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Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve the problems of low activity and poor selectivity of olefins, so as to improve the reaction activity, increase the yield of ethylene and propylene, Inhibition of non-selective side effects

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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
  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

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preparation example Construction

[0045] In the catalytic cracking catalyst preparation method provided by the present invention, the preparation method of the phosphorus-containing and metal-loaded IMF structure molecular sieves comprises: a, desiliconizing the sodium-type IMF structure molecular sieves in an alkaline solution to obtain desiliconization molecular sieves; b. Exchanging the desiliconized molecular sieve obtained in step a with ammonium to obtain an ammonium-exchanged molecular sieve; wherein, the sodium content of the ammonium-exchanged molecular sieve is less than 0.2% by weight in terms of sodium oxide and based on the total dry weight of the ammonium-exchanged molecular sieve ; c, the ammonium exchanged molecular sieve obtained in step b is dealuminated in a complex acid dealumination agent solution composed of fluosilicic acid, organic acid and inorganic acid, and after filtering and washing, the dealuminated molecular sieve is obtained; d, After the dealuminated molecular sieve obtained in ...

preparation Embodiment 1

[0077] The crystallized IM-5 molecular sieve (produced by Changling Catalyst Factory of Changling Branch of Sinopec Catalyst Co., Ltd. for short) 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, and the roasting temperature 550°C to remove the template agent therein; take 100g (dry basis) of the above-mentioned molecular sieve and add it into 1000g of NaOH solution with a concentration of 2.4% by weight, heat up to 65°C, react for 30min, and then rapidly cool to room temperature, filter, and wash until The filtrate is neutral. Then, add 800g water to the filter cake to make a slurry, add 40g NH 4 Cl, heated to 75°C, exchanged for 1h, to Na 2 O content is lower than 0.2% by weight, filters, washes, and obtains molecular sieve filter cake; Get above-mentioned molecular sieve filter cake 50g (dry basis) and add water and be mixed with the molecular sieve slurry of solid ...

preparation Embodiment 2

[0093] Filter the mother liquor from the crystallized IM-5 molecular sieve (produced by Changling Catalyst Factory), wash with water, filter and dry; roast the above-mentioned dried molecular sieve in air for 8 hours at a roasting temperature of 550°C to remove the templating agent therein Take 100g (dry basis) of the above-mentioned molecular sieve and add it to 1500g 2.3% by weight of NaOH solution, heat up to 60°C, react for 45min, cool to room temperature rapidly, filter, and wash until the filtrate is neutral. Then, add 800g water to the filter cake to make a slurry, add 40g NH 4 Cl, heated to 75°C, exchanged for 1h, to Na 2 O content is lower than 0.2% by weight, filters, washes, obtains molecular sieve filter cake; Get above-mentioned molecular sieve filter cake 50g (dry basis) and add water and be mixed with the molecular sieve slurry of solid content 10% by weight, add citric acid 4g in stirring, then 10g sulfuric acid ( Mass fraction 10%) and 45g fluosilicic acid (m...

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Abstract

The invention relates to a catalytic cracking catalyst and a preparation method thereof, wherein the catalyst comprises 15-65% of natural minerals, 10-30% of an oxide, and 25-75% of a Y-type molecularsieve and a phosphorus-containing and supported metal-containing IMF structural molecular sieve, the Al distribution parameter D of the phosphorus-containing and supported metal-containing IMF structural molecular sieve is more than or equal to 0.6 and is less than or equal to 0.85, the volume of mesopores accounts for 50-80% of the total volume of pores, the volume of pores with a pore size of 2-20 nm accounts for more than 85% of the total volume of mesopores, the strong acid accounts for 50-80%, a ratio of an acid B to an acid L is 7-30, the phosphorus content is 0.1-15 wt%, and the supported metal content is 0.1-5 wt%. The preparation method comprises: carrying out mixing beating on the phosphorus-containing and supported metal-containing IMF structural 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, with the application of the catalytic cracking catalyst in catalytic cracking of petroleum hydrocarbons, the yield of low-carbon olefins is high.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst and a preparation method thereof Background technique [0002] Propylene is an important raw material used to make 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. Therefore, a large increase in FCC propylene will be used to meet the increase in demand. Since the 1980s, catalysts containing shape-selective molecular sieves ZSM-5 have been put into ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C07C11/04C07C11/06C07C4/06
CPCB01J29/80C07C4/06C07C11/04C07C11/06Y02P20/52
Inventor 田辉平周翔刘宇键王丽霞刘俊张杰潇
Owner CHINA PETROLEUM & CHEM CORP
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