A kind of solid acid catalyzed alkylation method

Abstract

A solid acid catalyzed alkylation method, comprising: after the alkylation reaction raw material is mixed with the circulating isobutane fraction, it is contacted with a solid acid catalyst in an alkylation reactor and an alkylation reaction occurs, and the alkylation reaction The outlet stream of the device is separated in the fractionation system to obtain light fraction, isobutane fraction, n-butane fraction and alkylated gasoline respectively, wherein the isobutane fraction is circulated in the reaction system, which is characterized in that the said alkyl The reactor is a loop reactor, which provides the power of the reactant flow circulation through the circulation of the inert gas in the reaction system, and adjusts the circulation amount of the reactant flow by adjusting the circulation amount of the inert gas, so that the reactant flow in contact with the catalyst reaches the required alkane. The loop reactor is composed of an inner cylinder and no less than two side arm reaction units, and the side arm reaction units are filled with a solid acid catalyst.

Description

technical field [0001] The invention relates to an alkylation method of isoparaffins and olefins, more specifically a solid acid catalyzed alkylation method of isoparaffins and olefins. Background technique [0002] During the processing of oil products, processes such as catalytic cracking, delayed coking and thermal cracking will produce liquefied gas fractions. After recovering propylene through a gas fractionation device, the obtained C 4 C with alkanes and alkenes as the main components 4 Fraction, C 4 The isobutane and butene in the distillate can be produced by alkylation reaction to produce alkylated gasoline. Alkylated gasoline does not contain impurities such as sulfur and nitrogen, does not contain aromatics and olefins, and has a high octane number. It is an ideal clean gasoline blending component. Over the past ten years, with the continuous improvement of environmental protection requirements, my country's gasoline standards have also been continuously upgra...

AI Technical Summary

Problems solved by technology

The alkene ratio of the reaction material corresponds to the number of olefins. To achieve a higher alkene ratio, the olefins need to be divided into more parts, so that the reaction system needs to have more catalyst beds or more reactors. The number of olefins usually needs to be divided into dozens of parts to achieve the ideal alkene ratio, and the structure of the reaction system will be quite complicated

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