Method for preparing cyclic sulfate by directly oxidizing hydrogen peroxide

Abstract

The method comprises the following steps: dropwise adding hydrogen peroxide into a mixture of cyclic sulfite, an organic solvent and a solid catalyst to carry out catalytic oxidation reaction, filtering out the solid catalyst after the reaction is finished, standing filtrate for layering, taking an organic layer, and performing distilling and concentrating to obtain a cyclic sulfate product. Cheaphydrogen peroxide is used for directly catalyzing and oxidizing cyclic sulfite to prepare cyclic sulfate, so that on one hand, the reaction is mild and easy to control, and the reaction conversion rate is high; on the other hand, no waste salt is generated, the evaporation capacity of water is small, energy consumption is low, generated waste water is little, and the production process is more environmentally friendly; the used solid catalyst contains an active component, an active auxiliary agent and an oxide carrier, and can be recycled, so that the consumption of noble metals is reduced, and the production cost is greatly reduced; the cyclic sulfate prepared by the method is few in impurities, high in purity and wide in market prospect.

Description

technical field

[0001] The invention relates to the technical field of new energy material synthesis, in particular to a method for preparing cyclic sulfate by direct oxidation of hydrogen peroxide. The cyclic sulfate prepared by the method can be used as an additive for lithium-ion battery electrolyte, and can also be used for drug synthesis intermediates. Background technique

[0002] With the enhancement of people's awareness of environmental protection and the advancement of science and technology, people pay more and more attention to new green energy technologies, especially lithium-ion secondary batteries, due to their characteristics such as high working voltage, small size, light weight, high energy density, The advantages of low environmental pollution, small self-discharge, long cycle life and no memory effect have attracted the attention of the battery industry and been widely used. As an additive for lithium-ion battery electrolyte, cyclic sulfate can effective...

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