Equipment for preparing molecular sieve

Abstract

The invention relates to equipment for preparing a molecular sieve, which comprises a tubular reactor, a gas-solid separator and an absorption column, wherein the tubular reactor comprises a first feeding hole, a discharging hole and a tube body, the first feeding hole and the discharging hole are respectively positioned at two end parts of the tube body, the tubular reactor is communicated with the gas-solid separator through the discharging hole, the upper part of the gas-solid separator is communicated with the absorption column, and the position where the gas-solid separator is connected with the discharging hole is lower than that where the gas-solid separator is connected with the absorption column. The equipment for preparing the molecular sieve, provided by the invention, can realize the continuous operation of the contact reaction of the molecular sieve and SiCl4, and can control the contact time of the molecular sieve and the SiCl4 through controlling the length of the tubular reactor and the flow speed of the carrier gas, thereby being capable of enabling the contact reaction of the molecular sieve with the SiCl4 to be fully carried out in the tubular reactor.

Description

technical field [0001] The invention relates to a device for preparing 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 alu...

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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

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