Separation equipment and separation method of methyl methacrylate (MMA)

A technology of methyl methacrylate and separation equipment, which is applied in the separation/purification of carboxylate, preparation of carboxylate, chemical instruments and methods, etc. It can solve the problems of not recycling other products and achieve high utilization rate , Low energy consumption, the effect of reducing energy consumption

Inactive Publication Date: 2014-06-04
华东理工大学工程设计研究院有限公司
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Problems solved by technology

In the above separation process, although pure MMA is obtained, other products are not recycled

Method used

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  • Separation equipment and separation method of methyl methacrylate (MMA)
  • Separation equipment and separation method of methyl methacrylate (MMA)

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Embodiment approach 1

[0096] MMA reaction section: the isobutene or tert-butanol extracted from the mixed carbon four is used as the raw material for producing MMA, and enters the first reactor to react with methanol to obtain methacrolein. The reaction is carried out at 0.1MPa~0.2MPa, and the mass content is obtained. 20% methacrolein reaction solution. The methacrolein reaction liquid is refined through a methanol absorption tower, a washing tower, and an aldehyde rectification tower to obtain a methacrylic acid liquid with a mass content of 40%. The 40% methacrylic acid liquid was further reacted with methanol in the second reactor to obtain a methyl methacrylate reaction liquid with a mass content of 31%. 31% of the methyl methacrylate reaction solution enters the MMA separation process for purification.

[0097] Separation process of MMA reaction liquid: 31% methyl methacrylate reaction liquid enters the high-efficiency packed extraction tower T10 with a theoretical plate number of 13 and an ...

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Abstract

The invention relates to the field of chemical technology, and particularly relates to separation equipment and separation method of methyl methacrylate (MMA). The separation equipment of MMA comprises a separation device, and the separation device comprises a solvent tank, an extraction tower, a solvent recovery tower, an impurity ester removal tower and an MMA refining tower. The separation method of MMA comprises a separation process and is operated by the separation equipment by the following steps: 1) extracting the MMA reaction liquid with washing water and n-hexane in the extraction tower to obtain an extract phase from the tower top; 2) heating and refining the extract phase through the solvent recovery tower to obtain coarse MMA from the tower kettle and n-hexane from the tower top; 3) recycling the n-hexane obtained from the tower top in the solvent tank. After the coarse MMA is subjected to impurity ester removal in the impurity ester removal tower and then is processed by the MMA refining tower to obtain the purified MMA product. According to the separation equipment and separation method provided by the invention, the common easily-available n-hexane with a wide source is used as an MMA extraction agent, and the n-hexane is recycled through an MMA refining process.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a separation device and method for methyl methacrylate. Background technique [0002] Methyl methacrylate (MMA) is an important organic chemical raw material with a wide range of uses. In recent years, the Asian market has a strong demand for electronic / electrical / optical products, display signs, various lighting equipment and lamps, which has promoted the rapid development of the MMA industry. The main methods of producing MMA are acetone cyanohydrin method (ACH method), tert-butanol / isobutene direct oxidation method, ethylene carbonylation method and other methods. Among them, the tert-butanol / isobutene direct oxidation method has become the main process technology adopted by the MMA plant in recent years, and its subsequent MMA refining process has also become a research hotspot. [0003] Chinese Patent Publication No. CN101020636 has introduced a kind of purificat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/54C07C67/48
CPCC07C67/48C07C67/58
Inventor 丁宝维张梦华杨鹏范从峰王者龙郑纳伟刘建峰
Owner 华东理工大学工程设计研究院有限公司
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