Olefin cracking catalyst, preparation method thereof and olefin cracking method

A technology for cracking catalysts and olefins, which is applied in the direction of hydrocarbon cracking to produce hydrocarbons, molecular sieve catalysts, chemical instruments and methods, etc. It can solve the problems of short catalyst life, difficulty in improving the selectivity of ethylene and propylene, unfavorable catalyst regeneration, etc.

Pending Publication Date: 2020-08-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem solved by the present invention is firstly to provide a kind of olefin cracking catalyst and its preparation method, the catalyst prepared by this method can be used for the catalytic cracking of olefins in light olefins, especially catalysis or coking gasoline fraction, and can solve The catalysts used in the prior art are difficult to improve the selectivity of ethylene and propylene, and the catalyst life is short
[0013] The present invention also provides a method for catalytic cracking of olefins, using the catalyst of the present invention, which solves the problems in the prior art that fluidized bed is required for catalytic cracking, which is not conducive to catalyst regeneration and high process cost

Method used

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  • Olefin cracking catalyst, preparation method thereof and olefin cracking method
  • Olefin cracking catalyst, preparation method thereof and olefin cracking method
  • Olefin cracking catalyst, preparation method thereof and olefin cracking method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] (1) Alkali treatment of HZSM-5 molecular sieve and USY molecular sieve

[0075] Add HZSM-5 molecular sieve to 0.5mol / L NaOH solution, so that the mass ratio of HZSM-5 molecular sieve:NaOH solution is 1:6, and a mixed slurry is obtained. Heat the mixed slurry in a water bath to about 80°C, maintain the temperature for about 2 hours, filter out the HZSM-5 molecular sieve filter cake by suction filtration, and wash until neutral. The obtained molecular sieve filter cake was dried in an oven at 110° C. for 12 hours, and then baked in a muffle furnace at 550° C. for 4 hours.

[0076] The calcined HZSM-5 molecular sieve was treated with 0.1M NH 4 NO 3 Solution processing. HZSM-5 molecular sieve: NH 4 NO 3 The mass ratio of the solution is 1:6, heated in a water bath to about 80°C, and maintained for 2 hours, and the ammonium-exchanged HZSM-5 molecular sieve filter cake is filtered out by suction filtration, washed to neutrality, and the NH 4 NO 3 Solution (0.1M) treatm...

Embodiment 2

[0101] The catalyst was prepared according to the same process as in Example 1, except that the composition of the composite molecular sieve included HZSM-5, USY and SAPO-34.

[0102] The method of alkali treatment of HZSM-5 molecular sieve and USY molecular sieve is the same as that in Example 1.

[0103] Add SAPO-34 molecular sieve to 0.05mol / L HNO 3 In solution, SAPO-34 molecular sieve: HNO 3 The solution mass ratio is 1:6 to obtain a mixed slurry. The mixed slurry water bath was heated to about 80° C. and maintained at this temperature for about 2 hours. Filter out the SAPO-34 molecular sieve filter cake by suction filtration, and wash until neutral. The molecular sieve filter cake was dried in an oven at 110° C. for 2 hours, and then baked in a muffle furnace at 550° C. for 4 hours.

[0104] Mix the alkali-treated HZSM-5 molecular sieve, alkali-treated USY molecular sieve and acid-treated SAPO-34 molecular sieve in a ratio of 5:2:1 to obtain HZSM-5 / USY / SAPO-34 composite...

Embodiment 3

[0108] The catalyst was prepared according to the same process as in Example 1, except that the composition of the composite molecular sieve included HZSM-5 and β molecular sieve.

[0109] All the other operations were the same as in Example 1 to obtain catalyst C.

[0110] The catalytic effect evaluation experiment of catalyst C is the same as in Example 1, and the results are shown in Table 1.

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Abstract

The invention provides an olefin cracking catalyst, a preparation method thereof and an olefin cracking method. The preparation method of the catalyst comprises the following steps: mixing at least two of the pretreated SAPO-34 molecular sieves, ZSM-5 molecular sieves, beta molecular sieves and USY molecular sieves according to a mass ratio of (0-30): (50-80): (0-30): (0-50) to obtain composite molecular sieves, respectively performing alkali treatment on the ZSM-5 molecular sieves, the beta molecular sieves and the USY molecular sieves, and performing acid treatment on the SAPO-34 molecular sieves; performing steps of silanization treatment and nonmetal and metal modification treatment on the composite molecular sieve, and finally obtaining the olefin cracking catalyst by mixing a matrixand a binder. The invention also provides an olefin cracking method using the catalyst. The catalyst provided by the invention has a porous structure and suitable acid distribution, has high olefin conversion rate and high ethylene and propylene yield in the reaction, and has long service life.

Description

technical field [0001] The invention relates to petrochemical technology, in particular to a method for preparing an olefin cracking catalyst, a catalyst prepared by the method, and an olefin cracking method implemented by using the catalyst. Background technique [0002] Ethylene is the basic organic raw material of petrochemical industry, about 75% of petrochemical products are produced from ethylene. In terms of synthetic materials, it is widely used in the production of polyethylene, vinyl chloride and polyvinyl chloride; in organic synthesis, it is widely used in the synthesis of various basic organic synthesis raw materials such as ethanol, ethylene oxide and ethylene glycol. In fact, ethylene production has become a symbol to measure the development level of a country's petrochemical industry. [0003] Propylene is an important organic petrochemical basic raw material next to ethylene. It is mainly used to produce polypropylene, phenol, acetone, etc. Other uses inclu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J29/85B01J35/10C07C4/06C07C11/04C07C11/06
CPCB01J29/005B01J29/80B01J35/10C07C4/06B01J29/40B01J29/85B01J29/7007B01J29/084B01J2229/32B01J2229/38B01J2229/18B01J29/405B01J29/7057B01J29/088C07C11/04C07C11/06Y02P20/52
Inventor 赵亮孙海玲高金森张宇豪张彬瑞郝天臻孟庆飞李德忠徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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