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Catalytic cracking catalyst

A catalytic cracking, catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve problems such as complex solid-state ion exchange process

Pending Publication Date: 2021-08-31
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a rare earth-containing Y-type molecular sieve with a high exchange degree and unique pore size distribution characteristics for the complex process of improving the solid-state ion exchange degree of the rare earth Y-type molecular sieve described in the catalytic cracking catalyst in the prior art. Molecular Sieve Catalysts for Catalytic Cracking

Method used

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Examples

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Effect test

Embodiment 1

[0027] Example 1 illustrates the preparation of rare earth NaY molecular sieves in the catalytic cracking catalyst of the present invention.

[0028] Get 100g NaY molecular sieve (Sinopec Catalyst Company Changling Branch, 74.1% by weight loss on ignition, 89.3% crystallinity, the same below) and 1800g deionized water are mixed and beaten, and the concentration of 357gRE is added in 20ml 2 o 3 / L of rare earth chloride salt solution and 2g of ammonium chloride solid, stir well, raise the temperature to 70°C and adjust the pH value of the slurry to 4.5 with dilute hydrochloric acid, and stir at constant temperature for 1h. After filtering, washing with water, and drying, external pressure was applied and water was added, and it was roasted for 2 hours at 500°C, with an apparent pressure of 0.3Mpa and a 100% water vapor atmosphere to obtain a rare earth NaY molecular sieve sample, which was designated as PAY-1.

[0029] In the chemical composition of PAY-1, the rare earth oxide...

Embodiment 2

[0041] Example 2 illustrates the preparation of rare earth NaY molecular sieves in the catalytic cracking catalyst of the present invention.

[0042] Take 100g NaY molecular sieve and 1000g deionized water, mix and make slurry, add 16ml concentration to 357gRE 2 o 3 / L of rare earth chloride salt solution and 8g of ammonium chloride solid, stir well, raise the temperature to 60°C and adjust the pH value of the slurry to 4.0 with dilute hydrochloric acid, and stir at constant temperature for 1.5h. After filtering, washing with water, and drying, apply external pressure and add water, make it hydrothermally roasted at 430°C, superficial pressure 0.8Mpa, and 50% water vapor atmosphere for 0.5h to obtain a rare earth NaY molecular sieve sample, which is designated as PAY-2.

[0043] In the chemical composition of PAY-2 molecular sieve, the rare earth oxide is 8.2% by weight.

[0044] The BJH pore size distribution curve and XRD spectrum of PAY-2 are the same as figure 1 , 2 Ch...

Embodiment 3

[0055] Example 3 illustrates the preparation of rare earth NaY molecular sieves in the catalytic cracking catalyst of the present invention. .

[0056] Take 100g NaY molecular sieve and 2200g deionized water, mix and make slurry, add 24ml concentration to 357gRE 2 o 3 / L of rare earth chloride salt solution, stir well, heat up to 70°C, adjust the pH value of the slurry to 3.5 with dilute hydrochloric acid, and stir at constant temperature for 1 hour. After filtering, washing with water and drying, external pressure is applied and water is added, and it is hydrothermally roasted at 520°C, with an apparent pressure of 0.4Mpa and a 100% water vapor atmosphere for 1.5h to obtain a rare earth NaY molecular sieve sample, which is denoted as PAY-3 .

[0057] In the chemical composition of PAY-3, the rare earth oxide was 11.4% by weight.

[0058] The BJH pore size distribution curve and XRD spectrum of PAY-3 are the same as figure 1 , 2 Characteristics.

[0059] In the BJH pore...

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Abstract

The present invention provides a catalytic cracking catalyst and a preparation method thereof. The catalyst comprises, on the basis of dry base weight, 20-60 wt% of a rare earth-containing Y-type molecular sieve, 10-30 wt% of an inorganic oxide binder and 30-50 wt% of natural minerals. The rare earth Y-type molecular sieve is characterized in that (i) at least two kinds of mesoporous pore size distribution exist at the positions of 2-3 nm and 3-4 nm; (ii) in a BJH pore size distribution curve, the ratio of the peak area of pore size distribution of 2-3 nm to the peak area of pore size distribution of 3-4 nm is greater than 0.05. The catalytic cracking catalyst provided by the invention has excellent heavy oil conversion capability, higher gasoline yield and lower coke selectivity when being used for catalytic cracking of heavy oil.

Description

technical field [0001] The present invention relates to a catalytic cracking catalyst, and further, the present invention relates to a catalytic cracking catalyst with rare earth Y-type molecular sieve as an active component. Background technique [0002] Catalytic cracking is the most important production technology in today's oil refinery. The catalytic cracking unit is used to convert heavy oil and residual oil into gasoline, diesel and light gas components. In industry, the catalytic cracking unit must include two parts: reaction and catalyst high-temperature regeneration, so catalysts need to consider factors such as catalytic activity and selectivity. Compared with other types of molecular sieves, Y-type molecular sieves are more used in cracking reactions. As an active component of catalytic cracking catalyst, its main function in catalytic cracking catalyst is responsible for the production of molecular products in the gasoline range. [0003] The rare earth Y molec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/08B01J35/10C10G11/05
CPCB01J29/088C10G11/05B01J35/60B01J35/643B01J35/647B01J35/66Y02P20/52
Inventor 罗一斌王成强郑金玉舒兴田
Owner CHINA PETROLEUM & CHEM CORP
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