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A kind of preparation method of catalyst for catalytic cracking to increase production of propylene

A catalytic cracking and catalyst technology, which is applied in catalytic cracking, physical/chemical process catalysts, hydrocarbon cracking and hydrocarbon production, etc., can solve the problems of increasing oil slurry yield, reducing gasoline yield, and low specific surface area, so as to reduce hydrogen transfer Activity and the effect of increasing the yield of propylene

Active Publication Date: 2019-02-19
QINGDAO HUICHENG PETROCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The catalysts for increasing production of propylene disclosed in the prior art, one is to improve the conversion of light olefins through ZSM-5 metal modification, but at the same time, the yield of gasoline is significantly reduced, and the yield of oil slurry will be increased after the addition ratio is too high
In addition, the use of phosphor-aluminum glue and silica sol as a binder only considers its bonding performance, and its specific surface area is relatively low.

Method used

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  • A kind of preparation method of catalyst for catalytic cracking to increase production of propylene
  • A kind of preparation method of catalyst for catalytic cracking to increase production of propylene
  • A kind of preparation method of catalyst for catalytic cracking to increase production of propylene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] (1) 11.41 kg of ZSM-5 molecular sieve (silicon-aluminum ratio 25, dry basis content 92%) was mixed with 37.72 kg of deionized water, 11.53 kg of kaolin, and 11.03 kg of pseudo-boehmite, and stirred for 3 hours.

[0048] (2) Add 1.18 kg of 35 wt% hydrochloric acid to the slurry in (1), and stir for 45 minutes.

[0049] (3) Add 4.44 kg of water glass to the acidified solution and stir for 30 minutes until uniform.

[0050] (4) Add 0.51 kg of phosphoric acid to the slurry in (3), and stir for 25 minutes until uniform.

[0051] (5) Add 7.2 kg of alkaline silica sol to the above acidified slurry, stir for about 30 minutes until uniform, and obtain a catalyst slurry.

[0052] (6) The obtained catalyst slurry is spray-dried, washed with water and dried to obtain the catalyst SL-1.

Embodiment 2

[0054] (1) 13.33 kg of ZSM-5 molecular sieve (silicon-aluminum ratio 38, dry basis content 95%) was mixed with 33.53 kg of deionized water, 9.62 kg of kaolin, and 13.24 kg of pseudo-boehmite for 4 hours.

[0055] (2) Add 1.67 kg of 35 wt% hydrochloric acid to the slurry in (1), and stir for 50 minutes.

[0056] (3) Add 6.67 kg of water glass to the acidified solution and stir for 30 minutes until uniform.

[0057] (4) Add 0.61 kg of phosphoric acid to the slurry in (3), and stir for 20-30 minutes until uniform.

[0058] (5) Add 10.8 kg of alkaline silica sol to the above acidified slurry, stir for about 30 minutes until uniform, and obtain catalyst slurry.

[0059] (6) The obtained catalyst slurry is spray-dried, washed with water and dried to obtain the catalyst SL-2.

Embodiment 3

[0061] (1) 13.33 kg of ZSM-5 molecular sieve (silicon-aluminum ratio of 60, dry basis content of 90 wt%) was mixed with 41.70 kg of deionized water, 12.31 kg of kaolin, and 11.15 kg of pseudo-boehmite for 5 hours.

[0062](2) Add 0.93 kg of 35 wt% hydrochloric acid to the slurry in (1), and stir for 60 minutes.

[0063] (3) Add 2.22 kg of water glass to the acidified solution and stir for 30 minutes until uniform.

[0064] (4) Add 0.80 kg of phosphoric acid to the slurry in (3), and stir for 30 minutes until uniform.

[0065] (5) Add 3.6 kg of alkaline silica sol to the above acidified slurry and stir for about 30 minutes until uniform to obtain a catalyst slurry.

[0066] (6) The obtained catalyst slurry is spray-dried, washed with water and dried to obtain the catalyst SL-3.

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Abstract

The invention discloses a preparation method of a catalyst for increasing the production of propylene by catalytic cracking. The steps are as follows: (1) ZSM-5 molecular sieve, water, clay and pseudo-boehmite are mixed and slurried, and stirred evenly; (2) in step (1) (3) Add water glass solution to the acidified solution in step (2), stir and make it uniform; (4) acidify the slurry in step (3) for the second time, Stir evenly; (5) add alkaline silica sol to the acidified slurry in step (4); stir evenly; (6) spray and granulate the slurry in step (5), wash with water and dry. In the preparation method of the invention, the acidified pseudo-boehmite and water glass form a silica-alumina gel, which has a silica-alumina tetrahedral structure, high hydrothermal stability and medium and large pore distribution, and is suitable for heavy oil catalytic cracking reaction , the gasoline yield is reduced or not reduced, and the gasoline octane number can be improved. The use of silica sol as the binder reduces the hydrogen transfer activity of the catalyst, so that the olefin used as the raw material for propylene conversion will not be too saturated, and the propylene yield is improved.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a preparation method of a catalytic cracking catalyst for increasing the production of propylene. Background technique [0002] Propylene is an important chemical raw material, which mainly comes from the co-production of steam cracking to ethylene and the by-product of catalytic cracking process. In China, the catalytic cracking process occupies a dominant position in oil refining. Therefore, the production capacity of its by-product propylene accounts for more than 50% of the total market propylene. Therefore, increasing the propylene yield of catalytic cracking units is an important way to improve the comprehensive benefits of oil refineries. [0003] The addition of catalyst additives to increase the production of propylene in the catalytic cracking process is widely used due to the advantages of simple operation and flexible reaction. [0004] All catalyst man...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/40C10G11/05C07C4/06C07C11/06
CPCY02P20/52
Inventor 高明军张晓佳王鹏刘惠娟李凤叶红
Owner QINGDAO HUICHENG PETROCHEM TECH
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