Molecular sieve production apparatus

Abstract

The invention relates to a molecular sieve production apparatus, which comprises a NaY molecular sieve exchange device, a baking furnace, a gas phase ultra-stable reactor and a gas-solid separation device, wherein the gas phase ultra-stable reactor comprises a molecular sieve inlet, a molecular sieve outlet and a silicon tetrachloride inlet. According to the present invention, with the gas phase ultra-stable reactor, the molecular sieve can move to the molecular sieve outlet of the gas phase ultra-stable reactor from the molecular sieve inlet of the gas phase ultra-stable reactor in the case of no requirement of conveying of the molecular sieve through carrier gas, and the molecular sieve and gas phase silicon tetrachloride can be subjected to a contact reaction in the gas phase ultra-stable reactor; and the apparatus can be used for continuous production of the high silicon molecular sieve, and further has characteristics of process simplifying, no requirement of molecular sieve fluidization carrier gas, and substantial silicon tetrachloride consumption reduction.

Description

technical field [0001] The invention relates to a device for preparing molecular sieves, and more particularly relates to a device for producing molecular sieves by using a gas-phase chemical method to extract aluminum and supplement silicon and its application. 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 the following methods: ammonium fluorosilicate method to extract aluminum and replenish silicon, hydrothermal method and...

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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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