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Rectification system capable of recovering epoxypropane raffinate and working process of rectification system

A technology of propylene oxide and rectification system, which is applied in the field of rectification system for recovering propylene oxide residue, can solve the problems of high equipment investment and operation cost, complicated operation process, etc., and achieve saving of equipment investment and operation cost, application The effect of broad prospects and low material consumption and energy consumption

Inactive Publication Date: 2019-02-15
雅邦新材料研发南京有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although these processes can obtain high-purity propylene oxide, the operation process is complicated, and the equipment investment and operating costs are also high.

Method used

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  • Rectification system capable of recovering epoxypropane raffinate and working process of rectification system

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Embodiment 1

[0038] A rectification system for reclaiming propylene oxide raffinate, comprising weight removal tower 1, extractive distillation tower 2, solvent recovery tower 3, azeotropic rectification tower 4 and phase separation tank 5, the middle part of weight removal tower 1 is connected with Propylene oxide raffinate feed line S1, the bottom of the weight removal tower is connected with the discharge line S3 at the bottom of the weight removal tower, and the top of the weight removal tower 1 passes through the discharge line S2 of the top condenser of the weight removal tower and the extraction and rectification The middle part of the tower 2 is connected, and the top of the extractive distillation tower 2 is connected with the middle part of the azeotropic rectification tower 4 through the discharge line S4 of the condenser at the top of the extractive distillation tower, and the bottom of the extractive distillation tower 2 is discharged through the bottom of the extractive distill...

Embodiment 2

[0042] A rectification system for reclaiming propylene oxide raffinate, comprising weight removal tower 1, extractive distillation tower 2, solvent recovery tower 3, azeotropic rectification tower 4 and phase separation tank 5, the middle part of weight removal tower 1 is connected with Propylene oxide raffinate feed line S1, the bottom of the weight removal tower is connected with the discharge line S3 at the bottom of the weight removal tower, and the top of the weight removal tower 1 passes through the discharge line S2 of the top condenser of the weight removal tower and the extraction and rectification The middle part of the tower 2 is connected, and the top of the extractive distillation tower 2 is connected with the middle part of the azeotropic rectification tower 4 through the discharge line S4 of the condenser at the top of the extractive distillation tower, and the bottom of the extractive distillation tower 2 is discharged through the bottom of the extractive distill...

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Abstract

The invention discloses a rectification system capable of recovering epoxypropane raffinate and a working process of the rectification system. The rectification system comprises a heavy component removal tower, an extraction rectification tower, a solvent recovery tower, an azeotropic rectification tower and a phase splitting tank. By means of the operation manner of combining three operation manners including pretreatment, extraction rectification and azeotropic rectification, through reasonable selection of an extraction agent and an entrainer, a high-purity epoxypropane product is obtainedwith the rectification method, a process of impurity removal with a chemical method is omitted, equipment investment is reduced, operation difficulty is simplified, and meanwhile, material loss of epoxypropane in a reaction link is avoided, and the yield of epoxypropane is increased. In addition, the extraction agent and the entrainer can be recycled, and material consumption of the whole processis lower.

Description

technical field [0001] The invention relates to the field of organic raffinate recovery, in particular to a rectification system for recovering propylene oxide raffinate. Background technique [0002] Propylene oxide, also known as propylene oxide and methyl oxirane, is a very important organic compound raw material and the third largest propylene derivative after polypropylene and acrylonitrile. Propylene oxide is mainly used in the production of polyether polyols, propylene glycol and various nonionic surfactants, among which polyether polyols are important raw materials for the production of polyurethane foams, insulation materials, elastomers, adhesives and coatings, etc. Ionic surfactants are widely used in petroleum, chemical, pesticide, textile, daily chemical and other industries. At the same time, propylene oxide is also an important basic chemical raw material. [0003] At present, the production process of propylene oxide is mainly divided into three categories:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D303/04C07D301/32
CPCC07D303/04C07D301/32
Inventor 华超白芳陆平张旭樊振寿
Owner 雅邦新材料研发南京有限公司
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