The Production Process of Sodium dimethyldithiocarbamate

Sodium dimethyldithiocarbamate (SDDC) is an important intermediate in the production of a variety of chemicals, including insecticides, fungicides, and other agricultural products.
The production process of SDDC involves several steps, including the reaction of dimethyldithiocarbamic acid with sodium hydroxide, the neutralization of the resulting sodium dithiocarbamate with hydrochloric acid, and the removal of water by distillation.

The first step in the production of SDDC is the preparation of dimethyldithiocarbamic acid.
This is typically done by reacting dimethylsulfide with carbon disulfide in the presence of a Lewis acid catalyst, such as aluminum chloride.
The resulting dimethyldithiocarbamic acid is then neutralized with sodium hydroxide to produce sodium dimethyldithiocarbamate.

The next step in the production of SDDC is the neutralization of the sodium dimethyldithiocarbamate with hydrochloric acid.
This step is necessary to convert the sodium salt of the dimethyldithiocarbamate into the free acid, which is more easily purified and isolated.
The resulting SDDC is then isolated by filtration and washed with water to remove any residual acid.

The final step in the production of SDDC is the removal of water by distillation.
This is typically done using a simple column still, in which the SDDC is vaporized and condensed back into a liquid form.
The resulting SDDC is then collected and purified by recrystallization or other appropriate methods.

In conclusion, the production process of Sodium dimethyldithiocarbamate involves several steps, including the reaction of dimethyldithiocarbamic acid with sodium hydroxide, the neutralization of the resulting sodium dithiocarbamate with hydrochloric acid, and the removal of water by distillation.
These steps are necessary to produce a high-purity SDDC, which is used as an intermediate in the production of a variety of chemicals, including insecticides, fungicides, and other agricultural products.