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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of poor olefin selectivity and low activity, and achieve excellent reaction performance, high mesopore volume, and increased ring-opening ratio and the effect of open-loop selectivity

Active Publication Date: 2020-06-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this catalyst is used for hydrocarbon oil conversion, has low activity and poor olefin selectivity, and is not suitable for catalytic cracking of hydrocarbon oil to prepare low-carbon olefins

Method used

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  • Catalytic cracking catalyst and preparation method thereof

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Experimental program
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Effect test

Embodiment approach

[0042] One embodiment, in the catalytic cracking catalyst provided by the present invention, the total specific surface area of ​​the mesoporous-rich IMF structure molecular sieve is 600-700 meters 2 / g, preferably 620-650 m 2 / g, mesopore specific surface area is 200-300 meters 2 / g, preferably 230-280 m 2 / g, the mesopore volume is 0.26-0.40 ml / g, preferably 0.28-0.35 ml / g.

[0043] According to the present invention, those skilled in the art are well aware that the total specific surface area, mesoporous specific surface area, micropore specific surface area and mesoporous pore volume can be measured by nitrogen adsorption BET specific surface area method, and the present invention can adopt national standard Measured in GB / T5816-1995, the mesopores generally refer to molecular sieve channels with a diameter greater than 2 nanometers and less than 100 nanometers (diameter is 2-100 nm), and micropores refer to molecular sieve channels with a diameter less than 2 nanometers...

preparation Embodiment 1

[0068] Filter the mother liquor from the crystallized IM-5 molecular sieve (produced by Changling Catalyst Factory, the same below), wash with water, filter and dry; roast the above-mentioned dried molecular sieve in air for 6 hours at a roasting temperature of 550°C to remove the A template agent to obtain a molecular sieve with a sodium-type IMF structure.

[0069] Add 10 times the weight of water and 0.5 times the weight of ammonium chloride to sodium-type IMF molecular sieves for the first ammonium exchange treatment. The exchange temperature is 90°C and the exchange time is 2 hours. After the exchange is completed, filter and take the above filter cake and repeat the exchange once. After filtering, washing and drying, an ammonium-exchanged molecular sieve with a sodium content of less than 0.2% by weight is obtained.

[0070] The ammonium-exchanged molecular sieve was hydrothermally calcined at 500° C. for 2 hours in 100% steam to obtain the hydrothermally calcined molecu...

preparation Embodiment 2

[0083] The crystallized IM-5 molecular sieve was filtered to remove the mother liquor, washed with water, filtered and dried; the above-mentioned dried molecular sieve was roasted in the air for 6 hours at a roasting temperature of 550°C to remove the template agent and obtain a sodium-type IMF structure molecular sieve.

[0084] Add 10 times the weight of water and 0.5 times the weight of ammonium chloride to the sodium-type IMF structure molecular sieve for the first ammonium exchange treatment. The exchange temperature is 70°C and the exchange time is 1h. After the exchange is completed, filter and take the above filter cake and repeat After one exchange, filter, rinse, and dry to obtain an ammonium-exchanged molecular sieve with a sodium content of less than 0.2% by weight.

[0085] The ammonium-exchanged molecular sieve was hydrothermally calcined at 600° C. for 2 hours in a 100% water vapor atmosphere to obtain a hydrothermally calcined molecular sieve.

[0086] Take 100...

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Abstract

The invention provides a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises: (a) 15-65% of natural minerals; (b) 10-60% of an oxide; and (c) 25-75% of a Y type molecular sieve and a mesopore-rich IMF-structure molecular sieve, wherein the total specific surface area of the mesopore-rich IMF-structure molecular sieve is more than 600 m<2> / g, the matrix areais greater than 200 m<2> / g, and the volume of the mesopores is greater than 0.26 ml / g. The preparation method comprises: carrying out mixing beating on the mesopore-rich IMF-structure molecular sieve, the Y type molecular sieve, the natural minerals and an inorganic oxide binder, and carrying out spray drying. According to the present invention, the catalytic cracking catalyst has the high low-carbon olefin yield in the propylene preparation through the catalytic cracking of petroleum hydrocarbons.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof Background technique [0002] For a long time, ethylene, propylene and butene have been the basic organic chemical raw materials for synthetic resin, synthetic fiber and synthetic rubber, among which propylene is an important raw material for the manufacture of petrochemical products after ethylene. At present, the largest source of propylene at home and abroad is the main by-product of thermal cracking to produce ethylene. The second largest source of propylene is almost all from FCC units, which provide about 30% of the demand. In the United States, FCC units provide petrochemical products for propylene. About half of the demand. [0003] Due to the rapidly growing demand for polypropylene, the demand for propylene in the petrochemical industry is faster than that for ethylene, and the construction of ethylene plants is limited by the demand for ethylene. Therefo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G11/05
CPCB01J29/084B01J29/088B01J29/70B01J29/7049B01J29/80B01J2029/081C10G11/05
Inventor 周翔田辉平刘宇键王丽霞罗一斌
Owner CHINA PETROLEUM & CHEM CORP
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