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Production method for dithiocyano-methane

A dithiocyanomethane and production method technology, applied in the direction of organic chemistry, etc., can solve the problems of low dithiocyanomethane content, poor dithiocyanomethane quality, high production cost, etc., achieve wide application and improve pulp output The effect of low production rate and production cost

Inactive Publication Date: 2009-09-02
XINGNING FINE CHEM FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, dibromomethane, sodium thiocyanate, and methanol are generally used as raw materials for the production of dithiocyanomethane. The quality of dithiocyanomethane produced is poor, the content of dithiocyanomethane is low, the consumption ratio is high, the production cost is high, and the use is narrow.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0021] Dithiocyanomethane [molecular formula: CH 2 (SCN) 2 ] The production method specifically comprises the steps:

[0022] 1. Synthesis

[0023] Select 85% sodium thiocyanate, 85% dichloromethane and water as raw materials, put sodium thiocyanate, dichloromethane and water into the reactor at a weight ratio of 2:2:6, and then seal the reactor. Open the steam valve (the steam pipe is connected to the steam inlet of the reaction kettle), so that the steam enters the jacket in the reaction kettle for heating, and starts the stirring button on the reaction kettle to stir the reactants. When the temperature rises to 85°C and the pressure When the temperature is 0.6MPa, turn off the steam and keep the temperature for continuous synthesis for 6 hours, then drop to normal temperature;

[0024] 2. Crystallization

[0025] Put the material in the reaction kettle into the crystallization kettle, start the cooling water of the crystallization kettle to cool down, and at the same ti...

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Abstract

The invention discloses a production method for dithiocyano-methane. The dithiocyano-methane is prepared by condensation of sodium sulfocyanate and methylene dichloride in medium water and a sealed reaction kettle, and the production method comprises the steps of synthesis, crystallization, filtration, washing, secondary filtration, product refining, drying and the like. The production method has the advantages that the dithiocyano-methane produced by the method has high content, low loss rate, low production cost and wide application.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a production method of dithiocyanomethane. Background technique [0002] At present, dibromomethane, sodium thiocyanate, and methanol are generally used as raw materials for the production of dithiocyanomethane. The quality of dithiocyanomethane produced is poor, the content of dithiocyanomethane is low, the consumption ratio is high, the production cost is high, and the use is narrow. . Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention provides a production method of dithiocyanomethane. The dithiocyanomethane produced by the method has high content, low consumption ratio, low production cost and wide application. [0004] The present invention is realized through the following technical solutions: a dithiocyanomethane [molecular formula: CH 2 (SCN) 2 ] production method, formed by condensation of sodium thiocyanate and dichlorome...

Claims

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Application Information

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IPC IPC(8): C07C331/04
Inventor 陈文涤钟辉华
Owner XINGNING FINE CHEM FACTORY
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