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Crystallization device and method for purifying ethylene carbonate

A ethylene carbonate and crystallization device technology, which is applied in the field of crystallization devices for purifying ethylene carbonate, can solve the problems of low energy consumption, low product purity, and high energy consumption, and achieve mild process, improved purity, and improved heat exchange efficiency. Effect

Pending Publication Date: 2021-03-19
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The present invention aims at the technical problems of high energy consumption and low product purity when separating and purifying ethylene carbonate in the prior art, and provides a crystallization device and method for purifying ethylene carbonate, and the method for crystallizing and purifying ethylene carbonate by using the device, It has the advantages of high purity of the obtained product and low energy consumption

Method used

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  • Crystallization device and method for purifying ethylene carbonate
  • Crystallization device and method for purifying ethylene carbonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] use figure 1 In the crystallization device shown, a tapered extension pipe with a straight pipe is arranged under the material distributor, and a zigzag extension pipe is arranged at the inlet of the cold / hot agent and outside the heat exchange pipe; the bottom of the heat exchange pipe is closed in an inverted tapered shape.

[0046] The weight percent composition is ethylene carbonate 90.15%, ethylene glycol 6.23%, and other 3.62% raw materials containing EC. After preheating and melting, the raw materials enter the upper head from the material inlet, and enter the exchange through the material distributor and the extension pipe below it. inside the heat pipe, and flow downward along the inner wall of the heat exchange tube. The refrigerant enters from the inlet of the cold / hot agent, and flows downward along the outer wall of the heat exchange tube after passing through the inlet of the cold / hot agent and the extension tube outside the heat exchange tube.

[0047] P...

Embodiment 2

[0049] use figure 1 In the crystallization device shown, a tapered extension pipe is set under the material distributor, such as figure 2 As shown in (a), the inlet of the cold / heating agent and the outside of the heat exchange tube are provided with inverted tapered extension tubes, such as figure 2 As shown in (c); the bottom of the heat exchange tube is closed in an inverted tapered shape.

[0050] The weight percent composition is ethylene carbonate 90.15%, ethylene glycol 6.23%, and other 3.62% raw materials containing EC. After preheating and melting, the raw materials enter the upper head from the material inlet, and enter the exchange through the material distributor and the extension pipe below it. inside the heat pipe, and flow downward along the inner wall of the heat exchange tube. The refrigerant enters from the inlet of the cold / hot agent, and flows downward along the outer wall of the heat exchange tube after passing through the inlet of the cold / hot agent a...

Embodiment 3

[0053] use figure 1 In the crystallization device shown, a zigzag extension pipe is set under the material distributor, such as figure 2 As shown in (b), the inlet of the cold / heating agent and the outside of the heat exchange tube are provided with an inverted tapered extension tube, such as figure 2 As shown in (c); the bottom of the heat exchange tube is closed in an inverted tapered shape.

[0054] The weight percent composition is ethylene carbonate 90.15%, ethylene glycol 6.23%, and other 3.62% raw materials containing EC. After preheating and melting, the raw materials enter the upper head from the material inlet, and enter the exchange through the material distributor and the extension pipe below it. inside the heat pipe, and flow downward along the inner wall of the heat exchange tube. The refrigerant enters from the inlet of the cold / hot agent, and flows downward along the outer wall of the heat exchange tube after passing through the inlet of the cold / hot agent ...

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Abstract

The invention relates to a crystallization device and method for purifying ethylene carbonate. The device comprises a shell, a material inlet is formed in the top of the shell, a material outlet is formed in the bottom of the shell, a cold / hot agent inlet and a cold / hot agent outlet are formed in the two sides of the shell respectively, and the horizontal position of the cold / hot agent inlet is higher than that of the cold / hot agent outlet; a heat exchange pipe and a material distributor are arranged in the shell, and the material distributor is arranged at the bottom of an upper end socket ofthe shell; the top of the heat exchange pipe is connected with the material distributor, and the bottom of the heat exchange pipe is connected with the material outlet through the lower shell sealinghead; and an extension pipe is arranged below the material distributor, and the extension pipe is located in the heat exchange pipe. According to the method for purifying ethylene carbonate by usingthe device, an ethylene carbonate product with the purity of more than or equal to 99.99%can be obtained.

Description

technical field [0001] The invention belongs to the field of purification of ethylene carbonate, in particular to a crystallization device and method for purifying ethylene carbonate. Background technique [0002] Ethylene carbonate (EC, C 3 h 4 o 3 , CAS No.: 96-49-1), is a high-boiling solvent and organic synthesis intermediate with excellent performance, widely used in textile printing and dyeing, polymer synthesis, electrochemistry, medicine and other fields, among which refined EC is used as a production One of the raw materials of high-energy lithium-ion battery electrolyte has high added value. Therefore, with the rapid development of the aforementioned power lithium battery market, power battery-grade refined EC obviously has broad development prospects. [0003] Since the performance of lithium-ion batteries depends to a large extent on the performance of the battery's constituent materials and the preparation process, such as a small amount of water, alcohol, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D9/02C07D317/38
CPCB01D9/0013B01D9/0059B01D9/0063C07D317/38B01D2009/0086
Inventor 郭艳姿陈亮吴成跃
Owner CHINA PETROLEUM & CHEM CORP
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