CN115069295A - Preparation method of catalyst for catalytic cracking waste - Google Patents

Preparation method of catalyst for catalytic cracking waste Download PDF

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Publication number
CN115069295A
CN115069295A CN202210840001.1A CN202210840001A CN115069295A CN 115069295 A CN115069295 A CN 115069295A CN 202210840001 A CN202210840001 A CN 202210840001A CN 115069295 A CN115069295 A CN 115069295A
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solution
added
amount
hydrochloric acid
chloride
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CN115069295B (en
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高明军
钟晓亮
郭卡莉
谭映临
叶红
张新功
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Qingdao Huicheng Environmental Protection Technology Group Co ltd
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Qingdao Huicheng Environmental Protection Technology Group Co ltd
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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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/80—Mixtures of different zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8603—Removing sulfur compounds
    • B01D53/8609—Sulfur oxides
    • 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
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
    • C10G1/10—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal from rubber or rubber waste
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/204—Carbon monoxide
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2257/00—Components to be removed
    • B01D2257/30—Sulfur compounds
    • B01D2257/302—Sulfur oxides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/02—Other waste gases
    • B01D2258/0283—Flue gases
    • 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
    • B01J2229/00—Aspects of molecular sieve catalysts not covered by B01J29/00
    • B01J2229/10—After treatment, characterised by the effect to be obtained
    • B01J2229/18—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself
    • B01J2229/186—After treatment, characterised by the effect to be obtained to introduce other elements into or onto the molecular sieve itself not in framework positions
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/16—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J29/166—Y-type faujasite
    • 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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/48—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing arsenic, antimony, bismuth, vanadium, niobium tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2300/00—Aspects relating to hydrocarbon processing covered by groups C10G1/00 - C10G99/00
    • C10G2300/10—Feedstock materials
    • C10G2300/1003—Waste materials
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/02—Gasoline
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G2400/00—Products obtained by processes covered by groups C10G9/00 - C10G69/14
    • C10G2400/04—Diesel oil
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00—Technologies relating to chemical industry
    • Y02P20/50—Improvements relating to the production of bulk chemicals
    • Y02P20/52—Improvements relating to the production of bulk chemicals using catalysts, e.g. selective catalysts

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Analytical Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Catalysts (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

The invention discloses a preparation method of a catalyst for catalytic cracking waste materials, which takes a self-made lamellar structure material as a base, and can be used as a pre-cracking place after being inserted into a proper acid-base active center, and can also play a role in converting SOx in flue gas into H 2 The S can promote the sufficient combustion of CO, and mainly aims at the cracking treatment of rubber wastes containing various additives, so that better product distribution can be obtained, the problem of disordered discharge of sulfur can be avoided, and better economic and social benefits are achieved.

Description

Preparation method of catalyst for catalytic cracking waste
Technical Field
The invention relates to a preparation method of a catalyst for catalytic cracking waste materials, and belongs to the field of catalyst preparation.
Background
The waste rubber is one kind of solid waste, and the waste rubber is mainly from waste rubber products, namely scrap tires, rickshaw tires, rubber tubes, adhesive tapes, industrial sundries and the like, and the other part of the waste rubber is from leftover materials and waste products generated in the production process of rubber product factories.
The treatment of waste rubber is one of the serious problems faced by people at present, in order to meet the continuously improved material performance requirements, the rubber develops towards the directions of high strength, wear resistance, stability and aging resistance, and simultaneously, the problem that the waste rubber cannot be naturally degraded for a long time is caused, a large amount of waste rubber causes black pollution which is more difficult to treat than plastic pollution (white pollution), and millions of tons of waste rubber are generated in the world every year.
The waste rubber contains various additives
(1) Sulfur is taken as a main component, and sulfur dioxide is changed into sulfur dioxide during regeneration and is discharged along with flue gas to form acid rain;
(2) and (3) supplement of a filling agent: high proportion of carbon black, the number of carbon black used in the rubber industry is as many as 52, the rubber particles are wrapped during cracking gasification, the combustion is insufficient, the oxygen consumption is high, and the resistance of the regenerated scorching high temperature to the catalyst carrier is higher.
(3) Anti-aging agents, physical and chemical anti-aging agents: amines, ketoamines, aldamines, phenols, and the like.
(4) Vulcanization accelerator and accelerator aid: calcium oxide, magnesium oxide, zinc oxide, stearic acid, TMTD, DM and the like.
(5) Foaming agent: sodium bicarbonate.
(6) Colorant: a metal.
At present, foreign solutions mainly comprise two kinds, one is that waste rubber is combusted in the environment of high temperature, high pressure and high concentration oxygen to generate heat and provide supplementary energy for factories needing steam, and the defects of the method are large investment, insecurity and high cost. And secondly, the waste rubber is ground into powder by a physical method for recycling, and the defect that only a natural rubber part can be utilized and a large amount of secondary waste is still generated.
It has been studied abroad that the chain scission of the polyisoprene-containing polymer rubber by thermal decomposition into small molecular petroleum gas and fuel oil, and the waste residue after decomposition into carbon black product is still in the test stage.
CN107391C discloses a method and a device for preparing gasoline, diesel and carbon black from waste tires, wherein the method comprises the steps of crushing the waste tires, sending the crushed waste tires into a thermal cracking reactor, introducing nitrogen, water vapor, combustion waste gas and the like serving as carrier gas, heating to 370 ℃ and 500 ℃, and staying for 5-20 minutes to obtain the gasoline, the light diesel and the heavy diesel.
CN1869160A discloses a method for preparing fuel oil by catalytic cracking of waste tires, which uses a cracking catalyst barium titanium ore composite oxide.
At present, thermal cracking or catalytic cracking of waste rubber becomes a research hotspot, but is still in a laboratory stage basically, and has the problems of low yield, poor selectivity and the like, and a proper catalyst needs to be selected to improve a cracking product.
Disclosure of Invention
In view of the problems of the prior art, the invention aims to provide a preparation method of a catalyst for converting waste materials into oil products.
The preparation method comprises the following steps:
(1) preparing solution A from magnesium chloride, calcium chloride and hydrochloric acid;
(2) adding the solution A into a sodium metaaluminate solution according to a certain proportion, uniformly stirring, heating and standing for 5-10 hours;
(3) adding cerous chloride, vanadyl oxalate and aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) to a pH value of 6-8, filtering and washing;
(5) pulping the filter cake, adding ZSM-5, Y-type molecular sieve and hydrochloric acid in a certain proportion, spraying, granulating, roasting, washing and drying to obtain the title product.
In the step (1) and the step (2), the addition ratio of magnesium chloride, calcium chloride and sodium metaaluminate is MgO in mass ratio of oxides: CaO: al (Al) 2 O 3 ＝1.95-2.05：0.9-1.1：1。
The addition amount of hydrochloric acid in the step (1) is 0.45m in terms of HCl MgO +0.1m CaO -0.4m Al2O3 。
In the step (3), the adding amount of the cerous chloride accounts for 8-15 wt% of the dry basis of the title object in terms of cerium oxide, the adding amount of the vanadyl oxalate accounts for 0.5-1.3 wt% of the dry basis of the title object in terms of vanadium pentoxide, and the adding amount of the aluminum sulfate accounts for 5-10 wt% of the dry basis of the title object in terms of aluminum oxide.
The amount of ZSM-5+ Y type molecular sieve added in step (5) was 20 to 35 wt% based on the dry weight of the titled substance.
The adding amount of the hydrochloric acid in the step (5) is (0.005-0.030) m in terms of HCl Al2O3 。
The catalyst prepared by the invention has the following remarkable advantages:
(1) the self-made magnesium-aluminum material has a layered structure, and certain intervals are formed among layers of the material, so that oil gas macromolecules can be diffused, and the material can be used as a pre-cracking place.
(2) The interlayer ions have exchangeable characteristics, so that proper metal ions can be inserted to realize a special function, and the inserted cerium metal has an element with an oxygen storage function, can realize a combustion-supporting function and promotes the sufficient combustion of CO.
(3) The magnesium-aluminum structure is cooperated with cerium and vanadium, and can convert SOx in the flue gas into H 2 S can reduce SOx disordered discharge and protect environment.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following examples, which are intended to illustrate only some of the present invention and are not intended to limit the scope of the present invention.
The raw materials are all industrial grade and are obtained from Qingdao Huicheng environmental protection science and technology corporation.
The waste rubber is crushed into 1-5mm particles and is taken from the leftovers of a certain shoe factory.
The evaluation device is a self-built tubular reaction furnace, rubber particles are injected after being pressurized in a glass conical feeder, the height of a catalyst material is 5cm, the reaction temperature is 480 ℃, and a product is condensed and collected and then is analyzed and assayed by using a gas chromatography.
Example 1
(1)1436.5g of magnesium chloride hexahydrate, 279g of calcium chloride and 85.1g of hydrochloric acid are prepared into a solution A;
(2) solution A was added to 1410ml of sodium metaaluminate (Al) 2 O 3 100g/L), stirring uniformly, heating to 75 +/-2 ℃, and standing for 8 hours;
(3) adding 181.8g of cerous chloride pentahydrate, 8.52g of vanadyl oxalate and 1111ml of aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) to a pH value of 7.1, filtering and washing;
(5) the filter cake is beaten and added with ZSM-5 and Y type molecular sieve 250g and hydrochloric acid 18.5g (13 wt%), and then spray granulation, roasting, washing and drying are carried out, and the mixture is marked as CAT-1.
Example 2
(1)1314.7g of magnesium chloride hexahydrate, 249.5g of calcium chloride and 78.8g of hydrochloric acid are prepared into a solution A;
(2) solution A was added to 1260ml of sodium metaaluminate (Al) 2 O 3 100g/L), stirring uniformly, heating to 83 +/-2 ℃, and standing for 6 hours;
(3) adding 227.3g of cerous chloride pentahydrate, 13.6g of vanadyl oxalate and 888.9ml of aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) to a pH value of 7.5, filtering and washing;
(5) the filter cake is beaten and added with ZSM-5, Y type molecular sieve 300g and hydrochloric acid 31.7g (13 wt%), and then spray granulation, roasting, washing and drying are carried out, and the mixture is marked as CAT-2.
Example 3
(1)1187.8g of magnesium chloride hexahydrate, 203.9g of calcium chloride and 68.9g of hydrochloric acid are prepared into a solution A;
(2) solution A was added to 1140ml of sodium metaaluminate (Al) 2 O 3 100g/L), stirring uniformly, heating to 65 +/-2 ℃, and standing for 8 hours;
(3) 272.7g of cerous chloride pentahydrate, 17.1g of vanadyl oxalate and 777.8ml of aluminum sulfate solution are added into the solution in the step (2) in sequence and aged for 30 minutes;
(4) adding ammonia water into the solution in the step (3) until the pH value is 6.5, filtering and washing;
(5) the filter cake is beaten and ZSM-5 and Y type molecular sieve 350g and hydrochloric acid 35.4g (13 wt%) are added, and then spray granulation, roasting, washing and drying are carried out, and the mixture is marked as CAT-4.
Example 4
(1)1553.3g magnesium chloride hexahydrate, 273.3g calcium chloride and 90.3g hydrochloric acid are prepared into a solution A;
(2) solution A was added to 1530ml of sodium metaaluminate (Al) 2 O 3 100g/L), stirring uniformly, heating to 80 +/-2 ℃, and standing for 10 hours;
(3) adding 318.2g of cerous chloride pentahydrate, 22.1g of vanadyl oxalate and 555.6ml of aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) until the pH value is 6.9, filtering and washing;
(5) the filter cake is beaten and ZSM-5 and Y type molecular sieve 200g and hydrochloric acid (13 wt%) 12.5 are added, and then spray granulation, roasting, washing and drying are carried out, and the mixture is marked as CAT-4.
Example 5
(1)1578.7g of magnesium chloride hexahydrate, 338.6g of calcium chloride and 94.7g of hydrochloric acid are prepared into a solution A;
(2) solution A was added to 1560ml of sodium metaaluminate (Al) 2 O 3 100g/L), stirring uniformly, heating to 88 +/-2 ℃, and standing for 5 hours;
(3) adding 227.3g of cerous chloride pentahydrate, 20.4g of vanadyl oxalate and 555.6ml of aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) to a pH value of 8.7, filtering and washing;
(5) the filter cake is beaten and ZSM-5 and Y type molecular sieve 200g and hydrochloric acid (13 wt%) 47.5g are added, and then spray granulation, roasting, washing and drying are carried out, and the mixture is marked as CAT-5.
The catalyst prepared in the above example was subjected to hydrothermal aging treatment before use, and the evaluation results were as follows:
CAT-1 CAT-2 CAT-3 CAT-4 CAT-5
dry gas, wt% 3.87 3.33 4.01 3.01 2.45
Liquefied gas, wt% 13.68 11.56 15.12 12.01 9.82
C5 gasoline, wt.% 44.97 45.70 43.85 46.63 44.94
Diesel oil, wt% 15.87 18.71 14.98 18.12 22.13
Heavy oil wt% 3.09 3.89 2.07 4.00 5.01
Coke, wt% 18.25 16.81 19.97 16.23 15.65
Light harvesting, wt% 74.52 75.97 74.05 76.76 76.89
From the viewpoint of product distribution, the ideal light yield is obtained after the catalyst of the invention is used for treating waste materials.

Claims (6)

1. A preparation method of a catalyst for catalytic cracking waste materials comprises the following specific preparation steps:
(1) preparing solution A from magnesium chloride, calcium chloride and hydrochloric acid;
(2) adding the solution A into a sodium metaaluminate solution according to a certain proportion, uniformly stirring, heating and standing for 5-10 hours;
(3) adding cerous chloride, vanadyl oxalate and aluminum sulfate solution into the solution in the step (2) in sequence, and aging for 30 minutes;
(4) adding ammonia water into the solution in the step (3) to a pH value of 6-8, filtering and washing;
(5) and pulping the filter cake again, adding ZSM-5, a Y-type molecular sieve and a certain proportion of hydrochloric acid, spraying, granulating, roasting, washing and drying to obtain the title product.
2. The method according to claim 1, wherein in step (1) (2), the magnesium chloride, the calcium chloride and the sodium metaaluminate are added in a proportion of MgO: CaO: al (Al) 2 O 3 ＝1.95-2.05：0.9-1.1：1。
3. The process according to claim 1, wherein the hydrochloric acid is added in an amount of 0.45m as HCl in the step (1) MgO +0.1m CaO -0.4m Al2O3 。
4. The process according to claim 1, wherein in the step (3), the amount of cerium chloride added is 8 to 15% by weight in terms of cerium oxide, the amount of vanadyl oxalate added is 0.5 to 1.3% by weight in terms of vanadium pentoxide, and the amount of aluminum sulfate added is 5 to 10% by weight in terms of aluminum oxide.
5. The process according to claim 1, wherein the ZSM-5+ Y type molecular sieve is added in the step (5) in an amount of 20 to 35 wt% based on the dry weight of the titled compound.
6. The process according to claim 1, wherein the hydrochloric acid is added in the amount of (0.005-0.030) m in HCl in the step (5) Al2O3 。
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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113398982A (en) * 2021-06-04 2021-09-17 青岛惠城环保科技股份有限公司 Catalyst for preparing low-carbon olefin by catalytic cracking of waste plastic and preparation method thereof
CN113976098A (en) * 2021-11-09 2022-01-28 青岛惠城环保科技股份有限公司 Preparation method of alkaline catalyst for thermal cracking of waste plastics

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113398982A (en) * 2021-06-04 2021-09-17 青岛惠城环保科技股份有限公司 Catalyst for preparing low-carbon olefin by catalytic cracking of waste plastic and preparation method thereof
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