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Catalytic cracking catalyst with adjustable pore volumes and method for preparing catalytic cracking catalyst

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as process control difficulties

Pending Publication Date: 2018-07-10
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many cases, the disadvantage of this method is that it is difficult to control the process during the preparation process.

Method used

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  • Catalytic cracking catalyst with adjustable pore volumes and method for preparing catalytic cracking catalyst
  • Catalytic cracking catalyst with adjustable pore volumes and method for preparing catalytic cracking catalyst
  • Catalytic cracking catalyst with adjustable pore volumes and method for preparing catalytic cracking catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] (1) Add 1000g NaY molecular sieve (dry basis) into 7L deionized water, under stirring, add 350g ammonium chloride, adjust the pH value of the slurry to 3.50 with hydrochloric acid, stir at 85°C for 1h, then filter and wash, the obtained filter cake and 250mL of rare earth chloride and 2.2L of deionized water were mixed, stirred for 0.5h, spray-dried, and then hydrothermally roasted in a roaster under a 100% steam atmosphere at a roasting temperature of 600°C for 2 hours.

[0054] (2) Continue to mix the molecular sieve obtained in step (1) with ammonium chloride and water according to the weight ratio of molecular sieve (dry basis): ammonium salt: water = 1:0.3:7 to form a slurry. Stir under the conditions for 1 hour, add 1% (relative to the molecular sieve dry basis) cationic polyacrylamide, stir for 5 minutes, then add ammonium carbonate, the amount of ammonium carbonate added meets the weight ratio of ammonium carbonate: IIIB group elements (calculated as oxides) = 0...

Embodiment 2

[0058] (1) Except that no filter aid cationic polyacrylamide was added to the molecular sieve slurry after the ammonium salt exchange in step (2) of Example 1, other conditions were the same as in Example 1, and the molecular sieve Z-2 of the present invention was obtained.

[0059] (2) Add 600g (dry basis) of molecular sieve Z-2 into 1.2L of deionized water, and perform sand milling so that the median particle size D(v, 0.5) of the molecular sieve is less than 5 μm to obtain molecular sieve slurry Z-2J. Mix 425g of alumina sol, 1972g of kaolin, 943g of pseudoboehmite, and 4.9L of water for beating, add 50mL of hydrochloric acid, heat up to 50°C, stir for 1 hour, then cool down to 25°C, add molecular sieve slurry Z-2J, and stir for 15 minutes , then add 240g alkaline silica sol, 180mL water glass, the pH value of the final slurry is 3.57, continue to stir for 30 minutes, after homogeneous spray drying molding, roasting, washing, drying, the catalyst C-2 of the present invention...

Embodiment 3

[0070] (1) Add 1000g NaY molecular sieve (dry basis) into 10L deionized water, under stirring, add 300g ammonium sulfate, adjust the pH value of the slurry to 3.45 with hydrochloric acid, stir at 90°C for 1h, then filter and wash, the resulting filter cake is the same as 271g Yttrium nitrate and 2.4L deionized water were mixed to make NaY molecular sieve (dry basis): the weight ratio of yttrium compound (in terms of yttrium oxide) was 1:0.08, stirred for 0.5h, spray-dried, and heated in a roasting furnace under 100% water vapor Hydrothermal calcination was carried out under the atmosphere, the calcination temperature was 620° C., and the calcination time was 1.5 hours.

[0071] (2) Continue to mix the molecular sieve obtained in step (1) with ammonium sulfate and water according to the weight ratio of molecular sieve (dry basis): ammonium salt: water = 1:0.3:5 to form a slurry at 90°C and pH=3.5 Stir at low temperature for 1 hour, add 0.02% (relative to molecular sieve dry bas...

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Abstract

The invention discloses a catalytic cracking catalyst with adjustable pore volumes and a method for preparing the catalytic cracking catalyst. 100% of the catalytic cracking catalyst comprises, by weight, 10-55% of modified molecular sieves on a dry basis, 0-45% of auxiliary molecular sieves on a dry basis, 10-80% of clay on a dry basis, 5-40% of pseudo-boehmite on a dry basis, 0-40% of inorganicoxide on an oxide basis and 0-20% of binders on an oxide basis. The method for preparing the catalytic cracking catalyst includes dissolving the pseudo-boehmite in acid; mixing the pseudo-boehmite andother components of the catalytic cracking catalyst with one another to obtain slurry; adding alkaline substances into the ultimate slurry to allow a pH (potential of hydrogen) value of the slurry tobe in the range of 3.3-5.0; carrying out spray drying, curing and washing to obtain the catalytic cracking catalyst. The catalytic cracking catalyst and the method have the advantages that the pore volumes of the catalytic cracking catalyst can be adjusted, and the catalytic cracking catalyst is excellent in activity stability, cracking reaction selectivity and heavy metal pollution resistance.

Description

technical field [0001] The invention relates to a catalytic cracking catalyst, in particular to a catalytic cracking catalyst with adjustable pore volume, excellent activity stability and anti-heavy metal pollution performance. Background technique [0002] Crude oil is increasingly heavy and inferior. Efficient processing of heavy oil and blending of residual oil has become an urgent need for refiners to improve processing capacity and obtain higher profits. Catalytic cracking is the most important process of heavy oil processing. Due to its significant advantages such as high conversion efficiency of heavy oil, good product quality, non-hydrogenation and low operating pressure, it occupies a pivotal position in the process of processing heavy oil in refineries. It is the refinery's profit main source of . According to statistics, there are currently about 420 sets of catalytic cracking units in the world. The largest single set of catalytic cracking units has reached 10 m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10C10G11/05
CPCC10G11/05B01J29/088B01J2229/20B01J35/633
Inventor 张忠东孙书红郑云锋黄校亮杨芳张翠兰潘志爽袁程远刘明霞孙雪芹
Owner PETROCHINA CO LTD
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