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Method for preparing in-situ crystallization type catalytic cracking catalyst

An in-situ crystallization and catalytic cracking technology, used in catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of low ammonium salt usage and pollution, improve reaction performance and alleviate ammonia nitrogen pollution problems, the effect of reducing production costs

Active Publication Date: 2013-08-14
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0014] The purpose of the present invention is to provide a method for preparing an in-situ crystallization type catalytic cracking catalyst. By optimizing the crystallization product exchange technology containing more than 50% molecular sieves, the rare earth utilization rate is high, the ammonium salt usage is low, and the reaction is selective. Good catalytic cracking catalyst, solve the problems of ammonia nitrogen pollution and clean production from the source, thereby reducing production costs

Method used

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  • Method for preparing in-situ crystallization type catalytic cracking catalyst
  • Method for preparing in-situ crystallization type catalytic cracking catalyst
  • Method for preparing in-situ crystallization type catalytic cracking catalyst

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preparation example Construction

[0053] (1) Preparation of crystallized products

[0054] Examples 1 to 9 and Comparative Examples 1 to 6 are preparations of in-situ crystallization products.

Embodiment 1

[0056] With 3000g of kaolin, based on the mass of kaolin, add 10% of water glass, 6% of pseudoboehmite, 1% of auxiliary agent polydimethyldiallylammonium chloride, and add deionized water to prepare a solid content of 33%. The mixed slurry obtains the kaolin spray microspheres of 3028g. A part of the microspheres was calcined at 700° C. for 1.5 hours to obtain partial earth microspheres PT-1.

[0057] Mix 100g of PT-1 partial earth microspheres with 1321ml of water glass, 470ml of 14wt% sodium hydroxide solution, and 138ml of directing agent. After stirring for 30 minutes, the mixed solution is put into a stainless steel reaction kettle and heated to 106°C for 12 hours of static crystallization. After the crystallization is completed, the white powder in the solution is removed by settling and washing, and then the filter cake is filtered, washed, and dried to obtain an in-situ crystallization product. As determined by X-ray diffraction, it contains 51% NaY zeolite, and the s...

Embodiment 2

[0059] With 3000g of kaolin, based on the mass of kaolin, add 6% of water glass, 4% of pseudoboehmite, 2% of auxiliary agent polydimethyldiallyl ammonium chloride, and add deionized water to prepare a solid content of 37%. The mixed slurry obtains the kaolin spray microspheres of 3110g. A part of the microspheres was calcined at 970° C. for 1.5 hours to obtain high soil microspheres GT-2, and the other part was calcined at 800° C. for 2 hours to obtain partial earth microspheres PT-2.

[0060] Take Gaotu microsphere GT-260g and 40g partial earth microsphere PT-2, mix it with 950ml water glass, 316ml14wt% sodium hydroxide solution, and 134ml guiding agent, stir for 30 minutes, and then put the mixture into a stainless steel reaction kettle , the temperature was raised to 96°C for static crystallization at a constant temperature for 26 hours. After the crystallization is completed, the white powder in the solution is removed by settling and washing, and then the filter cake is ...

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Abstract

Method for preparing in-situ crystallization type catalytic cracking catalyst The method comprises: (1) using kaolin as a raw material to prepare in-situ crystallization products: adding deionized water, a binder, a poly dimethyl diallyl ammonium chloride auxiliary agent into kaolin, obtaining kaolin spray microballoons by spray drying prepared mixed seriflux, roasting, mixing roasted microballoons with a guiding agent, and then obtaining the in-situ crystallization products with 50-70% of NaY zeolite after hydrothermal crystallization, filtration, washing with water and drying, wherein the adding amount of poly dimethyl diallyl ammonium chloride auxiliary is 1-10% of the quantity of kaolin; (2) exchanging and roasting the in-situ crystallization products: fully mixing the in-situ crystallization products and 0.01-3N acid solution in a liquid-solid mass ratio of 4-15:1 under 20-100 DEG C, regulating a pH value in a range of 2.8-6.0, treating for 10-100min, then adding one or more of ammonium salts, rare earth or phosphor for exchanging, and roasting, to obtain the in-situ crystallization type catalytic cracking catalyst.

Description

technical field [0001] The invention relates to a method for preparing an in-situ crystallization type catalytic cracking catalyst by using kaolin as a raw material, specifically a method for preparing an in-situ crystallization catalyst which can effectively improve the utilization rate of rare earths and reduce ammonia nitrogen pollution. Background technique [0002] Since the 1970s, the Engelhard Company of the United States proposed the in-situ crystallization technology of using kaolin as a raw material to simultaneously prepare active components and substrates. The catalyst prepared by this technology is called all-clay type or in-situ crystallization catalyst. Since its development, it has always had the characteristics of excellent anti-heavy metal performance, good activity and hydrothermal stability, and low wear index. [0003] However, with the increasingly heavy and inferior raw material oil of the FCC unit and the stringent environmental regulations, the in-si...

Claims

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Application Information

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IPC IPC(8): C10G11/05B01J29/08B01J32/00B01J37/30
Inventor 张莉赵晓争王宝杰熊晓云赵红娟胡清勋刘宏海潘志爽田爱珍王林
Owner PETROCHINA CO LTD
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