Malononitrile purification method
The separation of malononitrile through the melt crystallization method solves the problems of solvent volatilization, vacuum pump clogging and high energy consumption in the existing technology, achieves the purification of malononitrile with high purity and high yield, and reduces the refining cost and energy consumption.
CN112679385AActive Publication Date: 2021-04-20HEBEI CHENGXIN +1
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- HEBEI CHENGXIN
- Filing Date
- 2020-12-31
- Publication Date
- 2021-04-20
AI Technical Summary
Technical Problem
Existing malononitrile purification methods have problems such as environmental pollution caused by solvent volatilization, vacuum pump clogging, high energy consumption, and difficulty in reaching 99.9% purity.
Method used
The melt crystallization method is used to separate malononitrile from crude malononitrile. Through two crystallization processes, the temperature and energy consumption are reduced, polymerization is avoided, and the purity and yield are improved.
Benefits of technology
It significantly reduces the refining cost of malononitrile, achieves a purity of more than 99.95% and a yield of more than 99%, avoids solvent volatilization and vacuum pump clogging, and reduces energy consumption by more than 50%.
✦ Generated by Eureka AI based on patent content.
Abstract
The invention relates to the technical field of compound purification, and particularly discloses a malononitrile purification method. The purification method of malononitrile specifically comprises the step of separating malononitrile from a malononitrile crude product through adoption of a melt crystallization method. According to the malononitrile purification method provided by the invention, a vacuum system does not need to be arranged, the required temperature is relatively low, the energy consumption is reduced by 50% or above, the refining cost and refining time of malononitrile are greatly reduced, and the finally obtained malononitrile pure product has extremely high purity and yield.
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