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Preparation method for heavy oil catalytic cracking catalyst

A technology for cracking catalysts and heavy oil catalysis, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc. It can solve the problems of small pore volume in catalysts, poor cracking ability of heavy oil, and easy clogging of substrates, etc., and achieve low cost of raw materials , prolong service life, good effect

Active Publication Date: 2016-07-20
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The outstanding problem in the process of preparing the catalyst according to the existing process or the improved process is that the unmodified aluminum sol or acidified pseudo-boehmite is directly added to the matrix slurry or the catalyst slurry, because aluminum ions mainly form Al 13 form exists, while Al 13 The aggregate particle size is small (1nm), which is easy to block the mesopores of the matrix or catalyst, resulting in small pore volume of the catalyst and poor heavy oil cracking ability
Patent CN101624536A adds alkali to the slurry to increase the pH value of the slurry, and then adds acid to reduce the pH value of the slurry, which can improve the stability of catalyst preparation, but the increase in pore volume is limited, and the operation is cumbersome

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Add 1140 grams of deionized water, 2078 grams of kaolin, 1656 grams of pseudoboehmite, 2174 grams of aluminum sol in the reaction kettle, add 230 grams of hydrochloric acid with a concentration of 35% after 10 minutes of beating, the pH value is 0.7, and stir for 1 hour Then add 116 grams of ammonia water, after mixing evenly, the pH value is 4.8, aging for 12 hours, stirring for 30 minutes, then adding 2060 grams of REUSY molecular sieves, 123 grams of ZSM-5 and Mix slurry composed of 2388 grams of deionized water, beating for 30 minutes, spray dry, and roast the obtained catalyst microspheres at 500°C for 0.5 hours, then add 8 times of deionized water, stir evenly, wash at 80°C for 15 minutes, filter and dry That is, the FCC catalyst prepared by the method of the present invention is obtained, which is denoted as A1.

[0049] Catalyst A1 has an attrition index of 1.7 and a pore volume of 0.40 mL.g -1 , Microreactive 81.

Embodiment 2

[0051] Add 2262 grams of deionized water, 1656 grams of pseudoboehmite, 2174 grams of aluminum sol, 1078 grams of montmorillonite, 968 grams of modified montmorillonite (montmorillonite roasted at 650 ° C for 2 hours) in the reaction kettle, and beat After 10 minutes, add 200 grams of hydrochloric acid with a concentration of 35%, and the pH value is 1.3. After stirring for 30 minutes, add 98 grams of alkaline silica sol. Colloid milling until 1937 grams of REUSY molecular sieve with an average particle size of less than 5 microns, 123 grams of ZSM-5 molecular sieve and 3510 grams of deionized water mixed molecular sieve slurry, after beating for 30 minutes, spray drying, and the obtained catalyst microspheres at 500 ° C Roast for 0.5 hours, then add 8 times of deionized water, stir evenly, wash at 80°C for 15 minutes, filter and dry to obtain the FCC catalyst prepared by the method of the present invention, and record it as A2.

[0052] The wear index of catalyst A2 is 1.5, t...

Embodiment 3

[0070] Add 700 grams of deionized water, 2174 grams of aluminum sol, 1280 grams of kaolin and 550 grams of halloysite in the reaction kettle, add 200 grams of hydrochloric acid with a concentration of 25% after beating for 10 minutes, mix well and add 1904 grams under stirring Pseudo-boehmite, the pH value after homogenization is 1.2, after stirring for 2 hours, add 98 grams of sodium metaaluminate, the pH value after mixing is 4.3, aging for 10 hours, stirring for 30 minutes, adding self-use colloid mill and grinding to 1860 grams of REUSY molecular sieve with an average particle size of less than 5 microns, 100 grams of ZSM-5 and 2905 grams of deionized water mixed molecular sieve slurry, spray-dried after 30 minutes of beating, the obtained catalyst microspheres were roasted at 500 ° C for 0.5 hours, and then added 8 times deionized water, stirred evenly, washed at 80°C for 15 minutes, filtered and dried to obtain the FCC catalyst prepared by the method of the present invent...

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PUM

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Abstract

The invention provides a preparation method for a heavy oil catalytic cracking catalyst.The preparation method includes the steps that pseudo-boehmite, clay, alumina sol and inorganic acid are added to a reaction still firstly and mixed to be uniform to form matrix slurry, the pH value of the matrix slurry is adjusted to be 0.5 to 2.0 through the acid adding amount, stirring is conducted for 0.5-2 h, then an alkaline medium is added to the matrix slurry to adjust the pH value to be 3.5-5.5, curing is conducted for 1-12 h, a molecular sieve is added, catalytic cracking catalyst slurry is formed in a homogenized mode, the obtained catalytic cracking catalyst slurry is subjected to spray drying, and then the catalyst is obtained.According to the preparation method, on the premise that the anti-abrasion strength of the catalyst is guaranteed, the hole volume of the catalyst can be increased, and the heavy oil cracking capacity of the catalyst can be improved.

Description

technical field [0001] The invention relates to a preparation method of an oil refining catalyst, more particularly to a preparation method of a heavy oil catalytic cracking catalyst. Background technique [0002] The semi-synthetic catalytic cracking catalyst is mainly composed of active component molecular sieve and matrix. The matrix includes two parts: support (such as kaolin) and binder (such as aluminum sol, silica sol). As the main material of catalytic cracking catalyst, the matrix accounts for above 50. In the early semi-synthetic catalysts, the matrix was only used as a carrier, which mainly provided physical properties such as better anti-wear performance and moderate bulk density for the catalyst. Since the 1990s, the heavy and inferior quality of crude oil in the world has become more and more serious. In order to make the heavy oil molecules close to the catalyst active center and realize the orderly cracking of heavy oil macromolecules, in addition to the gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G11/05
Inventor 高雄厚潘志爽谭争国张海涛李雪礼袁程远蔡进军段宏昌黄校亮丁伟郑云锋孙书红田爱珍
Owner PETROCHINA CO LTD
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