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Catalytic cracking catalyst for improving gasoline yield and preparation method thereof

A catalytic cracking and catalyst technology, used in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of small B/L acid ratio, small pore volume, low pore size, etc., and achieve high heavy oil conversion capacity, high Gasoline yield, effect of reducing liquefied gas and dry gas conversion

Active Publication Date: 2021-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] There is still a problem of high cost in the preparation of the existing amorphous silicon-aluminum materials, such as the use of organosilicon-aluminum compounds such as tetraethyl orthosilicate and aluminum isopropoxide as the source of silicon-aluminum
At the same time, the existing amorphous silicon-alumina materials still have problems such as small pore volume, low pore diameter, and small B / L acid ratio.

Method used

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  • Catalytic cracking catalyst for improving gasoline yield and preparation method thereof
  • Catalytic cracking catalyst for improving gasoline yield and preparation method thereof
  • Catalytic cracking catalyst for improving gasoline yield and preparation method thereof

Examples

Experimental program
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Effect test

specific Embodiment approach

[0036] 1. Raw materials

[0037] NaY zeolite directing agent, produced by Lanzhou Petrochemical Company Catalyst Factory;

[0038] Water glass, Si0 2 250g / L, produced by the Catalyst Factory of Lanzhou Petrochemical Company;

[0039] Kaolin, an industrial product of China Kaolinshi Company, with a solid content of 82.7%;

[0040] Pseudoboehmite, produced by Shanxi Aluminum Plant, with a solid content of 60.0%;

[0041] Aluminum sol, containing Al 2 o 3 23.7wt%, produced by the Catalyst Plant of Lanzhou Petrochemical Company;

[0042] RDSY molecular sieve, produced by Lanzhou Petrochemical Company Catalyst Factory, solid content 80.7%, Na 2 O content 1.2 wt%, RE 2 o 3 Content 2.1wt%;

[0043] REY molecular sieve, produced by Lanzhou Petrochemical Company Catalyst Factory, solid content 84.9%, Na 2 O content 1.1 wt%, RE 2 o 3 Content 13.4wt%;

[0044] Other reagents used purchased analytical reagents produced by Sinopharm Chemical Reagent Co., Ltd.

[0045] 2. Main...

Embodiment 1

[0055] Preparation of Medium and Large Porous Materials Containing Rare Earth

[0056] Take 26.8ml NaY zeolite directing agent and mix with 51.2ml 250g / l water glass evenly, add water to dilute to Si0 2 The concentration is 40g / L (as Si0 2 , the same below), after stirring evenly, neutralize with 6mol / L sulfuric acid solution at 60°C to form a gel for aging, the pH value of the gel is 8, after adding the acid, continue to age at a constant temperature for 1.5h under stirring conditions; after the aging is completed, add 6mol / L sulfuric acid to pH=4, then slowly add 9.9ml 90g / L aluminum chloride solution (A1 2 0 3After the addition, continue to stir for 2 hours; add 10wt% sodium hydroxide solution to adjust the pH value to 7, and age at a constant temperature for 1.5 hours under stirring at 90°C. After the obtained product is filtered and washed, the resulting solid precipitate is ion-exchanged according to ammonium nitrate: solid precipitate (dry basis): water = 1:0.5:8 to ...

Embodiment 2

[0063] Preparation of Medium and Large Porous Materials Containing Rare Earth

[0064] Take 22.23ml of NaY zeolite directing agent and 40.89ml of tetraethyl orthosilicate, mix evenly, add water to dilute to Si0 2 The concentration is 50g / L, after stirring evenly, neutralize with 5mol / L nitric acid solution at 80°C to form a gel for aging, the pH value of the gel is 9, after adding acid, continue aging at constant temperature for 1h under stirring conditions; after aging, add 5mol dropwise / L nitric acid until the pH value = 6, then slowly add 4.76ml 90g / L aluminum nitrate solution under stirring conditions, and continue stirring for 1.5h after the addition; add 10wt% potassium hydroxide solution to adjust the pH value = 9, and stir at 95°C Aging at constant temperature for 2h. After the resulting product is filtered and washed, the resulting solid precipitate is ion-exchanged to remove sodium ions according to ammonium nitrate:solid precipitate (dry basis):water=1:0.7:9, and ...

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Abstract

The invention provides a catalytic cracking catalyst for increasing gasoline yield and a preparation method thereof. The catalytic cracking catalyst for increasing gasoline yield has 80-50 parts of substrate, preferably 75-60 parts based on 100 parts of catalyst mass composition. 1 to 20 parts, preferably 2 to 12 parts, of medium and macroporous silicon-aluminum materials containing rare earths; 20 to 50 parts, preferably 25 to 40 parts, of molecular sieves, wherein the molecular sieves include two types of Y-type molecular sieves, respectively, the rare earth content is 8 ‑18% REY and 1‑3% RDSY, the ratio of REY to RDSY is 1:3‑2:1. The catalyst of the invention has higher heavy oil conversion capacity and gasoline yield.

Description

technical field [0001] The invention relates to a preparation method of a catalytic cracking catalyst, in particular to a catalytic cracking catalyst for improving gasoline yield and a preparation method thereof. Background technique [0002] Gasoline is one of the most used light petroleum products. Catalytic cracking is the main production device of gasoline. About 75% of gasoline in my country is catalytic gasoline. Catalytic cracking is a catalytic process, and the catalyst plays a central role in FCC. The difference in its physical and chemical properties and acid distribution will affect the conversion rate of raw materials and product selectivity. [0003] Al-Khattaf studies (Applied Catalysis A: General 231 (2002) 293–306) show that when the conversion is fixed, the gasoline yield increases gradually with the decrease of the unit cell size of the Y-type zeolite. Al-Khattaf found (Ind. Eng. Chem. Res. 1999, 38, 1350-1356) that under the same conversion rate, the use ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/80C10G11/05
CPCB01J29/084B01J29/088B01J29/80C10G11/05C10G2400/02
Inventor 熊晓云高雄厚胡清勋赵红娟田爱珍王久江刘宏海张莉赵晓争王宝杰
Owner PETROCHINA CO LTD
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