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

Process for producing potassium N-methyldithiocarbamate

A technology of methyl dithiocarbamic acid and methyl dithioamino group, which is applied in the field of production technology of potassium N-methyldithiocarbamate, can solve the problems of low degree of agricultural mechanization, and achieve the goal of using Sustainability, high concentration, and operability

Active Publication Date: 2012-03-28
利民化学有限责任公司
View PDF3 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of the economic level, especially the low degree of agricultural mechanization, it has not been widely applied in my country.

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
  • Process for producing potassium N-methyldithiocarbamate
  • Process for producing potassium N-methyldithiocarbamate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] combined with figure 1 To specifically illustrate the production process of the present invention.

[0019] First, 40%wt monomethylamine aqueous solution containing 0.95 mole of monomethylamine was gradually added dropwise into 1.05 mole of carbon disulfide and reacted at 15~45°C for 2~3h to obtain N-methyldithiocarbamic acid. Since this reaction is an exothermic reaction, it is necessary to increase cooling and control the rate of addition during the reaction to ensure that the reaction temperature does not exceed 45°C.

[0020] Then, add 30%wt potassium hydroxide aqueous solution containing 1.0 moles of potassium hydroxide and carry out neutralization reaction at 35~45°C for 3h to obtain N-methyldithiocarbamic acid potassium solution to obtain N-methyldithiocarbamate The mass percent concentration of the potassium carbamate solution was 52.3%, and the yield was 98.0%. Then, after putting the reaction solution into the middle tank of the cone and standing for stratif...

Embodiment 2

[0024] combined with figure 1 To specifically illustrate the production process of the present invention.

[0025] First, 40%wt monomethylamine aqueous solution containing 0.97 mole of monomethylamine was gradually added dropwise into 1.1 mole of carbon disulfide and reacted at 15~45°C for 2~3h to obtain N-methyldithiocarbamic acid. Since this reaction is an exothermic reaction, it is necessary to increase cooling to control the rate of addition during the reaction, so as to ensure that the reaction temperature does not exceed 45°C.

[0026] Then, add 30% potassium hydroxide aqueous solution containing 1.02 moles of potassium hydroxide and carry out neutralization reaction at 35~45°C for 2 hours to obtain N-methyldithiocarbamic acid potassium solution to obtain N-methyldithioamine The mass percentage concentration of potassium formate solution is 55.6%, yield 98.3%

[0027] Then, after putting the reaction solution into the middle tank of the cone and standing for stratifica...

Embodiment 3

[0031] combined with figure 1 To specifically illustrate the production process of the present invention.

[0032] First, 40%wt monomethylamine aqueous solution containing 0.99 mole of monomethylamine was gradually added dropwise into 1.2 mole of carbon disulfide and reacted at 15~45°C for 2~3h to obtain N-methyldithiocarbamic acid. Since this reaction is an exothermic reaction, it is necessary to increase cooling to control the rate of addition during the reaction, so as to ensure that the reaction temperature does not exceed 45°C.

[0033] Then, add 30% potassium hydroxide aqueous solution containing 1.05 moles of potassium hydroxide and carry out neutralization reaction at 35~45°C for 2 hours to obtain N-methyldithiocarbamic acid potassium solution to obtain N-methyldithioamine The mass percentage concentration of potassium methionate solution is 60%, yield 98.9%

[0034] Then, after putting the reaction solution into the middle tank of the cone and standing for stratific...

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 process for producing potassium N-methyldithiocarbamate, which is implemented by carrying out hybrid reaction on carbon disulfides and monomethylamine so as to obtain an N-dimethyldithiocarbamic acid, and then reacting the obtained N-dimethyldithiocarbamic acid with potassium hydroxides so as to obtain the potassium N-methyldithiocarbamate. The process disclosed by the invention has the advantages of low cost, easily-controlled technological process, easily-controlled end product quality and high purity and yield.

Description

technical field [0001] The invention relates to a production method of Potassium methyldithiocarbamate solution of N-methyldithiocarbamate potassium salt. Background technique [0002] Potassium N-methyldithiocarbamate is a methylamine derivative. Its common name in English is metham-sodium. Its common dosage form is a 35% aqueous solution between dark red and amber. Reports about its bactericidal activity are found abroad, but there are few domestic reports. For decades, its use has been increasing in countries with a high degree of agricultural mechanization such as the United States and Western Europe. Due to the influence of the economic level, especially the low degree of agricultural mechanization, the potassium salt of canopy line has not been widely applied in our country. However, from the practical application history of foreign countries, with the continuous transformation of my country's agriculture from manual labor to mechanized operation, there is a great pr...

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): C07C333/16A01P5/00
Inventor 孙敬权徐勤江尹拥军许婷婷孙丽梅陈婧车芳丽郑明
Owner 利民化学有限责任公司
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