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Catalyst for producing propylene by catalytic cracking of naphtha, preparation method thereof, and method for producing propylene by catalytic cracking of naphtha

A catalytic cracking and catalyst technology is applied in the catalyst field of naphtha catalytic cracking to produce propylene and naphtha catalytic cracking to produce propylene, which can solve the problems of small propylene output and achieve the effect of improving yield

Active Publication Date: 2018-11-30
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a catalyst for producing propylene by catalytic cracking of naphtha and a preparation method thereof and a method for producing propylene by catalytic cracking of naphtha in order to overcome the problem of small propylene production in the prior art when catalytic cracking of naphtha is used to produce propylene

Method used

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  • Catalyst for producing propylene by catalytic cracking of naphtha, preparation method thereof, and method for producing propylene by catalytic cracking of naphtha

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Embodiment approach

[0031] According to a preferred embodiment of the present invention, the molecular sieve of the TON structure is a mixture of ZSM-22 zeolite and NU-10 zeolite, and the weight ratio of the two is 2-5:1; the molecular sieve of the MTT structure is ISI- A mixture of 4 zeolite and ZSM-23 zeolite, the weight ratio of the two is 2-5:1.

[0032] In the present invention, the silicon-aluminum atomic molar ratio (Si / Al) of the first molecular sieve may be 0.1-100:1; preferably 30-80:1.

[0033] According to the present invention, preferably, the opening diameter of the pores of the second molecular sieve is 0.65-0.7 nanometers. More preferably, the second molecule is selected from at least one molecular sieve having a structure of AET, AFR, AFS, AFI, BEA, BOG, CFI, CON, GME, IFR, ISV, LTL, MEI, MOR, OFF and SAO kind. Particularly preferably, the second molecular sieve is at least one of Beta, SAPO-5, SAPO-40, SSZ-13, CIT-1, ITQ-7, ZSM-18, mordenite and gmelinite.

[0034] In the pre...

Embodiment 1

[0075] This example is used to illustrate the preparation method of the catalyst provided by the present invention and the method for producing propylene by catalytic cracking of naphtha.

[0076]Prepare the catalyst. Mix 56.2 grams of ZSM-22 molecular sieve (Nanjing Jicang Nano Technology Co., Ltd., Si / Al molar ratio = 30:1) with 56.2 grams of deionized water, and wet ball mill to form a molecular sieve slurry. The particle diameter of the molecular sieve is d 90 = 10 microns, solids content 50% by weight. Add 28.4 grams of aluminum sol (containing 22% by weight of alumina, produced by Sinopec Catalyst Qilu Branch) in the slurry, stir for 10 minutes, add 1.5 grams of polyethylene glycol solution (the weight percent of polyethylene glycol solution is 2% by weight), Stir for 20 minutes to obtain the first active component coating slurry 1.

[0077] The first active component coating slurry 1 is coated with a cordierite honeycomb carrier (the carrier pore density is 100 holes / ...

Embodiment 2

[0082] This example is used to illustrate the preparation method of the catalyst provided by the present invention and the method for producing propylene by catalytic cracking of naphtha.

[0083] (1) Preparation of catalyst.

[0084] Mix 32 grams of ZSM-23 molecular sieve powder (Shanghai Zhuoyue Chemical Co., Ltd., Si / Al molar ratio = 50:1)) with 20 grams of deionized water, and wet ball mill to form a slurry. The particle diameter of the molecular sieve in the slurry is d90 = 8 microns; Add 150 grams of peptized pseudo-boehmite (containing 18% by weight of alumina, the pH value is 2.8, the product of Sinopec Catalyst Qilu Branch Company) in the slurry, and stir for 15 minutes; add 3.2 grams of polyacrylic acid solution (polyacrylic acid solution weight percent 1% by weight), the polyacrylic acid solution was added in an amount of 10% by weight of the molecular sieve, and stirred for 30 minutes to obtain the first active component coating slurry 1.

[0085] The first active...

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Abstract

The invention provides a catalyst for producing propylene by the catalytic cracking of naphtha and a preparation method thereof. The catalyst comprises a regular structure carrier and an active ingredient coating distributed on the inner surface and / or the outer surface of the regular structure carrier; a molecular sieve comprises a first molecular sieve and a second molecular sieve, wherein the first molecular sieve is a molecular sieve with a ten-membered cyclic one-dimensional elliptic porous structure; the second molecular sieve is a molecular sieve with a twelve-membered cyclic porous structure. The invention further provides a method for producing propylene by the catalytic cracking of naphtha. With adoption of the catalyst provided by the invention, the yield of propylene can be increased, and the ratio of obtained propylene to ethylene is 2 or above.

Description

technical field [0001] The present invention relates to a catalyst for producing propylene by catalytic cracking of naphtha and a preparation method thereof and a method for producing propylene by catalytic cracking of naphtha, in particular to a catalyst for producing propylene by catalytic cracking of naphtha, a catalyst for preparing naphtha A method for cracking a catalyst for producing propylene and the prepared catalyst, and a method for producing propylene by catalytic cracking of naphtha. Background technique [0002] Propylene is one of the most widely used basic organic chemical raw materials, mainly used in the production of polypropylene, cumene, acrylonitrile, acrylic acid, etc. At present, propylene mainly comes from ethylene cracking units in petrochemical plants and catalytic cracking units in refineries. With the rapid growth of global demand for propylene, the output of traditional production processes is difficult to meet the demand, so the development of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C07C11/06C07C11/04C07C4/06
CPCY02P20/52
Inventor 田辉平孙言王鹏徐志成
Owner CHINA PETROLEUM & CHEM CORP