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A kind of ethylene glycol bis (propionitrile) ether continuous purification method and device

A technology of ethylene glycol bisulfite purification method, which is applied in chemical instruments and methods, carboxylic acid nitrile purification/separation, separation methods and other directions, can solve the problems of poor product quality stability, difficult control of reaction conditions, and increased separation difficulty, etc. To achieve better separation effect, continuous production operation, and lower production costs

Active Publication Date: 2022-07-26
DONGYING HI TECH SPRING CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As an additive, the purity requirements are very high. Currently, most of the products on the market are about 99.7% and the prices are still high.
Regarding the purification method of ethylene glycol bis(propionitrile) ether, there have been related reports in China, such as CN109134309B patent document, the technical scheme is to add an acylating reagent to the crude product for acylation reaction, and the reaction solution after the reaction is post-treated The secondary crude product, the finished product of the secondary crude product through vacuum distillation, although this method can effectively improve the product purity, but the method needs to introduce new impurities, which increases the difficulty of separation in the later stage, and vacuum distillation belongs to intermittent Rectification, the reaction conditions are difficult to control, the operation is cumbersome, and the product quality stability is poor at the same time

Method used

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  • A kind of ethylene glycol bis (propionitrile) ether continuous purification method and device
  • A kind of ethylene glycol bis (propionitrile) ether continuous purification method and device

Examples

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Embodiment 1

[0021] like Figure 1-2 As shown, the embodiment of the present invention provides a continuous purification method for ethylene glycol bis(propionitrile) ether, comprising the following steps:

[0022] S1. Device construction: Install preheater one 1, temperature sensor one 2, evaporator one 3, buffer tank one 4, buffer tank two 5, pump one 6, pump two 7, preheater two 8 at the designated position , temperature sensor two 9, evaporator two 10, buffer tank three 11, buffer tank four 12, pump three 13 and pump four 14, and complete the connection between the devices;

[0023] S2. System debugging: set the temperature and pressure for preheater one 1, temperature sensor one 2, evaporator one 3, buffer tank one 4, buffer tank two 5, pump one 6 and pump two 7; Set the temperature and pressure of the device two 8, the temperature sensor two 9, the evaporator two 10, the buffer tank three 11, the buffer tank four 12, the pump three 13 and the pump four 14;

[0024] S3, light compo...

Embodiment 2

[0032] like Figure 1-2 As shown, the embodiment of the present invention provides a continuous purification method of ethylene glycol bis(propionitrile) ether, comprising the following steps, using ethylene glycol and acrylonitrile as raw materials to carry out a catalytic reaction to obtain 500 g of a crude product with a purity of 94.5%, for subsequent use, in Install preheater one 1, temperature sensor one 2, evaporator one 3, buffer tank one 4, buffer tank two 5, pump one 6, pump two 7, preheater two 8, temperature sensor two 9, After the evaporator two 10, the buffer tank three 11, the buffer tank four 12, the pump three 13 and the pump four 14, and the connection between each device is completed, the system pressure of the debugging and delighting process is 10KPa, and the temperature is 200 ℃, the system pressure of the de-heavy component process is 1KPa, and the temperature is 190℃. After the system reaches the set value of each parameter, the crude product is transpo...

Embodiment 3

[0034] like Figure 1-2 As shown, the embodiment of the present invention provides a continuous purification method for ethylene glycol bis(propionitrile) ether, which includes the following steps, using ethylene glycol and acrylonitrile as raw materials to carry out catalytic reaction to obtain 500 g of a crude product with a purity of 94.3%, for use, in Install preheater one 1, temperature sensor one 2, evaporator one 3, buffer tank one 4, buffer tank two 5, pump one 6, pump two 7, preheater two 8, temperature sensor two 9, After the evaporator two 10, the buffer tank three 11, the buffer tank four 12, the pump three 13 and the pump four 14, and the connection between each device is completed, the system pressure of the debugging and light component removal process is 5KPa, and the temperature is 170 ℃, the system pressure of the de-heavy component process is 500Pa, and the temperature is 180℃. After the system reaches the set value of each parameter, the crude product is tr...

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Abstract

The invention provides a continuous purification method and device of ethylene glycol bis(propionitrile) ether, and relates to the field of lithium ion battery electrolyte additives. The continuous purification method of ethylene glycol bis(propionitrile) ether comprises the following steps: Set the temperature and pressure for preheater 1, temperature sensor 1, evaporator 1, buffer tank 1, buffer tank 2, pump 1 and pump 2; for preheater 2, temperature sensor 2. The evaporator 2, the buffer tank 3, the buffer tank 4, the pump 3 and the pump 4 set the temperature and pressure. The continuous purification method of ethylene glycol bis(propionitrile) ether provided by the invention not only does not introduce new impurities, but can continuously and stably make the product purity reach more than 99.5%, and at the same time realizes simple equipment, small investment, simple operation and continuous It can greatly save manpower operation and reduce production cost.

Description

technical field [0001] The invention relates to the technical field of electrolyte additives for lithium ion batteries, in particular to a continuous purification method and device of ethylene glycol bis(propionitrile) ether. Background technique [0002] Ethylene glycol bis(propionitrile) ether is a high-voltage lithium-ion battery additive that can improve the high-temperature performance of lithium-ion batteries. It has been widely used in lithium cobalt oxide batteries, and its use in lithium iron phosphate power batteries is under development It can be compounded with FEC to suppress the high temperature swelling of the battery. As an additive, the purity requirements are very high. At present, most of the products on the market are about 99.7% of the products and the prices remain high. Regarding the purification method of ethylene glycol bis(propionitrile) ether, there have been relevant reports in China, such as the CN109134309B patent document. The secondary crude...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C253/34C07C255/13B01D5/00B01D1/00
CPCC07C253/34B01D1/0041B01D5/0006B01D5/006B01D5/009C07C255/13Y02E60/10
Inventor 杨明展滕文彬张生安祝秀林郭宝全
Owner DONGYING HI TECH SPRING CHEM IND
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