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Catalytic cracking catalyst

A cracking catalyst and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems of low conversion rate of heavy oil, low gasoline yield, low rare earth content, etc.

Active Publication Date: 2008-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0017] Currently, ultra-stable Y molecular sieves in catalytic cracking catalysts have low rare earth content in crystals, and their heavy oil conversion rate and gasoline yield are low.

Method used

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preparation example Construction

[0035] The catalyst of the present invention can be prepared according to any existing method, for example, according to the method described in Chinese patent, CN1552801A with application number 200610112581.3. The preparation method comprises the steps of mixing the rare earth Y molecular sieve and the matrix, beating, spray drying, washing, filtering and drying. Spray drying, washing, filtering and drying are prior art, and the present invention has no special requirements.

[0036] The catalyst of the invention is suitable for catalytic cracking of hydrocarbon oil, especially for heavy oil catalytic cracking. The hydrocarbon oil is one or more of atmospheric residual oil, vacuum residual oil, vacuum gas oil, atmospheric gas oil, straight-run gas oil, propane light / heavy deasphalted oil and coker gas oil.

Embodiment 1

[0043] Take 500 grams of DASY2.0 (dry basis), add it to 5 liters of 0.2N oxalic acid aqueous solution and stir to mix evenly, raise the temperature to 95°C and keep it for 1 hour, then filter, wash with water, take out the filter cake, and place it in 5 liters of decationized water , add 160ml RECl 3 Solution (RE in solution 2 o 3 content is 319g / L), stirred, heated up to 92°C and kept for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a rare earth ultra-stable Y-type zeolite sample, which was recorded as A1, and its physical properties are shown in Table 2 .

[0044] Preparation of silica sol: 2 liters of water glass solution with a silica concentration of 155g / l and 1 liter of dilute acidified aluminum sulfate solution (free acid concentration is 148g / l, alumina content is 20g / l) are simultaneously introduced into the rapid mixer reaction , to obtain silica sol.

[0045] Preparation of kaolin and silica sol slurry: add 465 grams of kaolin...

Embodiment 2

[0049] Take 500 grams of DASY2.0 (dry basis), add it to 5 liters of 0.1N oxalic acid aqueous solution, stir to mix evenly, raise the temperature to 95°C and keep it for 1 hour, filter, wash with water, take out the filter cake, and place it in a 5 liter decationization water and add 160ml RE(NO 3 ) 3 Solution (solution concentration: in RE 2 o 3 Calculated as 319g / L), stirred, heated up to 92°C and kept for 1 hour, then filtered, washed, and the filter cake was dried at 120°C to obtain a rare earth ultra-stable Y-type zeolite sample, which was designated as A2, and its physical properties are shown in Table 2.

[0050] Silica sol preparation: 2 liters of silica concentration is the water glass solution of 155g / l and 1 liter of dilute acidified aluminum sulfate solution (free acid is 148g / l, aluminum oxide content is 20g / l) and introduces rapid mixer reaction simultaneously, to obtain silica sol.

[0051] Preparation of kaolin and silica sol slurry: add 465 grams of kaolin ...

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Abstract

A cracking catalyst comprises a rare earth ultra-stable Y-zeolite and a matrix, the matrix comprises a silicon oxide binder, the rare earth ultra-stable Y-zeolite is obtained by the method including the following steps: the ultra-stable Y-zeolite and the acid solution with the equivalent concentration of 0.01N to 2N are mixed within the temperature range of 20 DEG C to 100 DEG C in the liquid-solid weight ratio of 4 to 20; washing and filtration are carried out after stirring for 10 minutes to 300 minutes; rare earth salt solution is then added for carrying out the rare earth ion exchange; and washing, filtration and drying are carried out after the exchange. The catalyst of the invention is used for catalytic cracking of heavy oil, the conversion rate is high, the yield of gasoline is high and the coke yield is low.

Description

technical field [0001] The invention relates to a hydrocarbon oil catalytic cracking catalyst. Background technique [0002] With the increasing weight of catalytic cracking raw oil and increasingly stringent environmental regulations, catalytic cracking catalysts are required to improve the conversion of heavy oil and the ability to resist heavy metal pollution, while at the same time producing more low-carbon olefins and low-sulfur high-octane gasoline. The key to obtaining high-yield, high-octane gasoline is that the active component of the catalyst, that is, the rare earth high-silicon Y-type zeolite, can keep the crystal structure intact, have high thermal and hydrothermal stability, strong acidity and low acid density. In order to obtain the rare earth high silica zeolite with the above properties, the artificially synthesized NaY zeolite is usually subjected to appropriate ion exchange and ultra-stable modification treatment to reduce the aluminum content in the Y-typ...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J29/80C10G11/05
Inventor 周灵萍许明德朱玉霞田辉平严加松张蔚琳李峥唐立文龙军
Owner CHINA PETROLEUM & CHEM CORP
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