Heavy aromatics lightening catalyst as well as preparation method and application thereof

A technology for lightening heavy aromatics and catalysts. It is applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc. It can solve the problems of difficult separation of nano-zeolite, low production efficiency, and increased cost, and achieve good regeneration performance. , the effect of long reaction cycle

Active Publication Date: 2021-03-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of nano zeolite in the catalyst can reduce the diffusion resistance of molecules, but the use of nano zeolite will significantly increase the difficulty of catalyst preparation and economic cost. For example, nano zeolite is difficult to separate during production, resulting in low production efficiency and increased cost.

Method used

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  • Heavy aromatics lightening catalyst as well as preparation method and application thereof
  • Heavy aromatics lightening catalyst as well as preparation method and application thereof
  • Heavy aromatics lightening catalyst as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example Construction

[0019] Preferably, the preparation method of the catalyst of the present invention comprises the steps of:

[0020] (1) Pseudo-boehmite and acid solution are fully mixed and then peptized to obtain an aluminum sol with an alumina content of 8-16% by mass, adding hydrogen-type ZSM-5 and hydrogen-type EU-1 zeolite, and stirring evenly to obtain an aluminum sol containing The zeolite slurry is formed by dropping balls in an oil ammonia column, and the wet balls formed by the drop balls are dried at 30-100°C for 5-30 hours, activated at 500-650°C for 2-6 hours, and a spherical composite carrier is obtained.

[0021] (2) impregnating the spherical composite carrier prepared in step (1) with a compound solution containing VA group elements, drying and roasting at 500-700° C. to obtain a spherical catalyst, and then treating it with water vapor at 400-600° C. for 0.5-8 hours.

[0022] The step (1) of the above method is to prepare a small spherical composite carrier, and the mass rat...

example 1

[0038] The following examples prepare the catalyst of the present invention

[0039] (1) Preparation of small spherical composite carrier

[0040] Get 67.6 grams of pseudo-boehmite (produced by Sasol company, SB powder, the alumina content is 75% by mass), under stirring conditions, adding 270 grams of nitric acid aqueous solution with a concentration of 1.1% by mass, after peptizing for 2 hours, to obtain an aluminum sol with an alumina content of 10% by mass, adding 25 g SiO 2 / Al 2 o 3 Hydrogen ZSM-5 molecular sieve with a molar ratio of 50 and 25 grams of SiO 2 / Al 2 o 3 The hydrogen EU-1 molecular sieve with a molar ratio of 60 was stirred at a high speed for 3 hours to obtain a zeolite-containing slurry, and the solid content in the slurry was 20% by mass.

[0041] The above slurry was formed into drop balls in an oil ammonia column, the temperature of the drop ball was 15°C, the oil phase of the oil ammonia column was kerosene with a thickness of 10 cm, the thic...

example 2

[0045] Catalyst is prepared by the method of example 1, difference is (1) the hydrogen type ZSM-5 molecular sieve that adds in the aluminum sol is 32 grams, the hydrogen type EU-1 molecular sieve that adds is 18 grams, obtains that solid content is 20 mass % The zeolite-containing slurry was dropped, dried, and roasted to obtain a composite carrier e, which contained 32% by mass of hydrogen-type ZSM-5 molecular sieve, 18% by mass of hydrogen-type EU-1 molecular sieve and 50% by mass of γ-oxidized aluminum. The composition and α value of the catalyst E obtained after impregnating the composite carrier e with phosphoric acid solution, drying, calcining and water vapor treatment are shown in Table 1.

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Abstract

The invention discloses heavy aromatics lightening catalyst. The catalyst comprises a composite carrier and VA group element oxide with the content of 0.5-10.0% by mass calculated based on the composite carrier, and the composite carrier comprises 10-45% by mass of ZSM5 zeolite, 10-45% by mass of EU1 zeolite and 10-80% by mass of aluminum oxide. The catalyst is used for the non-hydrogen lighteningreaction of C9-C12 heavy aromatics, and can obtain higher light aromatic hydrocarbon yield and byproduct propane-rich high-quality liquefied gas.

Description

technical field [0001] The invention relates to a hydrocarbon conversion catalyst and a preparation method thereof, in particular to a heavy aromatic hydrocarbon lightening catalyst and a preparation method thereof. Background technique [0002] Heavy aromatics refer to C 9 The above aromatics mainly come from the following five sources: C 9 Heavy aromatics; Polyester raw material factory wide fraction C 10 Heavy aromatics; by-product of ethylene plant C 9 or C 10 Heavy aromatics; ethylene tar by-product of ethylene plant; heavy aromatics-coal tar by-product of high-temperature coal coking. With the increase of domestic oil refining and coal chemical capacity, the capacity of reforming unit and ethylene unit will continue to expand, and the output of heavy aromatics will continue to increase. For a long time, heavy aromatics resources have not been rationally utilized, except for a small amount used as solvent and extraction of C 9 and C 10 Except for monomeric aromat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/40B01J29/70C07C4/18C07C15/04C07C15/06C07C15/08C10G29/00
CPCB01J29/80B01J29/40B01J29/7023C07C4/18C10G29/00C10G2400/30C10G2400/26C10G2300/1096C07C15/04C07C15/06C07C15/08Y02P20/52
Inventor 王子健于中伟马爱增
Owner CHINA PETROLEUM & CHEM CORP
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