Alkylation method

Abstract

The invention relates to an alkylation method, which comprises the following steps: mixing isobutane and C3-C5 olefin gas to form mixed raw material gas, dispersing concentrated sulfuric acid into liquid drops with the size of 0.001-500 [mu]m, mixing the mixed raw material gas with the concentrated sulfuric acid liquid drops, and then carrying out quenching treatment under the conditions that the temperature is -20 to 20 DEG C and the pressure is 0.1-1 MPa, so that the mixed raw material gas is subjected to phase change condensation and is kept for 0.1-10 seconds; and the reaction temperature is adjusted to -20 DEG C to 10 DEG C, the reaction pressure is kept to be 0.1-1 MPa, and the materials are subjected to an alkylation reaction. The method comprises the following steps: mixing a mixed raw material gas with finely dispersed sulfuric acid liquid drops, condensing the raw material gas on the surface of the sulfuric acid liquid drops under a quenching condition to form reaction liquid drops, further controlling the reaction conditions, taking sulfuric acid as a catalyst, enabling the condensed raw material gas to quickly generate alkylation reaction, and enabling olefin and alkane to react according to a molecular ratio close to 1:1, so that side reactions are reduced, and the alkylation reaction efficiency is improved.

Description

technical field [0001] The invention relates to an alkylation reaction, in particular to a new method of alkylation in which phase state changes occur during the reaction. Background technique [0002] The alkylated oil produced by the alkylation of isobutane and C3~C5 olefins has the characteristics of high octane number, low vapor pressure, low aromatic olefins, etc., and is an important gasoline blending component. With the development of society, the requirements for environmental protection are becoming more and more stringent. As a clean and environmentally friendly high-octane gasoline blending oil, the importance of alkylate is becoming more and more prominent. [0003] Alkylation reaction is a traditional technology in the field of petroleum refining, mainly including sulfuric acid alkylation technology and hydrofluoric acid alkylation technology. Under the action of catalyst (sulfuric acid or hydrofluoric acid), isobutane reacts with olefins to obtain isobutane st...

AI Technical Summary

Problems solved by technology

[0008] In order to solve the problem that the uneven mixing of alkanes, olefins and sulfuric acid in the alkylation reaction of the prior art leads to the increase of the amount of alkyl and sulfuric acid in the reaction, the present invention provides a method for alkylation, which utilizes the change control of reaction conditions Phase change, improve the mixing effect of sulfuric acid catalyst and reactants, reduce side reactions, and improve the utilization of reactants

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