A kind of equipment for preparing catalytic cracking catalyst

Abstract

The invention relates to a device for preparing a catalytic cracking catalyst, which comprises a NaY molecular sieve exchange apparatus, a furnace, a gas phase ultra-stable reactor, a gas-solid separator and a gelatinizing device. The gas phase ultra-stable reactor comprises a molecular sieve inlet, a molecular sieve outlet and a silicon tetrachloride inlet; the gas phase ultra-stable reactor is capable of moving the molecular sieve from the molecular sieve inlet of the gas phase ultra-stable reactor to the molecular sieve outlet of the gas phase ultra-stable reactor under the condition that carrying gas is not used for conveying, and the molecular sieve and gas-phase silicon tetrachloride are contacted for reacting in the gas phase ultra-stable reactor. The apparatus can be used for continuously preparing a high silicon molecular sieve, the technology flow is simplified, carrying gas of the fluidization molecular sieve is not required, and the consumption of silicon tetrachloride can be greatly reduced.

Description

technical field [0001] The present invention relates to a kind of equipment for preparing catalytic cracking catalyst, and more specifically relates to a kind of equipment and its application for producing molecular sieve by using gas-phase chemical method to extract aluminum and supplement silicon, and then use the obtained molecular sieve to prepare 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 terms of preparing molecular sieves with high silicon-aluminum ratio, there are mainly ...

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Problems solved by technology

However, this method uses gas to carry the molecular sieve powder material and SiCl 4 The gas phase ultrastable reaction is carried out by means of gas contact reaction. In order to fluidize the molecular sieve, the amount of gas must be large enough. The carrier gas and SiCl 4 The weight ratio can reach 10-250, otherwise it is easy to cause the problem of device blockage, increasing the amount of gas makes it difficult to increase the reaction depth, and there is a contradiction between the solid material transportation and the improvement of the gas phase ultra-stable reaction depth. A certain degree of reaction requires a larger SiCl 4 The amount of input will inevitably cause the residual SiCl after the gas phase ultrastable reaction 4 The increase in the amount of exhaust gas not only aggravates the harm of environmental pollution, but also is not conducive to the effective absorption of exhaust gas.

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