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Preparation method of catalytic cracking catalyst

A catalytic cracking and catalyst technology, applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problems that the gas phase ultra-stable process is difficult to industrialize, increase production costs and environmental protection costs, and endanger the health of operators. Achieve the effects of high crystallinity, high production efficiency, and low labor intensity

Active Publication Date: 2012-05-16
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And, in the method of above-mentioned prior art, in order to guarantee the high silicon content of the obtained molecular sieve, generally all make SiCl 4 far excess, excess SiCl 4 Undoubtedly increased production costs and environmental protection costs
On the other hand, the above-mentioned methods all require very complicated manual operations, such as: manual loading, manual unloading and long-term purging of pipelines after the completion of the reaction, which not only bring about high labor intensity but also low production efficiency. problems, moreover, molecular sieve dust and excess SiCl during loading and unloading 4 It also causes serious environmental pollution and seriously endangers the health of operators.
Therefore, the above-mentioned tank-type gas-phase ultra-stable process is difficult to carry out industrial production

Method used

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  • Preparation method of catalytic cracking catalyst
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  • Preparation method of catalytic cracking catalyst

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preparation example Construction

[0020] According to the preparation method of the catalytic cracking catalyst provided by the present invention, the conditions of the contact include that the solid content of the molecular sieve is preferably greater than 98% by weight, and the solid content of the molecular sieve is the weight ratio of the molecular sieve after high-temperature roasting to the weight before roasting, i.e. Solid content of molecular sieve = 100% - water content of molecular sieve; SiCl 4 The weight ratio to molecular sieve is preferably 0.01-1:1, more preferably 0.05-0.60:1; molecular sieve and gas phase SiCl 4The contact temperature is 250-700°C, more preferably 300-650°C; the flow rate of the mixture flow is such that SiCl 4 The residence time of the molecular sieve in the reactor is from 10 seconds to 100 minutes, preferably from 1 minute to 20 minutes. The flow velocity of the molecular sieve flowing with the gas in the mixture flow is preferably 0.015-3 m / s, more preferably 0.03-3 m / s,...

Embodiment approach

[0036] According to a preferred embodiment of the present invention, the pipe body 13 further includes a second inclined section 133, one end of the second inclined section 133 is connected to the other end of the vertical section 132, and the feeding port Located at the other end of the second inclined section 133 . This can prevent the molecular sieve solid material from flowing too fast under the action of gravity, and increase the contact reaction time between the reaction materials.

[0037] Further preferably, the position of the feed inlet is higher than the position where the second inclined section 133 is connected to the vertical section 132, so that the molecular sieve solid material can directly enter the second inclined section 133 by its own gravity. , and then can be further transported under the carrier gas.

[0038] The included angle between the second inclined section 133 and the vertical section 132 can be 10-90°, preferably 30-80°, that is, when the verti...

Embodiment 1

[0054] Made of industrial grade stainless steel with a thickness of 3mm NiCr18Ti figure 2 The shown equipment for preparing molecular sieves, wherein the pipe body 13 of the tubular reactor 1 is composed of a first inclined section 131, a vertical section 132 and a second inclined section 133, the length of the first inclined section 131 is 20 meters, and the diameter is 0.8 The length of the vertical section 132 is 40 meters, and the diameter is 0.8 meters. The length of the second inclined section 133 is 15 meters, and the diameter is 0.8 meters. The vertical section 132 is perpendicular to the horizontal plane, and the axis of the first inclined section 131 and the horizontal plane The included angle α between them is 75°, the included angle β between the axis of the second inclined section 133 and the horizontal plane is 65°, and the port of the second inclined section 133 is a feed inlet (its position is higher than that between the second inclined section and the horizon...

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Abstract

A preparation method of a catalytic cracking catalyst comprises the following steps: mixing a molecular sieve and gas containing gas-phase SiCl4 to form a mixture flow, allowing the molecular sieve and the gas-phase SiCl4 to contact at 250-700 DEG C for 10 seconds to 100 minutes, mixing the molecular sieve obtained after contacting with the gas-phase SiCl4 with a binder, clay and water, performing beating and granulation to obtain the catalytic cracking catalyst. The preparation method of the catalyst provided by the invention can realize the continuous proceeding of the contact reaction of the molecular sieve and SiCl4; by the uniform mixing of the molecular sieve and the gas containing gas-phase SiCl4, the silicon supplementing reaction is ensured to be performed uniformly and fully; therefore the prepared molecular sieve has a high crystallization degree, more stable quality, and better performance; by controlling the different contact temperatures of the molecular sieve and SiCl4, different reaction conditions and reaction degrees can be controlled; therefore molecular sieve products with different dealuminization degrees can be obtained, and the catalytic cracking catalyst can be obtained.

Description

technical field [0001] The invention relates to a preparation method of molecular sieves. Background technique [0002] Molecular sieve is a widely used material in catalytic cracking catalyst, and it is also a very important component. The performance of molecular sieve directly affects the reaction performance of catalytic cracking catalyst. According to different needs, molecular sieves can be modified differently to meet the requirements of use. For example, molecular sieves with a high silicon-to-aluminum ratio are generally considered to be required for catalytic cracking catalysts. [0003] In the preparation of molecular sieves with a high silicon-aluminum ratio, there are mainly the following methods: ammonium fluorosilicate method for aluminum and silicon supplementation, hydrothermal method for aluminum and silicon supplementation, and gas phase chemical method for aluminum and silicon supplementation. [0004] The method of ammonium fluorosilicate to extract al...

Claims

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Application Information

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IPC IPC(8): B01J29/06B01J29/08C10G11/05
Inventor 周灵萍朱玉霞许明德田辉平张蔚琳任飞李峥
Owner CHINA PETROLEUM & CHEM CORP
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