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

Method for preparing iminodiacetic acid

A technology of iminodiacetic acid and iminodiacetonitrile, which is applied in the field of preparation of iminodiacetic acid, can solve problems such as not having the value of mass production in factories, achieve significant production capacity advantages, reduce labor costs, and reduce labor costs.

Active Publication Date: 2009-09-02
SHANGHAI TAIHE INT TRADE CO LTD
View PDF1 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The process conditions of the above-mentioned prior art are only suitable for preparing a small amount of IDA under laboratory conditions, and do not have the value of large-scale preparation in factories

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
  • Method for preparing iminodiacetic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 Shown, a kind of method for preparing iminodiacetic acid, this method comprises the following steps:

[0026] Iminodiacetonitrile (95%) feed rate: 93kg / h, add in the first hydrolysis kettle H1 with adjustable speed feeder, dropwise add 20% sodium hydroxide simultaneously, drop rate 390kg / h, iminodiacetonitrile The molar ratio to sodium hydroxide is 1:2.1, and the temperature is controlled at 40-50°C. As the reaction progresses, the reaction liquid naturally flows into the second hydrolysis kettle H2 and the third hydrolysis kettle H3. The total retention time in the three hydrolysis kettles H1, the second hydrolysis kettle H2, and the third hydrolysis kettle H3 is 1h, and then the reaction liquid is heated to 105°C with the heat exchanger E1, and then enters the gas-liquid separation tank E2 for gas Liquid separation and ammonia removal at the same time, about 10% of the total weight of water vapor and ammonia will enter the ammonia recovery system, an...

Embodiment 2

[0028] see figure 1 Shown, a kind of method for preparing iminodiacetic acid, the mol ratio of iminodiacetonitrile and sodium hydroxide is 1:2.3 in this method, other adopts the processing step identical with embodiment 1, and hydrolysis yield is 103%.

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 relates to a method for preparing iminodiacetic acid, which takes iminodiacetonitrile as a raw material by continuous hydrolysis and acidification to prepare the iminodiacetic acid. Compared with the prior art, the method has reasonable process and simple operation, and continuously hydrolyzes the iminodiacetonitrile to obtain the iminodiacetic acid; the obtained product has high yield and purity; the production efficiency is high; and the method reduces the labor cost, and has obvious productivity advantage and product quality advantage.

Description

technical field [0001] The invention relates to chemical intermediates, in particular to a method for preparing iminodiacetic acid. Background technique [0002] Iminodiacetic acid (IDA) is an important chemical intermediate, which is widely used in pesticides, medicines, rubber, and hard metal cleaning agents. In terms of pesticides, iminodiacetic acid (IDA) is mainly used to prepare glyphosate. In terms of medicine, its complexes are anticancer drugs and important raw materials. At the same time, chelating resins with iminodiacetic acid as a ligand are also widely used in wastewater treatment, enrichment of trace heavy metals, extraction and separation of heavy metals, and enantiomeric resolution. Iminodiacetic acid can also be used in the production of amphoteric chromium complex magenta dyes, pyrazine and 2-aminopyrazine, fuel cleaners, cement retarders, bleach activators for washing products, chemical analysis reagents, and used in the polypropylene market Stabilizers...

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): C07C229/24C07C227/18
Inventor 朱正江王方惠吴敬怀郑留清田晓宏
Owner SHANGHAI TAIHE INT TRADE CO LTD
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