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Dithiocyanomethane (MBT)
[Alias] Methyl dithiocyanate, methylene dithiocyanate
[Structural formula]
N=CS-CH 2 -SC≡N
[Physical and chemical properties] Colorless needle-like crystals
[Preparation method] At present, there are two main methods for synthesizing dithiocyanomethane
① Prepared at 90°C with dibromomethane and sodium thiocyanide as raw materials and water as a solution
Japanese patent JP7606928 uses the above method to prepare dithiocyanomethane, with a yield of 90.
In a 250 mL conical flask, 31.
②With methylene chloride and sodium thiocyanide as raw materials, the reaction formula is as follows:
Tan Shiyu of Chongqing University uses water as the solvent and the phase transfer agent tetrabutylammonium hydroxide to synthesize methyl dithiocyanate with dichloromethane and sodium thiocyanate
Weigh an appropriate amount of sodium thiocyanate and place it in the reaction kettle, add a quantitative amount of distilled water to completely dissolve it, add a metered volume of dichloromethane, seal the reaction kettle, control the stirring speed to 400r/min, heat to the reaction temperature and react for a certain time After that, it was cooled to normal temperature, and the reaction product was collected by filtration
[Technical Index]
[Application] Dithiocyanomethane has a good killing effect on various fungi, algae and bacteria, including aerobic bacteria and anaerobic bacteria, and is widely used in the treatment of industrial circulating water, aquaculture water, and oilfield water injection
Dithiocyanmethane will slowly decompose in water, and the decomposition products are thiocyanate and formaldehyde , so its residual toxicity is very small
When treating aquaculture water with dithiocyanomethane, it has a high-efficiency killing effect on the main bacteria, fungi and algae in the water, and the efficacy is maintained for a long time, and the applicable pH value and temperature range are wide
Related link: Application of n-octyl isothiazolinone (DCOIO)