Alkylation method adopting novel microchannel reactor

Abstract

The invention discloses an alkylation method adopting a novel microchannel reactor. According to the method, iso-butane and olefin serving as raw materials are added with a proper amount of dimethylmethane serving as refrigerant and entrainer to perform an alkylation reaction to obtain an alkylate oil; the raw materials and catalyst perform the alkylation reaction in a microchannel reaction zone in the microchannel reactor, and are settled and layered in a settling section; then the reacting materials continuously enter a horizontal separation tank, lower catalyst is extracted, upper gas is exhausted, and the intermediate product is delivered to a coalescing separator; and the microchannel reaction zone is formed by a tube-type microchannel reaction zone and a surface-type microchannel reaction zone. The method has the characteristics of low temperature performance, no premix requirement for reacting raw materials, small bed pressure drop, good energy-saving effect, high product quality and the like, and can realize efficient, energy-saving, safe, low carbon and environment-friendly continuous production.

Description

technical field [0001] The invention belongs to the field of petrochemical industry and discloses an alkylation method using a novel microchannel reactor. Background technique [0002] At present, the requirements for gasoline indicators in various countries in the world are becoming more and more stringent. The production process of high-quality gasoline has become the focus of attention. The alkylation process is a conventional and mature method for producing high-quality gasoline blending components, that is, alkylated oil. method. Alkylation reaction is the reaction of isobutane and C3-C5 olefins under the action of acid catalyst to produce gasoline components with high octane number. The reaction product has the characteristics of low sulfur and does not contain aromatics or olefins. [0003] Due to the microstructure of the filler in the internal reaction bed, the microchannel reactor has a very large specific surface area, which can reach hundreds or even thousands o...

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Problems solved by technology

[0005] However, in the above-mentioned patent, a large amount of paraffin material flow is fed, which will cause a bad initial distribution. The microchannel itself has a small radial diffusion coefficient. If the local temperature is too high, there will be a temperature difference in the reaction area, which will make the alkylation rate unbalanced

Moreover, the device is filled with hydrogen, which increases the difficulty of separation and the risk of operation.

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