Supercharge Your Innovation With Domain-Expert AI Agents!

Purification method of electronic grade iminodiacetic acid

A technology of iminodiacetic acid and purification method, applied in the field of electronic grade iminodiacetic acid purification, can solve the problems of high metal ion impurity content, unrecyclable mother liquor, low product purity and the like

Inactive Publication Date: 2019-07-12
南通光荣化工有限公司
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the method is mature, the product has low purity and high metal ion content, the mother liquor cannot be recycled, the energy consumption is high, and the wastewater treatment capacity is large.
Its metal ion impurity content is high, which cannot meet the requirements of electronic chemicals

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
  • Purification method of electronic grade iminodiacetic acid
  • Purification method of electronic grade iminodiacetic acid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings. It should be noted here that the descriptions of these embodiments are used to help understand the present invention, but are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

[0017] see figure 1 , this specific embodiment discloses a method for purifying electronic-grade iminodiacetic acid, which is prepared by the following steps to obtain electronic-grade iminodiacetic acid:

[0018] Dissolution: Put 100Kg of industrial grade iminodiacetic acid into an 800L reaction kettle with 450L of pure water, stir and heat to 90°C-95°C, and ensure that the steam pressure is not greater than 0.4MPa during heating to prevent material flushing due to exc...

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 purification method of electronic grade iminodiacetic acid. The purification method is characterized in that the electronic grade iminodiacetic acid is prepared by the following steps: disliquid: feeding the quantitative industrial-grade iminodiacetic acid into pure water, stirring and heating to 90 to 95 DEG C; purification and decoloration: adding a proper amount of oxalic acid and activated carbon into the dissolved liquid of iminodiacetic acid and insulating at 95 DEG C for one hour; filtration: filtering by adopting an ultrafilter, and after filtration, completely compressing the liquid to be out of the ultrafilter with compressed air; cooling crystallization: cooling the material to 25 DEG C with cooling water; dehydration: moving the material cooled to 25DEG C to a centrifuge for dehydrating; drying: moving the dehydrated material to a dryer for drying to obtain a finished product. The purification method disclosed by the invention has the advantagesthat the proper amount of oxalic acid is added in the purification and decoloration section, so that impurity metal ions in the liquid can be effectively reduced; in addition, multiple mechanical application of mother liquid can be achieved, so that energy consumption is reduced and the amount of wastewater is reduced.

Description

technical field [0001] The invention relates to iminodiacetic acid, in particular to a method for purifying electronic-grade iminodiacetic acid. Background technique [0002] Iminodiacetic acid, also known as diglycine and aminodiacetic acid, is an important fine chemical product with strong complexation and can form chelates with various metal ions. It is used in pesticides, pharmaceuticals, chemicals, water It is widely used in processing, medicine, functional polymers, electronics, etc. It is an important raw material for pesticides, pharmaceuticals, rubber, surfactants, complexing agents, food additives, electroplating industry, synthetic metal surface treatment agents and ion exchange resins. and intermediates. With the rapid development and continuous upgrading of the electronic information industry, the quality requirements for electronic chemicals are getting higher and higher, and the content of some impurity metal ions is required to reach the PPb level. [0003]...

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): C07C227/40C07C229/16
CPCC07C227/40C07C229/16
Inventor 贾建
Owner 南通光荣化工有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com