Catalyst of catalyzing, cracking for reducing sulfur content in gasoline and preparation process thereof

A catalytic cracking and catalyst technology, applied in catalytic cracking, cracking, petroleum industry, etc., can solve the problems of reducing the sulfur content of gasoline, increasing the consumption of catalysts, and poor stability of additives or catalysts

Inactive Publication Date: 2005-03-23
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing technologies have reduced the sulfur content of FCC gasoline to varying degrees, but the common disadvantage is that the prepared additives or catalysts have poor stability and are easily deactivated during use, thereby increasing the consumption of catalysts
[0005] Patent CN1232862A uses kaolin in-situ crystallization to synthesize Y-type molecular sieve, which has very good catalytic cracking function, but does not have the function of reducing gasoline sulfur content

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Add water to 10Kg (dry basis) of the original kaolin to make a slurry with a solid content of 35%, and add 2.5Kg of sodium silicate as a dispersant for spray molding to obtain 8.5Kg of spray microspheres. The sprayed microspheres were calcined in a muffle furnace at 940° C. for 3 hours to obtain calcined microspheres. In the stirring state, sodium silicate 500ml, lye 670ml, zeolite directing agent (containing 11.65% SiO 2 , 1.32% Al 2 o 3 , 12.89% Na 2 (2) 125ml, 200ml of deionized water, and 1200g of roasted microspheres were put into a stainless steel reactor, and the temperature was raised to 90° C. and crystallized at a constant temperature for 24 hours. After the crystallization is completed, the mother liquor is removed by filtration, and the filter cake is washed and dried to obtain crystallized product microspheres. As determined by X-ray diffraction, the crystallization product microspheres contained 23% NaY zeolite, and the zeolite silicon-aluminum ratio (...

Embodiment 2

[0046] All reaction raw materials are the same as in Example 1. Under stirring, sodium silicate 450ml, lye 706ml, guiding agent 160ml, deionized water 160ml, copper nitrate 100g, ferrous chloride 20g, zirconium chloride 12g, and roasted microspheres 1100g Put it into a stainless steel reactor, raise the temperature to 90°C and conduct crystallization at constant temperature for 20 hours. X-ray diffraction determined that the crystallized product contained 19% NaY zeolite, and the zeolite silicon-aluminum ratio was 5.2. The crystallized product microspheres were subjected to ion exchange and high-temperature calcination treatment in the same manner as in Example 1, except that: three cross-linked rare earths / one roasting material=3. The final microsphere sodium oxide content is 0.75%, and the rare earth oxide content is 2.5%, and the catalyst B of the present invention is obtained.

Embodiment 3

[0048] Adding water to 10Kg (dry basis) former kaolin to make a slurry with a solid content of 20%, and adding 0.2Kg sodium hydroxide, 0.2Kg sodium pyrophosphate, and 0.1Kg sodium hexametaphosphate as a dispersant, sprayed into microspheres, and obtained 8Kg of spray microspheres. A part of the sprayed microspheres was calcined in a muffle furnace at 950°C for 1 hour to obtain calcined microspheres A, and a part was calcined at 700°C for 1 hour to obtain calcined microspheres B. While stirring, put 3000ml of sodium silicate, 900ml of lye, 90ml of zeolite directing agent, 200ml of deionized water, and 500g of roasted microspheres A and B into a stainless steel reactor in sequence, raise the temperature to 90°C and crystallize at constant temperature for 24 hours. After the crystallization is completed, the mother liquor is removed by filtration, and the filter cake is washed and dried to obtain crystallized product microspheres. As determined by X-ray diffraction, the crystall...

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Abstract

The invention is a catalytic cracking catalyst to reduce sulfur content of gasoline and its preparing method, synthesis gama-type molecular sieve by kaoline in-situ crystallization and making exchange sodium reduction or / and rare-earth ion exchange processing to prepare it, and its characteristic: the weight percent of sodium oxide contained in it is less than 0.75%, the ratio of zeolite to silica-alumina is above 4.5, and it adds one or several of the sourish metal elements: Cu, Zn, Fe, Al, Ni, Zr, Sn, Ga, Ti and V in weight percent of 0.1-10%. It has good zeolite dispersivity and excellent hydrothermal stability, good catalytic cracking property, and excellent function of reducing sulfur content of gasoline. It can be used by mixing with routine FCC catalyst and also be singly applied in the catalytic cracking process course.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst with the function of reducing the sulfur content of gasoline and a preparation method thereof, more specifically, a catalytic cracking catalyst containing in-situ crystallization molecular sieve prepared with kaolin as a raw material and capable of reducing the sulfur content of gasoline and its preparation method. The preparation method, the catalyst can be mixed with common FCC catalysts in a certain proportion, and can also be used alone in the catalytic cracking process. Background technique [0002] With the increasingly stringent environmental protection regulations, countries have successively formulated new standards for gasoline, especially limiting the content of sulfur and olefins. Catalytic cracking is one of the main means of petroleum processing, and FCC gasoline accounts for more than 80% of the total finished gasoline. Therefore, reducing the sulfur content of catalytic cracking gas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G11/05
Inventor 孙书红庞新梅高雄厚刘宏海王宝杰刘从华
Owner PETROCHINA CO LTD
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