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Process for producing potassium N-methyldithiocarbamate

A technology of methyl dithioamino and potassium formate, which is applied in biocides, chemicals for biological control, nematocides, etc., can solve the problems of low agricultural mechanization and achieve sustainable use, Good effect, saving production cost

Active Publication Date: 2014-06-04
利民化学有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

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  • Process for producing potassium N-methyldithiocarbamate

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Experimental program
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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...

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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

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Application Information

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Patent Type & Authority Patents(China)
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
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