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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 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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  • Method for preparing catalytic cracking catalyst
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  • Method for preparing catalytic cracking catalyst

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preparation example Construction

[0018] According to the preparation method of catalytic cracking catalyst provided by the present invention, the gas phase silicon tetrachloride and the molecular sieve can be directly mixed and sent into the reactor for reaction; it is also possible to mix the inert gas, that is, the carrier gas, with the gas phase silicon tetrachloride, Form a mixed gas, and then mix the mixed gas with molecular sieves and send them into the reactor for contact reaction; you can also mix the inert gas with the molecular sieves first, so that the molecular sieves are driven by the inert gas in a flowing state and gas-phase silicon tetrachloride. Mixing; the inert gas, molecular sieve and gas phase silicon tetrachloride can also be mixed evenly at the same time and then sent together into the reactor for reaction. Preferably, the inert gas, that is, the carrier gas, is first mixed with gaseous silicon tetrachloride to form a mixed gas, and then the mixed gas is uniformly mixed with molecular si...

Embodiment approach

[0028] 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 first The feed port is located at the other end of the second inclined section 133 . Such setting 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.

[0029] 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 material can quickly and directly enter the second inclined section 133, and then be further conveyed .

[0030] 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 vertical section 132 is perpendicular to the h...

Embodiment 1

[0047] Made of industrial grade stainless steel with a thickness of 3mm NiCr18Ti figure 2 In the shown molecular sieve vapor phase silicon replenishment equipment, the tube 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 meters, 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 angle α between the horizontal planes is 75° (that is, the angle between the first inclined section 131 and the vertical section 132 is 15°), and the angle β between the axis of the second inclined section 133 and the horizontal plane is 65° (that is, the angle between the second inclined s...

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Abstract

The invention relates to a method for a catalytic cracking catalyst, which comprises the following steps: a molecular sieve and gas containing gas phase SiCl4 to form mixed flow, the gas containing gas phase SiCl4 is gas phase SiC4 or a mixed gas of gas phase SiCl4 and inert carrier gas, the molecular sieve in the mixed flow flows with gas, and is contacted with gas phase SiCl4 under a flowing state, wherein the contact time of the molecular sieve and the gas phase SiCl4 is 10 seconds to 100 minutes, then the obtained reactant is contacted with mixed with the molecular sieve contacted with gas phase SiCl4, a binder, clay and water, and granulated to obtain the catalytic cracking catalyst. The preparation method has the advantages that the continuous contact reaction of the molecular sieveand SiCl4 can be realized, the contact time of the molecular sieve and SiCl4 can be controlled by controlling the velocity of the mixed gas and the length of a tubular reactor, so that the contact reaction of the molecular sieve and SiCl4 can be fully carried out in the tubular reactor.

Description

technical field [0001] The invention relates to a preparation method of catalytic cracking catalyst. 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/00B01J29/08C10G11/05C01B39/02C01B39/24
Inventor 周灵萍朱玉霞许明德田辉平张蔚琳任飞
Owner CHINA PETROLEUM & CHEM CORP
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