Reinforced micro-interface preparation system and method of cyclic carbonate

Abstract

The invention provides a reinforced micro-interface preparation system and a method of cyclic carbonate, the preparation system comprises a stirring kettle, a first carboxylation reaction kettle and asecond carboxylation reaction kettle, and the stirring kettle, the first carboxylation reaction kettle and the second carboxylation reaction kettle are all filled with an ionic liquid catalyst; a micro-interface unit is arranged on the side surface of the stirring kettle and consists of a plurality of external micro-interface generators. According to the reinforced micro-interface preparation system, the phase boundary mass transfer area between carbon dioxide and cyclic carbonate generated in situ in the carboxylation reaction process is increased; and the carbon dioxide and the cyclic carbonate are fully mixed and then subjected to the carboxylation reaction, so that the problem that the carbon dioxide and the cyclic carbonate cannot be fully mixed in the reaction kettle in the prior art is solved.

Description

technical field [0001] The invention relates to the field of preparation of cyclic carbonates, in particular to a system and method for preparing a reinforced micro-interface of cyclic carbonates. Background technique [0002] Cyclic carbonate is an important chemical product. Cyclic carbonate is widely used in organic synthesis intermediates, polar aprotic solvents, lithium ion battery electrolytes, polymer monomers and other fields. The industrial synthesis of cyclic carbonate is the carboxylation of epoxy compounds and carbon dioxide. The process uses metal halides and ammonium salts as catalysts to realize the synthesis of cyclic carbonates from epoxy compounds and carbon dioxide at a pressure of 2.0-5.0 MPa and a temperature of 100-150°C. [0003] However, most epoxy compounds are toxic and may induce cancer. Olefins are more widely available, cheaper and less toxic than epoxies. Compounds can be prepared from alkenes by epoxidation. Using olefins and carbon dioxide...

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Problems solved by technology

[0006] The first purpose of the present invention is to provide an enhanced micro-interface preparation system for cyclic carbonates. The enhanced micro-interface preparation system is based on the micro-interface reaction strengthening technology, and the carbon dioxide is efficiently broken into micron-sized bubbles by a micro-interface generator, and dispersed Form a micro-interface system into the liquid raw material, increase the gas-liquid phase interface area in the carboxylation reactor by tens of times, greatly increase the mass transfer rate from the gas phase to the reaction liquid and the macroscopic hydrogenation rate, so as to realize the direct conversion of olefins and carbon dioxide Synthesize cyclic carbonate, and solve the problem of low efficiency of the reaction system in the prior art because carbon dioxide and liquid raw materials cannot be fully mixed in the reactor

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