Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system

A technology of rectification system and waste liquid, which is applied in the field of separation and purification of DMAC or DMF, and can solve problems such as air pollution and pollution

Active Publication Date: 2015-09-30
常州冀德环保科技有限公司
View PDF6 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the existing environmental protection problems of air pollution and water pollution, and provide a seven-tower five-effect rectification system with high recovery rate and good recovery product quality of DMAC or DMF waste liquid and its recovery method

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system
  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system
  • Seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid and recovery method of seven-tower five-effect rectification system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0052] A seven-tower five-effect rectification system for DMAC or DMF waste liquid, the seven-tower five-effect rectification system includes a first concentration tower, a second concentration tower, a third concentration tower, a fourth concentration tower, and a fifth concentration tower , rectification tower and deacidification tower,

[0053] The material outlet of the waste liquid tank in the tank area is connected to the material inlet of the feed preheater through the waste liquid pump, the material outlet of the feed preheater is connected to the material inlet of the first concentration tower, and the material outlet of the first concentration tower is discharged through T101 The pump is connected to the material inlet of the second concentration tower, the material outlet of the second concentration tower is connected to the material inlet of the third concentration tower through the T102 discharge pump, and the material outlet of the third concentration tower is con...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a seven-tower five-effect rectification system for DMAC (N,N-dimethyl acetamide) or DMF (N,N-dimethylformamide) waste liquid. The system comprises a first concentrating tower, a second concentrating tower, a third concentrating tower, a fourth concentrating tower, a fifth concentrating tower, a rectifying tower and a deacidification tower. The invention also discloses a recovery method of the seven-tower five-effect rectification system for the DMAC or DMF waste liquid, and the recovery method comprises the steps of recovery treatment of the DMAC and DMF waste liquid, recovery treatment of high-boiling products and solids, recovery treatment of water and recovery treatment of steam. The DMAC and DMF waste liquid is concentrated at a temperature within 100 DEG C, and then is subjected to rectification and deacidification at a temperature within 105 DEG C, the whole process is performed at a low temperature, DMAC and DMF cannot be decomposed basically, the recovery rate of DMAC and DMF finished products is more than 99%, and meanwhile, the content of dimethylamine in tower top water is less than 30ppm, so that the problem of water pollution is solved.

Description

technical field [0001] The invention belongs to the field of separation and purification of DMAC or DMF, in particular to a seven-tower five-effect rectification system for DMAC or DMF waste liquid and a recovery method thereof. Background technique [0002] DMAC, also known as N,N-dimethylacetamide, DMF, also known as N,N-dimethylformamide, is an excellent organic solvent, widely used in medicine, pesticide, film industry, leather industry, textile industry and other industries , DMAC or DMF waste liquid is produced while in use. [0003] Because DMAC or DMF is a kind of antibacterial agent, it will also kill the activated sludge in the sewage treatment tank at a low concentration. Therefore, there is no good way to treat DMAC or DMF waste liquid by biochemical treatment. In addition, from an economic point of view, it is the best choice to use rectification to treat DMAC or DMF waste liquid. At present, there are many rectification recovery methods for DMAC or DMF waste l...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C02F9/10C07C231/24C07C233/03C07C233/05C02F103/36
Inventor 章旭元
Owner 常州冀德环保科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com