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

Method for extracting methyl o-phenylendiamine from TDI organic residue and synthesizing TTA using same

A technology for methyl-o-phenylenediamine and methylbenzotriazole, which is applied in the field of chemistry and achieves the effects of less by-products, easy control and low production cost

Active Publication Date: 2006-10-11
沧州大化新星工贸有限责任公司
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the deficiencies in the prior art and effectively solve the problem of development and utilization of TDI hydrogenated organic residues, the invention provides a method for extracting toluene diamine from TDI organic residues and using it to synthesize tolyltriazole , so that it has the advantages of simple and convenient process, low production cost, high recovery rate, good product quality, less by-products and high purity, which is conducive to protecting the environment and utilizing resources

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 extracting methyl o-phenylendiamine from TDI organic residue and synthesizing TTA using same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Take 1700Kg of organic residue with 90% OTD content in TDI hydrogenated organic residue as an example. The organic residue is stored in a 200Kg iron drum. The specific extraction process is as follows:

[0025] a. Dissolution process: Put 1700Kg TDI organic residue in chemical material tank 1 first, open the steam heating valve to pass the heat source into chemical material tank 1, and control the chemical material water temperature at 85~90℃ for 9 hours, after the organic residue is completely dissolved , Sent to the purification and distillation still;

[0026] b. Purification and refining process: under the process conditions of controlling the organic residue material temperature in the purification and rectification kettle 3 at 172°C and the vacuum degree of 200Pa, the ratio of receiving and reflux is controlled to be 6.0:4.5, and the content of received methyl o-phenylenediamine is above 99.2% A total of 1516Kg of methyl o-phenylenediamine product with a content of 99...

Embodiment 2

[0028] Taking 2520Kg of organic residue with 97% OTD content in TDI hydrogenation residue as an example, the specific extraction procedure is as follows:

[0029] a. Dissolution process: Put 2520Kg of TDI organic residue into the chemical material tank 1, open the steam heating valve to pass the heat source into the chemical material tank 1, and control the chemical material water temperature at 90°C for 7.5 hours. After the organic residue is completely dissolved, Send to the purification and distillation process;

[0030] b. Purification and refining process: under the process conditions of the organic residue material temperature in the purification and rectification kettle 3 at 175°C and the vacuum degree of 180Pa, the receiving and reflux ratio is controlled to be 7.2:3.8, and the content of the received methyl o-phenylenediamine is more than 99.4%. A total of 2430Kg of methyl-o-phenylenediamine product with a content of 99.43% was extracted, and the recovery rate was 99.41%....

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 of extracting methyl o-phenylenediamine from TDI organic bottom and synthesizing TTA by it, solving development and utilization problem of TDI organic bottom. Using TDI organic bottom as raw material, in a certain temperature and pressure, using the method of dissolution and vacuum extract distillation to extract methyl o-phenylenediamine from TDI organic bottom, medium pressure one-step synthesizing methylbenzene-trinitrogen azoles sodium salt by extracted methyl o-phenylenediamine and excess erinitrit solution, and then by acidification, poaching, vacuum hydroextraction, distillation and purification to produce methylbenzene-trinitrogen azoles TTA product. The material temperature of TDI organic bottom in purification process is 160-190deg C,the evacuation in still is 50-380Pa,the synthesized process of TTA is in temperature 250+-20deg C, pressure 4.6-5.2Mpa, synthesis reacting for 3.5-4h in constant temperature and constant pressure. It is adapted for comprehensive development and utilization of organic bottom, environmental conservation and resoure utilization.

Description

Technical field [0001] The invention relates to a process method for extracting chemical raw materials from residues in the chemical industry and its utilization in the field of chemical technology, in particular to extracting methyl o-phenylenediamine from TDI organic residues and synthesizing tolyltriazole by using the same TTA method. Background technique [0002] With the increasing development of the chemical industry and the rapid advancement of science and technology, the comprehensive development and utilization of residues in the chemical industry is becoming more and more important. In the known technology, the industrial production process of TDI (toluene diisocyanate) is mainly divided into toluene nitration, hydrogenation and photochemical processes. The products are ortho-, para-isomers and a small amount of meta-isomers. When the ortho- and para-nitrotoluenes are subjected to secondary nitration, the raw materials required for the production of TDI are generated-2,...

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): C07D249/18C07C209/86C07C211/51
Inventor 陈淑霞刘华光
Owner 沧州大化新星工贸有限责任公司
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