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

Method for processing triethylamine method glycine circulating mother liquid according to membrane separation technology

A technology of circulating mother liquor and separation technology, which is applied in the field of chemical production and can solve the problems of low yield and high cost of recovering triethylamine

Inactive Publication Date: 2013-12-04
刘长飞
View PDF0 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the cost of using ammonia is high, and the yield of reclaiming triethylamine is low

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Take 10L of glycine methanol to circulate the mother liquor, add 40L of methanol, and use nanofiltration experimental equipment to concentrate and separate. The nanofiltration equipment chooses the DK--2540 model of General Corporation of the United States, the nanofiltration membrane with a molecular weight cut-off of 100--300 Daltons, the operating pressure is 1.8-2.4Mpa; the operating temperature is 20--40°C; when the nanofiltration intercepted liquid is concentrated When the volume reaches 8L, stop the concentration;

[0019] 42L nanofiltration permeate is returned to the glycine reaction system for recycling;

[0020] Take 4L of nanofiltration retentate, evaporate and recover 3.5L of methanol solution, and dry the remaining solution to obtain 456 grams of chemical fertilizer raw material product.

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 provides a method for processing triethylamine method glycine circulating mother liquid according to the membrane separation technology. Through the trapping performance and the charge performance of a nanofiltration membrane, separation of colored by-products generated in the reaction process of triethylamine hydrochloride, glycine and the mother liquid is achieved. Through the separation of the nanofiltration membrane, most of the triethylamine hydrochloride, most of the glycine and part of urotropine in the glycine reaction circulating mother liquid permeate the nanofiltration membrane to enter nanofiltration percolate, and most of the colored by-products and part of the urotropine are trapped into trapped liquid. The nanofiltration percolate returns to a glycine synthesis system to be recycled.

Description

Technical field: [0001] The invention relates to a production process of glycine by a triethylamine method, belonging to the technical field of chemical production. Background technique: [0002] Triethylamine method glycine takes chloroacetic acid and ammonia as raw materials (or ammonium chloroacetate as raw material), takes methanol (or methanol aqueous solution) as solvent, and under the action of catalyst urotropine, takes triethylamine as acid binding agent, The reaction directly obtains glycine solid product. Calcium oxide is used to recover the acid-binding agent triethylamine for recycling, and calcium chloride solution is obtained at the same time. Calcium chloride solution can be processed to produce calcium chloride products. Calcium chloride solution can also react with concentrated sulfuric acid to obtain calcium sulfate precipitation and hydrogen chloride gas (processing other products or recycling to obtain high-purity hydrochloric acid). The circulating m...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/04C07C29/74C07C211/05C07C209/82B01D61/14C05D3/02
CPCY02P20/582
Inventor 刘长飞李志伟王云鹤
Owner 刘长飞
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