temperature is preferably 80-120 ℃, and more preferably 100-120 ℃.
to solve the third technical problem, the technical scheme of the invention is as follows:
1, 4-diacetoxybutane is obtained by reacting hydrogen with 1, 4-diacetoxybutene in the presence of a catalyst according to any of the preceding technical claims.
the key of the invention is the selection of hydrogenation catalyst, and the skilled person knows how to determine suitable hydrogenation process conditions such as reaction temperature, reaction time, reaction pressure and feed ratio according to actual needs. However:
In the technical scheme, the temperature of the hydrogenation reaction is preferably 20-120 ℃.
In the above technical scheme, the pressure of the hydrogenation reaction is preferably 1.0-10.0 MPa, and more preferably 1.0-6.0 MPa.
In the technical scheme, the time of the hydrogenation reaction is preferably 0.5-5.0 h, and more preferably 0.5-2.0 h.
1, 4-diacetoxybutene is commercially available or can be synthesized by butadiene oxyacetylation. The butadiene oxyacetylation method can select Pd-Te/C as butadiene oxyacetylation catalyst. The content of palladium element in the suitable Pd-Te/C catalyst is preferably 2.50-5.00 g/L, and more preferably 3.00-4.50 g/L; the content of tellurium is preferably 0.50 to 3.00g/L, more preferably 1.00 to 2.50 g/L. The suitable temperature of the oxyacetylation reaction is preferably 40-150 ℃; the pressure of the oxyacetylation reaction is preferably 1.0-10.0 MPa; the preferred time of the oxyacetylation reaction is 0.5-5 h; the molar ratio of butadiene to acetic acid is preferably 0.010-2.0. After the butadiene is subjected to the butadiene oxyacetylation reaction, the mixture of the butadiene oxyacetylation reaction can be separated to obtain the target product 1, 4-diacetoxybutene, and then the hydrogenation reaction is carried out, or the hydrogenation reaction can be directly carried out without separating. However, in order to eliminate other impurities to cause system complexity and facilitate the same proportion, the section of the embodiment of the invention adopts pure 1, 4-diacetyloxybutene as the hydrogenation reaction raw material.
The product mixture of the hydrogenation reaction can be separated to obtain the target product 1, 4-diacetyloxybutane.
the 1, 4-diacetoxybutane can be further used to obtain 1,4-butanediol by a hydrolysis process. The selection of an appropriate hydrolysis catalyst and the determination of an appropriate hydrolysis reaction temperature, time and feed ratio are well known to those skilled in the art. The hydrolysis catalysts which are commonly used may be inorganic acids, inorganic bases, organic acids and organic bases. Such as hydrochloric acid, nitric acid, sulfuric acid, phosphoric acid, sodium hydroxide, potassium hydroxide, benzenesulfonic acid, and ion exchange resins. The appropriate hydrolysis reaction temperature is preferably 30-100 ℃; the hydrolysis reaction pressure is preferably 0-2.0 MPa; the solvent is preferably water.
the product mixture after hydrogenation reaction is analyzed by a gas chromatography-MASS spectrometer (GC-MASS), and the yield and selectivity of 1, 4-diacetoxybutane are calculated according to the following formula:
Compared with the prior art, the catalyst of the invention improves the yield and selectivity of 1, 4-diacetoxybutane.
The experimental result shows that when the method is adopted, the yield of the 1, 4-diacetoxybutane reaches 82.45 percent, the selectivity reaches 94.10 percent, and a better technical effect is achieved. Particularly, when the active component of the hydrogenation catalyst simultaneously comprises platinum, at least one metal element selected from iron-based metals and at least one metal element selected from group VA metals, more remarkable technical effects are obtained. The invention is further illustrated by the following examples.
Detailed Description
[ example 1 ]
Preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing 180ml of water solution of nickel acetate (Ni (OAc) 2.4H 2 O) containing 1.98g of Ni on the catalyst precursor IV, drying for 4 hours at 110 ℃ to obtain the catalyst.
The Pt content of the catalyst was determined by ICP to be 2.05g/L and the Ni content 1.98 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was analytically calculated to be 82.45% and the selectivity was 94.10%, and for ease of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed rates, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
[ example 2 ]
Preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of aqueous solution of antimony acetate (Sb (OAc) 3) containing 1.98g of Sb on the catalyst precursor IV, drying for 4 hours at 110 ℃ to obtain the catalyst.
the catalyst had a Pt content of 2.05g/L and an Sb content of 1.98g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was found to be 82.39% by analysis, and the selectivity was found to be 94.27%, and for convenience of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amount, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
[ COMPARATIVE EXAMPLE 1 ]
are comparative examples of [ example 1 ] and [ example 2 ].
Preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
and fourthly, washing the catalyst with water until no chloride ion exists, and drying the catalyst for 4 hours at 50 ℃ to obtain the catalyst.
the Pt content of the catalyst was determined by ICP to be 2.05 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was analytically calculated to be 75.18% and the selectivity was 91.35%, and for ease of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed rates, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
compared with the examples 1-2, the catalyst adopted by the invention has the advantages that the catalyst performance of the catalyst containing Pt and Ni active components and Pt and Sb active components is better than that of the catalyst containing Pt active components, the hydrogenation catalyst active components simultaneously contain Pt and at least one metal element compound selected from iron group metals and VA group metals, the activity and stability of the catalyst are improved, and the yield and selectivity of the 1, 4-diacetoxybutane are high.
[ COMPARATIVE EXAMPLE 2 ]
comparative example [ comparative example 1 ].
Preparation of hydrogenation catalyst:
Dissolving ammonium chloropalladite ((NH 4) 2 PdCl 4) containing 2.05g of Pd in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
and fourthly, washing the catalyst with water until no chloride ion exists, and drying the catalyst for 4 hours at 50 ℃ to obtain the catalyst.
The Pd content of the catalyst was determined by ICP to be 2.05 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was calculated analytically to be 70.07% and the selectivity was 88.11%, and for ease of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amounts, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
as can be seen from comparison with comparative example 1, the catalyst adopted by the invention has better performance than the catalyst containing Pd active component by using the Pt-containing active component, which shows that the hydrogenation catalyst uses Pt as the active component to favor the hydrogenation of 1, 4-diacetoxybutene, and the yield and the selectivity of 1, 4-diacetoxybutane are high.
[ example 3 ]
Preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing 180ml of aqueous solution of bismuth ammonium citrate containing 1.98g of Bi (NH 3) 2 C6H 7 O 7.4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The Pt content of the catalyst was determined by ICP to be 2.05g/L and the Bi content was determined to be 1.98 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was calculated analytically to be 82.37% and the selectivity was 94.28%, and for ease of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amounts, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
[ example 4 ]
preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of a cylindrical coconut shell activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.60cm 3/g and the specific surface area of 1000cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Fifthly, soaking 180ml of ferrous acetate (Fe (OAc) 2.4H 2 O) water solution containing 1.98g of Fe on the catalyst precursor IV, and drying for 4 hours at 100 ℃ to obtain the catalyst.
the Pt content of the catalyst was determined by ICP to be 2.05g/L and the Fe content was determined to be 1.98 g/L.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was found to be 82.41% by analysis, and the selectivity was found to be 94.12%, and for convenience of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amount, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
[ example 5 ]
Preparation of the catalyst:
Firstly, dissolving ammonium platinochloride ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of an apricot shell cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 1.00cm 3/g and the specific surface area of 1500cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Fifthly, soaking 180ml of ferrous nitrate (Fe (NO 3) 2.6H 2 O) water solution containing 1.98g of Fe on the catalyst precursor IV, and drying for 4 hours at 120 ℃ to obtain the catalyst.
the Pt content of the catalyst was determined by ICP to be 2.05g/L and the Fe content was determined to be 1.98 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was calculated analytically to be 82.40% and the selectivity was 94.08%, and for ease of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amounts, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively.
[ example 6 ]
preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of bamboo cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing the nickel nitrate (Ni (NO 3) 2.6H 2 O) solution containing 1.98g Ni in 180ml on the catalyst precursor IV, drying at 110 deg.C for 4 hours to obtain the catalyst.
The Pt content of the catalyst was determined by ICP to be 2.05g/L and the Ni content 1.98 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was analytically calculated to be 82.46% and the selectivity 94.15%, and for convenience of illustration and comparison, the preparation of the hydrogenation catalyst, the reaction conditions, the feed amount, the yield of 1, 4-diacetoxybutane and the selectivity are shown in tables 1 and 2, respectively.
[ example 7 ]
preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
fifthly, soaking 180ml of cobalt acetate (Co (OAc) 2.4H 2 O) water solution containing 1.98g of Co on the catalyst precursor IV, and drying for 4 hours at 110 ℃ to obtain the catalyst.
the Pt content of the catalyst is 2.05g/L and the Co content is 1.98g/L through ICP measurement.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 50 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was found to be 82.44% by analysis, the selectivity was found to be 94.13%, and the catalyst preparation, reaction conditions, feed rates, yield of 1, 4-diacetoxybutane and selectivity are shown in tables 1 and 2, respectively, for ease of illustration and comparison.
[ example 8 ]
Preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 1.50gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
fifthly, soaking 180ml of cobalt nitrate (Co (NO 3) 2.6H 2 O) water solution containing 1.00g of Co on the catalyst precursor IV, and drying for 4 hours at 110 ℃ to obtain the catalyst.
the Pt content of the catalyst was 1.50g/L and the Co content was 1.00g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 0.5MPa, introducing hydrogen until the pressure is 1.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 20 ℃, continuously reacting for 30min, and stopping the reaction. Cooling the reaction kettle to room temperature, and purifying to remove impurities to obtain the 1, 4-diacetyloxy butane.
The yield of 1, 4-diacetoxybutane was analytically calculated to be 80.70% and the selectivity 93.91%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, yield and selectivity of 1, 4-diacetoxybutane are shown in tables 1 and 2, respectively.
[ example 9 ]
Preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 5.00gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of nickel acetate (Ni (OAc) 2.4H 2 O) water solution containing 6.00g of Ni on the catalyst precursor IV, and drying for 4 hours at 110 ℃ to obtain the catalyst.
The Pt content of the catalyst was determined by ICP to be 5.00g/L and the Ni content was determined to be 6.00 g/L.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 6.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 120 ℃, continuously reacting for 120min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was calculated analytically to be 82.59% with a selectivity of 93.95%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, yield of 1, 4-diacetoxybutane and selectivity are shown in tables 1 and 2, respectively.
[ example 10 ]
preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing 180ml of water solution containing 1.30g of Ni and 0.68g of Co-containing nickel acetate (Ni (OAc) 2 & 6H 2 O) and cobalt acetate (Co (OAc) 2 & 4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst had a Pt content of 2.05g/L, a Ni content of 1.30g/L and a Co content of 0.68g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was found to be 83.41% by analysis and the selectivity to 94.38%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, yield and selectivity to 1, 4-diacetoxybutane were shown in tables 1 and 2, respectively.
As is clear from the comparison between example 10 and examples 1 and 7, in the catalyst used in the present invention, the metal element Ni and the metal element Co in the iron-based metal have a good synergistic effect in increasing the yield and selectivity of 1, 4-diacetoxybutane.
[ example 11 ]
Preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of aqueous solution containing 1.24g of Sb and 0.74g of Bi-containing antimony acetate (Sb (OAc) 3) and bismuth ammonium citrate (Bi (NH 3) 2 C6H 7 O 7.4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
the catalyst had a Pt content of 2.05g/L, a Sb content of 1.24g/L and a Bi content of 0.74g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was found to be 83.34% by analysis, the selectivity was found to be 94.49%, and the catalyst preparation, reaction conditions, feed rates, yield of 1, 4-diacetoxybutane and selectivity are shown in tables 1 and 2, respectively, for ease of illustration and comparison.
As can be seen from the comparison between example 11 and examples 2 and 3, in the catalyst used in the present invention, the metal element Sb and the metal element Bi in the group VA metals have a good synergistic effect in increasing the yield and selectivity of 1, 4-diacetoxybutane.
[ example 12 ]
preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing 180ml of aqueous solution containing 0.96g of Ni and 1.02g of Sb, nickel acetate (Ni (OAc) 2.6H 2 O) and antimony acetate (Sb (OAc) 3) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst had a Pt content of 2.05g/L, a Ni content of 0.96g/L and a Sb content of 1.02g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was found to be 84.36% by analysis, the selectivity was found to be 95.12%, and the preparation of the addition agent, the reaction conditions, the feed of materials, the yield of 1, 4-diacetoxybutane and the selectivity were shown in tables 1 and 2, respectively, for ease of illustration and comparison.
as can be seen from the comparison between example 12 and examples 1 and 2, in the catalyst used in the present invention, the metal element Ni in the iron group metal and the metal element Sb in the group VA metal have a good synergistic effect in increasing the yield and selectivity of 1, 4-diacetoxybutane.
[ example 13 ]
preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of aqueous solution containing 0.96g of Ni and 1.02g of Bi-containing nickel acetate (Ni (OAc) 2 & 6H 2 O) and bismuth ammonium citrate (Bi (NH 3) 2 C6H 7 O 7 & 4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst had a Pt content of 2.05g/L, a Ni content of 0.96g/L and a Bi content of 1.02g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was calculated analytically to be 84.34% with selectivity to 95.10%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, yield of 1, 4-diacetoxybutane and selectivity are shown in tables 1 and 2, respectively.
as can be seen from the comparison between example 13 and examples 1 and 3, in the catalyst used in the present invention, Ni, which is a metal element in the iron group metal, and Bi, which is a metal element in the VA group metal, have a better synergistic effect in increasing the yield and selectivity of 1, 4-diacetoxybutane.
[ example 14 ]
preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of aqueous solution containing 0.96g of Ni, 0.64g of Sb and 0.38g of Bi in nickel acetate (Ni (OAc) 2.6H 2 O), antimony acetate (Sb (OAc) 3) and bismuth ammonium citrate (Bi (NH 3) 2 C6H 7 O 7.4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst had a Pt content of 2.05g/L, a Ni content of 0.96g/L, a Sb content of 0.64g/L and a Bi content of 0.38g/L as determined by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was calculated analytically to be 85.26% with a selectivity of 95.41%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, yield of 1, 4-diacetoxybutane and selectivity are shown in tables 1 and 2, respectively.
As is clear from the comparison between example 14 and examples 12 and 13, the catalyst used in the present invention has a good synergistic effect of the metal element Ni in the iron-based metal and the metal elements Sb and Bi in the group VA metal in terms of improvement of the yield and selectivity of 1, 4-diacetoxybutane.
[ example 15 ]
Preparation of the catalyst:
Dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
Fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
Immersing 180ml of aqueous solution containing 0.96g of Co, 0.64g of Sb and 0.38g of Bi, cobalt acetate (Co (OAc) 2.4H 2 O), antimony acetate (Sb (OAc) 3) and bismuth ammonium citrate (Bi (NH 3) 2 C6H 7 O 7.4H 2 O) on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst has a Pt content of 2.05g/L, a Co content of 0.96g/L, an Sb content of 0.64g/L and a Bi content of 0.38g/L as measured by ICP.
1, 4-diacetoxybutane synthesis:
adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
The yield of 1, 4-diacetoxybutane was calculated analytically to be 85.16% with a selectivity of 95.47%, and the catalyst preparation, reaction conditions, feed rates, yield and selectivity of 1, 4-diacetoxybutane were shown in tables 1 and 2, respectively, for ease of illustration and comparison.
[ example 16 ]
Preparation of the catalyst:
dissolving ammonium chloroplatinite ((NH 4) 2 PtCl 4) containing 2.05gPt in 8 wt% hydrochloric acid aqueous solution to obtain 200ml of impregnation liquid, and impregnating 1L of coal-based cylindrical activated carbon carrier with the diameter of 3mm, the length of 2cm, the pore volume of 0.80cm 3/g and the specific surface area of 1200cm 2/g in the impregnation liquid to obtain a catalyst precursor I;
② standing and aging for 24h to obtain a catalyst precursor II;
③ reducing the catalyst precursor II by using 500ml of hydrazine hydrate with the concentration of 8 percent (calculated by the weight ratio of N 2 H 4. H 2 O) for 3 hours to obtain a catalyst precursor III;
fourthly, washing the solution until no chloride ion exists, and drying the solution for 4 hours at 50 ℃ to obtain a catalyst precursor IV;
immersing 180ml of aqueous solution of nickel acetate (Ni (OAc) 2.6H 2 O), cobalt acetate (Co (OAc) 2.4H 2 O), antimony acetate (Sb (OAc) 3) and bismuth ammonium citrate (Bi (NH 3) 2 C6H 7 O 7.4H 2 O) containing 0.61g of Ni, 0.35g of Co, 0.64g of Sb and 0.38g of Bi, on the catalyst precursor IV, and drying at 110 ℃ for 4 hours to obtain the catalyst.
The catalyst has a Pt content of 2.05g/L, a Ni content of 0.61g/L, a Co content of 0.35g/L, an Sb content of 0.64g/L and a Bi content of 0.38g/L as measured by ICP.
1, 4-diacetoxybutane synthesis:
Adding 15ml of 1, 4-diacetoxybutene, 30ml of toluene and 0.01mol of hydrogenation catalyst into a 100ml titanium reaction kettle, discharging air in the kettle by using argon, pressurizing to 1.0MPa, introducing hydrogen until the pressure is 3.0MPa, increasing the stirring speed to 600rpm, stirring, heating to the reaction temperature, controlling the reaction temperature to be 60 ℃, continuously reacting for 90min, and stopping the reaction.
the yield of 1, 4-diacetoxybutane was found to be 86.35% by analysis and the selectivity was found to be 95.60%, and for ease of illustration and comparison, the catalyst preparation, reaction conditions, feed rates, and yield and selectivity of 1, 4-diacetoxybutane were shown in tables 1 and 2, respectively.
as is clear from the comparison between example 16 and examples 14 and 15, the catalyst used in the present invention has a good synergistic effect of the metal elements Ni and Co in the iron-based metal and the metal elements Sb and Bi in the group VA metal in terms of improvement of the yield and selectivity of 1, 4-diacetoxybutane.
TABLE 1
TABLE 2

Claims (8)

1. the catalyst for the process of synthesizing 1, 4-diacetoxybutane from butadiene comprises a carrier and an active component, wherein the carrier is activated carbon, the active component comprises a Pt element and a promoter element, and the promoter element comprises at least one metal element selected from iron series metals and at least one metal element selected from VA group metals;
Wherein the content of Pt element in the catalyst is 1.00 ~ 8.00.00 g/L, and the content of promoter element is 0.50 ~ 10.00.00 g/L.
2. the catalyst according to claim 1, wherein the activated carbon is at least one of coal columnar carbon, coconut shell activated carbon, apricot shell activated carbon, and bamboo activated carbon.
3. the catalyst of claim 1, wherein the activated carbon has a specific surface area of 1000 ~ 1500 m 2/g and an adsorption pore volume of 0.60 ~ 1.00.00 cm 3/g.
4. The catalyst according to claim 1, wherein the iron-based metal in the catalyst is at least one selected from the group consisting of Fe, Co and Ni.
5. The catalyst of claim 1 wherein the group VA metal in the catalyst is selected from at least one of As, Sb and Bi.
6. The method for preparing the catalyst according to claim 1, comprising the steps of:
Mixing a solution containing platinum elements with a carrier according to the composition of a catalyst to obtain a catalyst precursor I;
ageing the catalyst precursor I to obtain a catalyst precursor II;
reducing the combined platinum element in the catalyst precursor II into simple substance platinum to obtain a catalyst precursor III;
Fourthly, washing and drying to obtain a catalyst precursor IV;
Loading the solution containing promoter element on the catalyst precursor IV by adopting an immersion method according to the composition of the catalyst, and drying to obtain the catalyst.
a process for the synthesis of 1, 4-diacetoxybutane by reacting hydrogen with 1, 4-diacetoxybutene in the presence of the catalyst of any one of claims 1 ~ 5 to obtain 1, 4-diacetoxybutane.
8. The method of claim 7, wherein the hydrogenation reaction pressure is 1.0-10.0 MPa, and the hydrogenation reaction time is 0.5-5.0 h.
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