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Method using microchannel reaction to prepare chloroethylene carbonate

A technology of chloroethylene carbonate and microchannel reaction, which is applied in chemical instruments and methods, chemical/physical/physical chemical reactors, chemical/physical/physical chemical processes, etc., and can solve cumbersome processes and low product yields, etc. Problems, to achieve sufficient raw material contact reaction, improve purity, and good air tightness

Inactive Publication Date: 2017-06-09
江苏瀚康新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are many methods for producing chlorinated ethylene carbonate in industry, including chlorination reagent substitution method, direct chlorine gas substitution method, solvent chlorine gas substitution method, phosgene method, etc., and most of these methods occur in tank reactors , the process is more loaded down with trivial details, and can produce more by-product ethylene dichlorocarbonate, cause the yield of product is lower

Method used

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  • Method using microchannel reaction to prepare chloroethylene carbonate

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Embodiment 1

[0028] (1) The equipment that described method uses comprises enhanced mass transfer type microchannel reactor 1, metering pump one 2, metering pump two 3, enhanced mass transfer type microchannel reactor comprises preheater 4, storage tank 5, heat exchange The microchannel module 6 made of monocrystalline silicon is connected with several segments in sequence. Each microchannel module 6 includes a spiral tubular microchannel 7 with a heart-shaped internal structure and a hydraulic diameter of 0.5mm, an exhaust valve 8, Nitrogen replacement valve 9, one of the microchannel modules positioned at the outermost side is also provided with a discharge valve 10;

[0029] (2) Ethylene carbonate with a purity of more than 75% is heated from solid to 50°C to become a liquid, and after adding initiator benzoyl peroxide and catalyst aluminum trichloride, mix uniformly to obtain a mixed solution, catalyst aluminum trichloride, initiator The mass ratio of benzoyl peroxide and ethylene carb...

Embodiment 2

[0031] (1) The equipment that described method uses comprises enhanced mass transfer type microchannel reactor 1, metering pump one 2, metering pump two 3, enhanced mass transfer type microchannel reactor comprises preheater 4, storage tank 5, heat exchange Microchannel modules 6 made of monocrystalline silicon, connected in sequence, and several segments connected in sequence, each microchannel module 6 includes a spiral tubular microchannel 7 with a heart-shaped internal structure and a hydraulic diameter of 10 mm, an exhaust valve 8, nitrogen gas Displacement valve 9, one of the microchannel modules positioned at the outermost side is also provided with a discharge valve 10;

[0032] (2) Ethylene carbonate with a purity of more than 75% is heated from solid to 50°C to become a liquid, and after adding initiator benzoyl peroxide and catalyst aluminum trichloride, mix uniformly to obtain a mixed solution, catalyst aluminum trichloride, initiator The mass ratio of agent benzoy...

Embodiment 3

[0034] (1) The equipment that described method uses comprises enhanced mass transfer type microchannel reactor 1, metering pump one 2, metering pump two 3, enhanced mass transfer type microchannel reactor comprises preheater 4, storage tank 5, heat exchange Microchannel modules 6 made of monocrystalline silicon, connected in sequence, and several segments connected in sequence, each microchannel module 6 includes a spiral tubular microchannel 7 with a heart-shaped internal structure and a hydraulic diameter of 5 mm, an exhaust valve 8, nitrogen gas Displacement valve 9, one of the microchannel modules positioned at the outermost side is also provided with a discharge valve 10;

[0035](2) Ethylene carbonate with a purity of more than 75% is heated from solid to 50°C to become a liquid, and after adding initiator benzoyl peroxide and catalyst aluminum trichloride, mix uniformly to obtain a mixed solution, catalyst aluminum trichloride, initiator The mass ratio of benzoyl peroxi...

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Abstract

The invention provides a method using microchannel reaction to prepare chloroethylene carbonate. Equipment used by the method comprises a mass transfer enhancing type microchannel reactor, a first metering pump and a second metering pump, wherein the mass transfer enhancing type microchannel reactor comprises a preheater, a second preheater, a heat exchanger and microchannel modules, and each microchannel module comprises a microchannel, an exhaust valve and a nitrogen displacement valve. The method includes: heating solid ethylene carbonate to allow the same to become liquid, adding an initiator and a catalyst to obtain mixed liquid, feeding the liquid into a preheater through the first metering pump, preheating, feeding liquid chlorine into a storage tank through the second metering pump, synchronously feeding into the microchannels in the microchannel modules, heating, performing mixed reaction, allowing products to flow out from a discharge valve after the reaction, cooling, and rectifying to obtain the chloroethylene carbonate. The method is simple and safe to operate, little in byproduct dichloro ethylene carbonate and high in product purity and yield.

Description

technical field [0001] The invention relates to a preparation method for preparing chloroethylene carbonate, in particular to a method for preparing chloroethylene carbonate by microchannel reaction. Background technique [0002] Chloroethylene carbonate, as an important additive raw material in lithium-ion battery electrolyte, has attracted more and more attention from researchers and enterprises. Using chloroethylene carbonate as raw material, a variety of useful lithium-ion electrolytes can be derived. Additives, such as chloroethylene carbonate as raw material, react with potassium fluoride to produce fluoroethylene carbonate; use chloroethylene carbonate or dichloroethylene carbonate as raw material, under the action of a catalyst, vinylene carbonate can be produced . There are many methods for producing chlorinated ethylene carbonate in industry, including chlorination reagent substitution method, direct chlorine gas substitution method, solvent chlorine gas substitut...

Claims

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Application Information

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IPC IPC(8): C07D317/42B01J19/00
CPCC07D317/42B01J19/0093
Inventor 许国荣庞宝华孙西船戴江英孔令文
Owner 江苏瀚康新材料有限公司
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