Mixed Dialkyl Thiourea

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Thiourea

Nature of mixed dialkyl thiourea:

mixed dialkyl thiourea is a colorless crystalline solid with a special sour odor.

- It has good solubility and is soluble in polar solvents such as water, alcohols and ethers.

Thiourea can be decomposed at high temperatures to produce mercaptan and formamide products.

Method of mixed dialkyl thiourea:

The preparation method is to react barium sulfide with sulfuric acid or hydrochloric acid, and the hydrogen sulfide gas is absorbed by the negative pressure of the stone ash emulsion to obtain a solution of calcium hydrogen sulfide. It is then reacted with calcium cyanamide, and the molar ratio of calcium hydrogen sulfide to calcium cyanamide is 1:5. Under continuous stirring, the reaction temperature is (80 ± 5) ℃, and the reaction time is 3 hours. After negative pressure filtration, a thiourea liquid can be generated, which is then evaporated, filtered, cooled, and crystallized to obtain crystalline thiourea. The finished product is obtained by centrifugal dehydration and drying. The reaction equation is as follows: BaS+H2SO4 → BaSO4 ↓+H2S ↑

2H2S+Ca (OH) 2 → Ca (SH) 2+2H2O

Usage of mixed dialkyl thiourea:

-Thiourea is commonly used as a promoter and vulcanizer in the preparation of synthetic rubber.

-Thiourea can also be used as a reagent in dyes, pesticides, and electroplating industries.

Operation precautions of mixed dialkyl thiourea:

Closed operation, local ventilation. Operators must undergo specialized training and strictly adhere to operating procedures. It is recommended that operators wear self-priming filter dust masks, chemical safety goggles, and rubber gloves. Stay away from sparks and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Avoid generating dust. Avoid contact with oxidants and acids. When handling, it is important to load and unload with care to prevent damage to the packaging and containers. Equip corresponding types and quantities of fire-fighting equipment and emergency response equipment for leaks. Empty containers may have residual harmful substances.

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