Sulfonating method of unsaturated alkane of electron withdrawing group

Abstract

As an important intermediate and product in production, sulfonate is widely applied to various fields, such as anionic surfactants, reaction intermediates and the like. However, in the sulfonation process, sulfur trioxide is generally adopted as a sulfonating agent, and in the sulfonation reaction process, the mixing effect with raw materials is poor, the heat release is severe, and the purity is low. The invention provides a method for carrying out sulfonation reaction on sulfur dioxide serving as a sulfonating agent and unsaturated alkane of an electron withdrawing group in the presence of an acid-binding agent. The method has the advantages of mild reaction conditions, simple process, short reaction time and high yield.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a method for sulfonating unsaturated alkanes with electron-withdrawing groups. Background technique [0002] As one of the important reactions in industrial production, sulfonation plays a very important role in the chemical industry. Sulfonate is an important intermediate for the synthesis of various chemical products. It is used in the application of medicine, food additives, petroleum and surfactants. wider. The sulfonation of unsaturated olefins is usually relatively rapid, but the heat release is huge, and the sulfonating agent is mostly SO in the process of sulfonation reaction 3 , which has a poor mixing effect with the reactants, and at the same time due to the SO 3 The characteristics of the sulfonation reaction lead to the disadvantages of local overheating, poor selectivity, and difficult control of the process. And sodium bisulfite, as another commonly used sulfona...

AI Technical Summary

Problems solved by technology

[0006] Patent CN105622833B discloses a kind of sulfonation reaction with unsaturated alkane polymer, using fuming sulfuric acid or sulfur trioxide as sulfonation reagent to carry out the reaction, the reaction pressure is between 0.1Mpa ~ 4Mpa, the reaction pressure is relatively high, do not use response control

[0007] Although the sulfonation methods described in the above literature can realize the sulfonation reaction of unsaturated alkanes, it usually takes a long time, and additionally added initiators, etc., and requires relatively harsh reaction conditions, resulting in an increase in production costs.

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