Method for preparing vinylene carbonate through micro channel reaction

A vinylene carbonate, microchannel reaction technology, applied in electrochemical generators, electrical components, circuits, etc., can solve the problems of complicated preparation process, low crude product yield, and many by-products, etc., to improve reaction efficiency. , high yield, complete reaction effect

Active Publication Date: 2017-05-31
江苏瀚康新材料有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the preparation method of vinylene carbonate, such as CN201510922630.9 and CN201410546929.4, belongs to the traditional process. The general process is to dechlorinate chloroethylene carbonate to obtain a crude product, and then refine the crude product to obtain the final product vinylene carbonate. , the existing problem is that the preparation process is complex and cumbersome, the by-products are more, and the moisture is higher, resulting in a low yield of the crude product, and the yield of the crude product will be lower after refining (especially the recrystallization process), and the unit consumption is more. lead to high cost

Method used

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  • Method for preparing vinylene carbonate through micro channel reaction

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Effect test

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, microfilter 12, and enhanced mass transfer type microchannel reactor comprises preheater one 4, Preheater 2 5, ultrasonic device 11, and microchannel modules 6 made of ceramics connected 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, a nitrogen replacement valve 9, an ultrasonic device 11 is arranged on the outer wall of the spiral tubular microchannel 7, and one of the microchannel modules located on the outermost side is also provided with a discharge valve 10;

[0029] (2) Mix chloroethylene carbonate and dimethyl carbonate evenly to obtain a mixed solution, input the mixed solution through the metering pump 12 into the preheater 14 to preheat to 25°C, and input the triethylamine through the met...

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, microfilter 12, and enhanced mass transfer type microchannel reactor comprises preheater one 4, Preheater 2 5, ultrasonic device 11, and microchannel modules 6 made of polytetrafluoroethylene connected in sequence, each microchannel module 6 includes a spiral tubular inner structure with a heart-shaped structure and a hydraulic diameter of 0.5 mm. Microchannel 7, exhaust valve 8, nitrogen replacement valve 9, ultrasonic device 11 are arranged on the outer wall of spiral tubular microchannel 7, and one of the microchannel modules located at the outermost side is also provided with discharge valve 10;

[0032] (2) Mix chloroethylene carbonate and diethyl carbonate evenly to obtain a mixed solution, input the mixed solution through the metering pump 12 into the preheater 14 to preheat to 35°C, and input the triethylamine throug...

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, microfilter 12, and enhanced mass transfer type microchannel reactor comprises preheater one 4, Preheater 2 5, ultrasonic device 11, and microchannel modules 6 made of polytetrafluoroethylene connected in sequence, each microchannel module 6 includes a spiral tubular inner structure with a heart-shaped structure and a hydraulic diameter of 0.5 mm. Microchannel 7, exhaust valve 8, nitrogen replacement valve 9, ultrasonic device 11 are arranged on the outer wall of spiral tubular microchannel 7, and one of the microchannel modules located at the outermost side is also provided with discharge valve 10;

[0035] (2) Mix chloroethylene carbonate and ethylene carbonate evenly to obtain a mixed solution, feed the mixed solution to preheater 14 through metering pump 12 to preheat to 30°C, and input triethylamine to The preheater 2 5...

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Abstract

The invention provides a method for preparing vinylene carbonate through micro channel reaction. The method comprises the following steps: (1) preparing equipment, including an enhanced mass transfer micro channel reactor, a metering pump I, a metering pump II and a micro filter, wherein the enhanced mass transfer micro channel reactor comprises a preheater I, a preheater II, an ultrasonic device and a micro channel module; (2) uniformly mixing chloroethylene carbonate with an ester solvent so as to obtain a mixed liquid, synchronously inputting the preheated mixed liquid and triethylamine into a micro channel, heating, mixing, performing reaction, discharging a product obtained after the reaction is completed from a discharge valve, filtering so as to obtain a crude product, and rectifying the crude product into a rectifying still, so as to obtain the vinylene carbonate, wherein the mole ratio of the chloroethylene carbonate to the triethylamine is 1:(1.5-2.0). The method is simple, convenient and safe to operate, relatively small in quantity of byproducts, small in single solvent consumption, low in moisture content, relatively high in product purity and yield, small in environment pollution and applicable to industrial large-scale production, and continuous production can be achieved.

Description

technical field [0001] The invention relates to a preparation method for preparing vinylene carbonate, in particular to a method for preparing vinylene carbonate by microchannel reaction. Background technique [0002] Lithium-ion battery is a new type of green energy, which is widely used in energy storage products such as communications, household appliances, electric tools, electric bicycles, electric vehicles, solar energy, and wind power generation, and has broad development prospects. Adding some additives to lithium-ion batteries can improve the performance of the battery in all aspects. As an organic film-forming additive and overcharge protection additive for lithium-ion battery electrolyte, vinylene carbonate has good high and low temperature performance and anti-flatulence function. At the same time, vinylene carbonate can form a dense electrolyte film between the positive and negative electrodes of the lithium battery, thereby improving the charge and discharge ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D317/40H01M10/0567
CPCC07D317/40H01M10/0567Y02E60/10
Inventor 孔令文许国荣孙西船庞宝华张正洪
Owner 江苏瀚康新材料有限公司
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