CN107970932A - A kind of catalytic cellulose converts polynary alcohol catalyst and preparation method thereof and application method - Google Patents

A kind of catalytic cellulose converts polynary alcohol catalyst and preparation method thereof and application method Download PDF

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Publication number
CN107970932A
CN107970932A CN201711183119.7A CN201711183119A CN107970932A CN 107970932 A CN107970932 A CN 107970932A CN 201711183119 A CN201711183119 A CN 201711183119A CN 107970932 A CN107970932 A CN 107970932A
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cellulose
catalytic
catalyst
polynary alcohol
converts
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陆佳
刘伟
王欣
王玉鹏
唐诗洋
苏小红
范超
周闯
秦国辉
罗向东
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Energy and Environment Research Institute of Heilongjiang Province
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Energy and Environment Research Institute of Heilongjiang Province
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J27/00Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/14Phosphorus; Compounds thereof
    • B01J27/186Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J27/188Phosphorus; Compounds thereof with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium with chromium, molybdenum, tungsten or polonium
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    • B01J23/54Catalysts 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
    • B01J23/56Platinum group metals
    • B01J23/64Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/652Chromium, molybdenum or tungsten
    • B01J23/6527Tungsten
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    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
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    • B01J23/85Chromium, molybdenum or tungsten
    • B01J23/888Tungsten
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    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/89Catalysts 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
    • B01J23/8933Catalysts 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
    • B01J23/8993Catalysts 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 chromium, molybdenum or tungsten
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    • B01J35/00Catalysts, in general, characterised by their form or physical properties
    • B01J35/60Catalysts, in general, characterised by their form or physical properties characterised by their surface properties or porosity
    • B01J35/61Surface area
    • B01J35/615100-500 m2/g
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02Impregnation, coating or precipitation
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    • B01J37/00Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/34Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation
    • B01J37/341Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation
    • B01J37/343Irradiation by, or application of, electric, magnetic or wave energy, e.g. ultrasonic waves ; Ionic sputtering; Flame or plasma spraying; Particle radiation making use of electric or magnetic fields, wave energy or particle radiation of ultrasonic wave energy
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    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C29/00Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
    • C07C29/132Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring by reduction of an oxygen containing functional group

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Abstract

The invention belongs to polyalcohol catalyst field, and in particular to a kind of catalytic cellulose converts polynary alcohol catalyst and preparation method thereof and application method.The present invention is using carbon carrier as catalyst carrier, using two-step method first in its area load heteropoly acid, supported active metals component on this basis again, two kinds of functions of catalyzing hydrolysis and catalytic hydrogenation are concentrated on into a kind of catalyst, the hydrolysis of cellulose and hydrogenation are concentrated on into primary first-order equation process during use, cellulose has been simplified to the step of converting of polyalcohol, has improved transformation efficiency.The specific surface area of catalyst of catalytic cellulose conversion polyalcohol of the present invention is big, and heat endurance is good, and loss of active component is few, and cellulose high conversion rate, catalyst is easily separated with reaction product, can be recycled, and is a kind of green catalyst of good performance.The preparation process and use process of the polynary alcohol catalyst of catalytic cellulose conversion of the present invention are simple, and non-environmental-pollution is low for equipment requirements.

Description

A kind of catalytic cellulose converts polynary alcohol catalyst and preparation method thereof and application method
Technical field
The invention belongs to catalytic cellulose to convert polyalcohol catalyst field, and in particular to a kind of catalytic cellulose conversion is more First alcohol catalyst and preparation method thereof and application method.
Background technology
As the increasingly reduction of fossil resources and environmental problem constantly deteriorate, biomass resource is because of its recyclability, dioxy Changing the good environment effects such as carbon zero-emission becomes the focus of global concern.Cellulose is widely present in agriculture as non-cereal crops Woods discarded object, such as maize straw, bagasse and discarded sawdust, are biomass resources most abundant on the earth, annual output More than 100,000,000,000 tons.Cellulose is a kind of straight-chain polysaccharide macromolecule formed by β-D-Glucose by β -1,4- glucosides key connections Compound.By chemical catalysis means, cellulose through hydrolyze hydrogenation coupled reaction can be converted into polyalcohol, as sorbierite, glycerine, Ethylene glycol and propane diols etc., these polyalcohols be considered as a new generation greening platform compound, available for production bio-fuel-oil, Chemicals etc..
The reaction process of cellulose conversion polyalcohol includes:(1) hydrolysis of cellulose;(2) hydrolysate is hydrogenated to more First alcohol.Method for transformation main at present is that, first with inorganic acid such as hydrochloric acid, sulfuric acid, phosphoric acid, heteropoly acid, hydrolyzes cellulose It is then rapid Hydrogenation under Ru, Ni isoreactivity metallic catalyst catalytic action in carrying active component into monose and oligosaccharide Obtain polyalcohol.There is the problem of acid separation and recovery in this method, in addition, reaction temperature is higher, acid under the high temperature conditions, to anti- Answer the requirement of equipment very high.
The content of the invention
To solve above-mentioned the deficiencies in the prior art, the present invention provides a kind of catalytic cellulose convert polynary alcohol catalyst and Its preparation method and application method.
Technical solution of the present invention:
It is carried heteropoly acid and activity at the same time on the carbon carrier that a kind of catalytic cellulose of the present invention, which converts polynary alcohol catalyst, Metal salt is made, and the carbon carrier is carbon nanotubes, and the heteropoly acid is H4SiW12O40、H3PW12O40One or both of Mixture, the active metal salt are RuCl3Or Ni (NO3)2·6H2One or both of O.
The preparation method step that a kind of catalytic cellulose of the present invention converts polynary alcohol catalyst is as follows:
Step 1:Heteropoly acid saturated solution is prepared, carbon carrier is added in heteropoly acid saturated solution, at a certain temperature Ultrasonic immersing is carried out, carbon carrier taking-up drains away the water after completing ultrasonic immersing, is dried in vacuo, the carbon that carried heteropoly acid is made carries Body;
Step 2:Active metal salt is configured to the stablizing solution of certain mass concentration;
Step 3:The carbon carrier for the carried heteropoly acid that step 1 is obtained adds active metal salt solution made from step 2 In, ultrasonic immersing at a certain temperature, the collected by suction carbon carrier of carried heteropoly acid and active metal salt at the same time after dipping, It is dried in vacuo after the carbon carrier is washed with deionized, the carbon carrier is carried out at a certain temperature using reducing gas Reduction treatment, completes reduction treatment postcooling to room temperature, obtains catalytic cellulose and convert polynary alcohol catalyst.
Further, heteropoly acid described in step 1 is H4SiW12O40、H3PW12O40One or both of mixture;Institute It is carbon nanotubes to state carbon carrier;The ultrasonic immersing is ultrasonic immersing 20-180min at 60-120 DEG C;The vacuum drying is 50-120 DEG C of vacuum drying 12h.
Further, the carbon nanotubes is short hydroxyl multi-walled carbon nano-tube or short functionalized multi-wall carbonnanotubes, its In short hydroxyl multi-walled carbon nano-tube purity>98%, outer diameter length 20nm-30nm, 30nm-50nm,>50nm, interior path length It is 0.5-2 μm to spend for 5-15nm, length, specific surface area>90m2/g、>110m2/g、>160m2/ g, contained-OH mass fractions are 0.71wt% -1.76wt%;The purity of wherein short functionalized multi-wall carbonnanotubes>98%, outer diameter length 20nm-30nm, 30nm-50nm、>50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>170m2/g、> 200m2/ g, contained-COOH mass fractions are 0.49wt%-2.0wt%.
Further, active metal salt described in step 2 is RuCl3Or Ni (NO3)2·6H2One or both of O, institute It is 0.1-30% to state active metal salt solution mass concentration.
Further, active metal salt solution described in step 2 is RuCl3With Ni (NO3)2·6H2During O mixed solutions, institute State mixed solution to be the RuCl for being 0.1-30% by mass concentration3Solution and Ni (NO3)2·6H2O solution is 1- by volume 16:4 ratio is formulated.
Further, ultrasonic immersing described in step 3 is 45 DEG C of ultrasonic immersing 20-240min;The deionized water washing time Number is 5-8 times, when containing RuCl in active metal salt solution made from step 23When, wash into deionized water cleaning solution and examine Untill not detecting chlorion;The vacuum drying time is 24h;The reducing gas is that volume ratio is 1:1 nitrogen and hydrogen Mixed gas;The reduction treatment is reductase 12-8h at a temperature of 150-600 DEG C, and reducing gas flow is 150mL/min;It is described Be cooled to room temperature is cooled down in hydrogen atmosphere.
The application method that a kind of catalytic cellulose of the present invention converts polynary alcohol catalyst is by a certain percentage by catalysis fibre Element converts polynary alcohol catalyst, cellulose and deionized water and is added in autoclave, uses high pure nitrogen after sealing at room temperature Air in replacement reaction kettle, the high-purity hydrogen of certain pressure intensity is passed through into autoclave, in certain reaction temperature and stirring Hydrogenation reaction is hydrolyzed under speed;After reaction, product liquid is collected, the product liquid is that polyalcohol mixing is molten Liquid.
Further, the cellulose is dried in vacuo the cellulose obtained by 2-30h at a temperature of being 40-80 DEG C;The fiber The mass ratio that element converts polynary alcohol catalyst with catalytic cellulose is 3-20:1;The quality volume of the cellulose and deionized water Than for 1g:10-60mL.
Further, the pressure of the high-purity hydrogen is 3-10MPa, and the temperature of the hydrolysis hydrogenation reaction is 120-300 DEG C, mixing speed 100-300rpm, reaction time 2-24h.
Beneficial effects of the present invention:
1st, catalytic cellulose conversion polyalcohol specific surface area of catalyst of the present invention is big, and heat endurance is good, loss of active component Few, cellulose high conversion rate, catalyst is easily separated with reaction product, can be recycled, and is a kind of green catalysis of good performance Agent.
2nd, catalytic cellulose of the present invention converts polynary alcohol catalyst and concentrates on two kinds of functions of catalyzing hydrolysis and catalytic hydrogenation A kind of catalyst, primary first-order equation process is concentrated on during use by the hydrolysis of cellulose and hydrogenation, has simplified cellulose to more The step of converting of first alcohol, improves transformation efficiency.
3rd, catalytic cellulose of the present invention converts the preparation process of polynary alcohol catalyst and simple, no environment using process Pollution, it is low for equipment requirements, meet the requirement of Green Chemistry, application prospect is good, is converted using catalytic cellulose of the present invention more First alcohol catalyst carries out the preparation of polyalcohol, can mitigate the pressure for preparing polyalcohol using fossil as raw material for a long time, raw materials for production It is renewable, it can improve the ecological environment and reduce the discharge of carbon dioxide, there is significant Social benefit and economic benefit.
Brief description of the drawings
Fig. 1 is the preparation method and application method process flow chart that catalytic cellulose of the present invention converts polynary alcohol catalyst.
Embodiment
Technical scheme is described further with reference to embodiment, but is not limited thereto, it is every right Technical solution of the present invention technical scheme is modified or replaced equivalently, without departing from the spirit and scope of technical solution of the present invention, should all contain Cover in protection scope of the present invention.
Embodiment 1
Catalytic cellulose provided in this embodiment convert polynary alcohol catalyst be on the carbon carrier at the same time carried heteropoly acid and Active metal salt is made, and the carbon carrier is carbon nanotubes, and the heteropoly acid is H4SiW12O40、H3PW12O40In one kind or two The mixture of kind, the active metal salt is RuCl3Or Ni (NO3)2·6H2One or both of O.
The preparation method step that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst is as follows:
Step 1:Prepare H4SiW12O40、H3PW12O40One or both of saturated solution, carbon nanotubes carbon carrier is added Enter into above-mentioned heteropoly acid saturated solution, the ultrasonic immersing 20-180min at 60-120 DEG C, by carbon carrier after completion ultrasonic immersing Taking-up drains away the water, 50-120 DEG C of vacuum drying 12h, and the carbon carrier of carried heteropoly acid is made;
The carbon nanotubes is short hydroxyl multi-walled carbon nano-tube or short functionalized multi-wall carbonnanotubes, wherein short hydroxylating The purity of multi-walled carbon nanotube>98%, outer diameter length 20nm-30nm, 30nm-50nm,>50nm, interior electrical path length are 5-15nm, Length is 0.5-2 μm, specific surface area>90m2/g、>110m2/g、>160m2/ g, contained-OH mass fractions for 0.71wt%- 1.76wt%;The purity of wherein short functionalized multi-wall carbonnanotubes>98%, outer diameter length 20nm-30nm, 30nm-50nm,> 50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>170m2/g、>200m2/ g, contained- COOH mass fractions are 0.49wt%-2.0wt%.
Step 2:By RuCl3Or Ni (NO3)2·6H2It is 0.1-30%'s that one or both of O, which is configured to mass concentration, Stablizing solution;The active metal salt solution is RuCl3With Ni (NO3)2·6H2During O mixed solutions, the mixed solution be by Mass concentration is the RuCl of 0.1-30%3Solution and Ni (NO3)2·6H2O solution is 1-16 by volume:4 ratio is prepared Form.
Step 3:The carbon carrier for the carried heteropoly acid that step 1 is obtained adds active metal salt solution made from step 2 In, 45 DEG C of ultrasonic immersing 20-240min, the carbon of carried heteropoly acid and active metal salt carries collected by suction at the same time after dipping Body, vacuum drying 24h after the carbon carrier is washed with deionized 5-8 times, is 1 using volume ratio:1 nitrogen and hydrogen Mixed gas carries out reduction treatment 2-8h, reducing gas stream at a temperature of 150-600 DEG C as reducing gas to the carbon carrier Measure as 150mL/min, be cooled to room temperature after completing reduction treatment in hydrogen atmosphere, obtain catalytic cellulose conversion polyalcohol and urge Agent.Ultrasonic immersing method can be such that active ingredient is uniformly dispersed in solution, lift the effect of dip loading.
The application method that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst is by cellulose and catalysis fibre The mass ratio that element converts polynary alcohol catalyst is 3-20:1st, cellulose and the mass volume ratio of deionized water are 1g:10-60mL's Catalytic cellulose converts polynary alcohol catalyst by ratio, the cellulose obtained by 2-30h is dried in vacuo at a temperature of 40-80 DEG C and go from Sub- water is added in the stainless steel autoclave with polytetrafluoroethyllining lining, and the addition of deionized water must not exceed stainless The 2/3 of steel autoclave solvent, uses the air in high pure nitrogen replacement reaction kettle, into autoclave at room temperature after sealing The high-purity hydrogen of 3-10MPa is passed through, at a temperature of 120-300 DEG C, hydrogenation reaction is hydrolyzed with 100-300rpm mixing speeds, Reaction time is 2-24h, after reaction, collects product liquid, the product liquid is polynary mixed alkoxide solution.
Embodiment 2
It is same on short hydroxyl multi-walled carbon nano-tube that catalytic cellulose provided in this embodiment, which converts polynary alcohol catalyst I, When load H3PW12O40And RuCl3It is made.
The preparation method step that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst I is as follows:
Step 1:Prepare H3PW12O40Saturated solution, adds short hydroxyl multi-walled carbon nano-tube as carbon carrier H3PW12O40In saturated solution, the ultrasonic immersing 60min at 90 DEG C, by short hydroxyl multi-walled carbon nano-tube after completion ultrasonic immersing Taking-up drains away the water, and 90 DEG C of vacuum drying 12h, are made load H3PW12O40Short hydroxyl multi-walled carbon nano-tube;
The purity of the short hydroxyl multi-walled carbon nano-tube>98%, outer diameter length 20nm-30nm, 30nm-50nm,> 50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>110m2/g、>160m2/ g, contained-OH Mass fraction is 0.71wt% -1.76wt%;
Step 2:By RuCl3It is configured to the stablizing solution 100mL that mass concentration is 7%;
Step 3:H will be loaded made from step 13PW12O40Short hydroxyl multi-walled carbon nano-tube add step 2 be made RuCl3In solution, 45 DEG C of ultrasonic immersing 60min, filter after dipping, collect and load H at the same time3PW12O40And RuCl3It is short Hydroxyl multi-walled carbon nano-tube, the short hydroxyl multi-walled carbon nano-tube is washed with deionized into deionized water cleaning solution 24h is dried in vacuo after can't detect chlorion, is 1 using volume ratio:1 nitrogen and the mixed gas of hydrogen are as reducing gas To described while load H at a temperature of 180 DEG C3PW12O40And RuCl3Short hydroxyl multi-walled carbon nano-tube carry out reduction treatment 6h, reducing gas flow are 150mL/min, are cooled to room temperature after completing reduction treatment in hydrogen atmosphere, obtain catalysis fibre Element converts polynary alcohol catalyst I.
The application method that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst I be by 1.5g at a temperature of 65 DEG C Cellulose, 0.5g catalytic celluloses obtained by vacuum drying 3h convert polynary alcohol catalyst I and 30mL deionized waters are added to band Have in the 100mL stainless steel autoclaves of polytetrafluoroethyllining lining, at room temperature with high pure nitrogen replacement reaction kettle after sealing Air, the high-purity hydrogen of 5MPa is passed through into autoclave, at a temperature of 150 DEG C, water is carried out with 150rpm mixing speeds Hydrogenation reaction is solved, reaction time 8h, after reaction, collects product liquid, the product liquid is that polyalcohol mixing is molten Liquid, product liquid use high performance liquid chromatography qualitative and quantitative analysis, obtain each Product yields;
Obtained solid part is unreacted cellulose and catalyst after reaction, and solid portion is washed with deionized water 85 DEG C of vacuum drying 5h, weigh after washing 6 times, and it is cellulose quality after reacting that gained weight, which subtracts catalyst weight,;
Cellulose conversion ratio and polyalcohol yield are calculated using equation below:
Cellulose quality before cellulose conversion ratio=(cellulose quality after cellulose quality-reaction before reaction)/reaction × 100%;
Polyalcohol yield=gained polyol quality/(cellulose quality after cellulose quality-reaction before reaction) × 100%.
The cellulose of certain mass is supplemented after to hydrolysis hydrogenation reaction in remaining cellulose and catalyst, makes cellulose material Measure as 1.5g, the application method that polynary alcohol catalyst is converted by catalytic cellulose provided in this embodiment carries out repeating hydrolysis hydrogenation Experiment, test catalytic cellulose convert the catalytic activity that can be recycled of polynary alcohol catalyst.
Embodiment 3
Catalytic cellulose conversion polyalcohol catalyst II provided in this embodiment is on short hydroxyl multi-walled carbon nano-tube Load H at the same time3PW12O40、RuCl3With Ni (NO3)2·6H2O is made.
A kind of preparation method step of catalytic cellulose conversion polyalcohol catalyst II of the present embodiment is as follows:
Step 1:Prepare H3PW12O40Saturated solution, adds short hydroxyl multi-walled carbon nano-tube as carbon carrier H3PW12O40In saturated solution, the ultrasonic immersing 60min at 90 DEG C, by short hydroxyl multi-walled carbon nano-tube after completion ultrasonic immersing Taking-up drains away the water, and 90 DEG C of vacuum drying 12h, are made load H3PW12O40Short hydroxyl multi-walled carbon nano-tube;
The purity of the short hydroxyl multi-walled carbon nano-tube>98%, outer diameter length 20nm-30nm, 30nm-50nm,> 50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>110m2/g、>160m2/ g, contained-OH Mass fraction is 0.71wt% -1.76wt%;
Step 2:By RuCl3The stablizing solution 50mL that mass concentration is 4% is configured to, by Ni (NO3)2·6H2O is configured to Mass concentration is 6% stablizing solution 50mL, the two kinds of solution by volume 1 that will be prepared number:1 is uniformly mixed;
Step 3:H will be loaded made from step 13PW12O40Short hydroxyl multi-walled carbon nano-tube add step 2 be made RuCl3With Ni (NO3)2·6H2In O mixed solutions, 45 DEG C of ultrasonic immersing 90min, filter after dipping, collect negative at the same time Carry H3PW12O40、RuCl3With Ni (NO3)2·6H2The short hydroxyl multi-walled carbon nano-tube of O, by the short hydroxylating multi-wall carbon nano-tube Pipe is washed with deionized into deionized water cleaning solution can't detect chlorion after be dried in vacuo 24h, using volume ratio be 1:1 Nitrogen and hydrogen mixed gas as reducing gas at a temperature of 500 DEG C to described while load H3PW12O40And RuCl3's Short hydroxyl multi-walled carbon nano-tube carries out reduction treatment 6h, and reducing gas flow is 150mL/min, in hydrogen after completion reduction treatment It is cooled to room temperature in gas atmosphere, obtains catalytic cellulose conversion polyalcohol catalyst II.
A kind of application method of catalytic cellulose of the present embodiment conversion polyalcohol catalyst II be by 1g at a temperature of 50 DEG C Cellulose, 0.2g catalytic celluloses conversion polyalcohol catalyst II and 60mL deionized waters obtained by vacuum drying 2h are added to band Have in the 100mL stainless steel autoclaves of polytetrafluoroethyllining lining, at room temperature with high pure nitrogen replacement reaction kettle after sealing Air, the high-purity hydrogen of 7MPa is passed through into autoclave, at a temperature of 200 DEG C, water is carried out with 150rpm mixing speeds Hydrogenation reaction is solved, reaction time 3h, after reaction, collects product liquid, the product liquid is that polyalcohol mixing is molten Liquid.
Test what cellulose conversion ratio, polyalcohol yield and catalyst can be recycled according to the same manner as in Example 2 Catalytic activity.
Embodiment 4
It is on short hydroxyl multi-walled carbon nano-tube that catalytic cellulose provided in this embodiment, which converts polynary alcohol catalyst III, Load H at the same time4SiW12O40With Ni (NO3)2·6H2O is made.
The preparation method step that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst III is as follows:
Step 1:Prepare H4SiW12O40Saturated solution, adds short functionalized multi-wall carbonnanotubes as carbon carrier H4SiW12O40In saturated solution, the ultrasonic immersing 120min at 80 DEG C, by short carboxylated multi-wall carbon nano-tube after completion ultrasonic immersing Pipe takes out and drains away the water, and 70 DEG C of vacuum drying 12h, are made load H4SiW12O40Short functionalized multi-wall carbonnanotubes;
The purity of the short functionalized multi-wall carbonnanotubes>98%, outer diameter length 20nm-30nm, 30nm-50nm,> 50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>170m2/g、>200m2/ g, contained- COOH mass fractions are 0.49wt%-2.0wt%;
Step 2:By Ni (NO3)2·6H2O is configured to the stablizing solution 100mL that mass concentration is 10%;
Step 3:H will be loaded made from step 14SiW12O40Short functionalized multi-wall carbonnanotubes add step 2 be made Ni(NO3)2·6H2In O mixed solutions, 45 DEG C of ultrasonic immersing 120min, filter after dipping, and collection loads at the same time H4SiW12O40With Ni (NO3)2·6H2The short functionalized multi-wall carbonnanotubes of O, the short functionalized multi-wall carbonnanotubes are spent 24h is dried in vacuo after ion water washing 8 times, is 1 using volume ratio:1 nitrogen and the mixed gas of hydrogen are as reducing gas To described while load H at a temperature of 300 DEG C4SiW12O40With Ni (NO3)2·6H2The short functionalized multi-wall carbonnanotubes of O carry out Reduction treatment 7h, reducing gas flow are 150mL/min, are cooled to room temperature, obtain in hydrogen atmosphere after completing reduction treatment Catalytic cellulose converts polynary alcohol catalyst III.
The application method that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst III be by 2g at a temperature of 75 DEG C Cellulose, 0.2g catalytic celluloses obtained by vacuum drying 10h convert polynary alcohol catalyst III and 60mL deionized waters are added to In 100mL stainless steel autoclaves with polytetrafluoroethyllining lining, high pure nitrogen replacement reaction kettle is used after sealing at room temperature Interior air, the high-purity hydrogen of 9MPa is passed through into autoclave, at a temperature of 250 DEG C, is carried out with 200rpm mixing speeds Hydrogenation reaction is hydrolyzed, reaction time 10h, after reaction, collects product liquid, the product liquid is polyalcohol mixing Solution.
Test what cellulose conversion ratio, polyalcohol yield and catalyst can be recycled according to the same manner as in Example 2 Catalytic activity.
Embodiment 5
It is on short hydroxyl multi-walled carbon nano-tube that catalytic cellulose provided in this embodiment, which converts polynary alcohol catalyst IV, Load H at the same time3PW12O40、H4SiW12O40、RuCl3With Ni (NO3)2·6H2O is made.
The preparation method step that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst IV is as follows:
Step 1:Prepare H3PW12O40And H4SiW12O40Mixing saturated solution, short functionalized multi-wall carbonnanotubes are made H is added for carbon carrier3PW12O40And H4SiW12O40Mixing saturated solution in, the ultrasonic immersing 150min at 70 DEG C, is completed super Short functionalized multi-wall carbonnanotubes are taken out after sound dipping and are drained away the water, 110 DEG C of vacuum drying 12h, are made and load at the same time H3PW12O40And H4SiW12O40Short functionalized multi-wall carbonnanotubes;
The purity of the short functionalized multi-wall carbonnanotubes>98%, outer diameter length 20nm-30nm, 30nm-50nm,> 50nm, interior electrical path length are 5-15nm, and length is 0.5-2 μm, specific surface area>90m2/g、>170m2/g、>200m2/ g, contained- COOH mass fractions are 0.49wt%-2.0wt%;
Step 2:By RuCl3The stablizing solution 80mL that mass concentration is 8% is configured to, by Ni (NO3)2·6H2O is configured to Mass concentration is 12% stablizing solution 20mL, by prepared two kinds of solution by volume 4:1 is uniformly mixed;
Step 3:H is loaded while step 1 is made3PW12O40And H4SiW12O40Short functionalized multi-wall carbonnanotubes Add step 2 and RuCl is made3With Ni (NO3)2·6H2In O mixed solutions, 45 DEG C of ultrasonic immersing 200min, take out after dipping Filter, collects and loads H at the same time3PW12O40、H4SiW12O40、RuCl3With Ni (NO3)2·6H2The short functionalized multi-wall carbonnanotubes of O, will The short functionalized multi-wall carbonnanotubes, which are washed with deionized into deionized water cleaning solution, can't detect vacuum after chlorion Dry 24h, is 1 using volume ratio:1 nitrogen and the mixed gas of hydrogen as reducing gas at a temperature of 400 DEG C to described Load H at the same time3PW12O40、H4SiW12O40、RuCl3With Ni (NO3)2·6H2The short functionalized multi-wall carbonnanotubes of O carry out also original place 4h is managed, reducing gas flow is 150mL/min, is cooled to room temperature after completing reduction treatment in hydrogen atmosphere, and it is fine to obtain catalysis Dimension element converts polynary alcohol catalyst IV.
The application method that a kind of catalytic cellulose of the present embodiment converts polynary alcohol catalyst IV is in 80 DEG C of temperature by 2.5g Cellulose, 0.5g catalytic celluloses obtained by lower vacuum drying 20h convert polynary alcohol catalyst IV and 50mL deionized waters add Replaced and reacted with high pure nitrogen at room temperature into the 100mL stainless steel autoclaves with polytetrafluoroethyllining lining, after sealing Air in kettle, the high-purity hydrogen of 6MPa is passed through into autoclave, at a temperature of 200 DEG C, with 250rpm mixing speeds into Row hydrolysis hydrogenation reaction, reaction time 20h, after reaction, collects product liquid, the product liquid is that polyalcohol mixes Close solution.
Test what cellulose conversion ratio, polyalcohol yield and catalyst can be recycled according to the same manner as in Example 2 Catalytic activity.
The performance parameter of catalyst made from embodiment 2- embodiments 5, catalytic cellulose conversion polyalcohol conversion ratio and Polyalcohol yield, recyclable number are as shown in table 1:
Table 1:
The catalytic cellulose that it can be seen from data in table 1 prepared by preparation method of the present invention converts polynary alcohol catalyst ratio Surface area is big, and heat endurance is good, and catalytic activity is good, and loss of active component is few, cellulose high conversion rate, catalyst and reaction product It is easily separated, it can be recycled, it is free from environmental pollution, it is a kind of green catalyst of good performance.
Catalytic cellulose prepared by preparation method of the present invention converts polynary alcohol catalyst by catalyzing hydrolysis and catalytic hydrogenation two Kind function concentrates on a kind of catalyst, and the hydrolysis of cellulose and hydrogenation are concentrated on primary first-order equation process during use, simplified Step of converting of the cellulose to polyalcohol, improves transformation efficiency.Catalytic cellulose of the present invention converts polynary alcohol catalyst Preparation process and use process are simple, and non-environmental-pollution is low for equipment requirements.

Claims (10)

1. a kind of catalytic cellulose converts polynary alcohol catalyst, it is characterised in that the catalyst is on the carbon carrier while loads Heteropoly acid and active metal salt are made, and the carbon carrier is carbon nanotubes, and the heteropoly acid is H4SiW12O40、H3PW12O40In One or two kinds of mixtures, the active metal salt is RuCl3Or Ni (NO3)2·6H2One or both of O.
2. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to claim 1, it is characterised in that on It is as follows to state preparation method step:
Step 1:Heteropoly acid saturated solution is prepared, carbon carrier is added in heteropoly acid saturated solution, is carried out at a certain temperature Ultrasonic immersing, carbon carrier taking-up is drained away the water, be dried in vacuo, the carbon carrier of carried heteropoly acid is made after completing ultrasonic immersing;
Step 2:Active metal salt is configured to the stablizing solution of certain mass concentration;
Step 3:The carbon carrier for the carried heteropoly acid that step 1 is obtained is added in active metal salt solution made from step 2, Ultrasonic immersing at a certain temperature, the collected by suction carbon carrier of carried heteropoly acid and active metal salt at the same time after dipping, will The carbon carrier is dried in vacuo after being washed with deionized, and the carbon carrier is gone back at a certain temperature using reducing gas Original place is managed, and is completed reduction treatment postcooling to room temperature, is obtained the catalyst of catalytic cellulose conversion polyalcohol.
3. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to claim 2, it is characterised in that step A rapid heteropoly acid is H4SiW12O40、H3PW12O40One or both of mixture;The carbon carrier is carbon nanotubes; The ultrasonic immersing is ultrasonic immersing 20-180min at 60-120 DEG C;The vacuum drying is 50-120 DEG C of vacuum drying 12h.
4. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to claim 3, it is characterised in that institute It is short hydroxyl multi-walled carbon nano-tube or short functionalized multi-wall carbonnanotubes to state carbon nanotubes, wherein short hydroxylating multi-wall carbon nano-tube The purity of pipe>98%, outer diameter length 20nm-30nm, 30nm-50nm,>50nm, interior electrical path length are 5-15nm, length 0.5- 2 μm, specific surface area>90m2/g、>110m2/g、>160m2/ g, contained-OH mass fractions are 0.71wt% -1.76wt%;Wherein The purity of short functionalized multi-wall carbonnanotubes>98%, outer diameter length 20nm-30nm, 30nm-50nm,>50nm, interior electrical path length For 5-15nm, length is 0.5-2 μm, specific surface area>90m2/g、>170m2/g、>200m2/ g, contained-COOH mass fractions are 0.49wt%-2.0wt%.
5. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to Claims 2 or 3, it is characterised in that Active metal salt described in step 2 is RuCl3Or Ni (NO3)2·6H2One or both of O, the active metal salt solution matter Amount concentration is 0.1-30%.
6. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to claim 5, it is characterised in that step Rapid two active metal salt solution is RuCl3With Ni (NO3)2·6H2During O mixed solutions, the mixed solution is dense by quality Degree is the RuCl of 0.1-30%3Solution and Ni (NO3)2·6H2O solution is 1-16 by volume:4 ratio is formulated.
7. a kind of catalytic cellulose converts the preparation method of polynary alcohol catalyst according to claim 5, it is characterised in that step Rapid three ultrasonic immersing is 45 DEG C of ultrasonic immersing 20-240min;The deionized water washing times are 5-8 times, work as step 2 Contain RuCl in obtained active metal salt solution3When, wash untill can't detect chlorion into deionized water cleaning solution; The vacuum drying time is 24h;The reducing gas is that volume ratio is 1:1 nitrogen and the mixed gas of hydrogen;It is described to go back Original place reason is reductase 12-8h at a temperature of 150-600 DEG C, and reducing gas flow is 150mL/min;Described be cooled to room temperature is in hydrogen Cooled down in gas atmosphere.
8. a kind of catalytic cellulose converts the application method of polynary alcohol catalyst according to claim 1, it is characterised in that institute It is that catalyst, cellulose and the deionized water of catalytic cellulose conversion polyalcohol are added to height by a certain percentage to state application method Press in reaction kettle, a level pressure is passed through into autoclave with the air in high pure nitrogen replacement reaction kettle at room temperature after sealing Strong high-purity hydrogen, hydrogenation reaction is hydrolyzed under certain reaction temperature and mixing speed;After reaction, liquid production is collected Thing, the product liquid are polynary mixed alkoxide solution.
9. a kind of catalytic cellulose converts the application method of polynary alcohol catalyst according to claim 8, it is characterised in that institute State the cellulose being dried in vacuo at a temperature of cellulose is 40-80 DEG C obtained by 2-30h;The cellulose and catalytic cellulose conversion are more The mass ratio of the catalyst of first alcohol is 3-20:1;The cellulose and the mass volume ratio of deionized water are 1g:10-60mL.
10. a kind of catalytic cellulose converts the application method of polynary alcohol catalyst according to claim 8 or claim 9, its feature exists It is 3-10MPa in the pressure of the high-purity hydrogen, the temperature of the hydrolysis hydrogenation reaction is 120-300 DEG C, and mixing speed is 100-300rpm, reaction time 2-24h.
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