Product performance and production principle of urethane

Ethyl carbamate (ethylcarbamate) is also known as urethane, urethane, and urethane.
The molecular formula is C ₃ H ₇ NO ₂ , the molecular weight is 89.
09, and the structural formula is

1.

Colorless or white crystal; melting point 49℃, boiling point 182～184℃, sublimation at 103℃(54×133.
3Pa), relative density (d ₄ ²¹ ) 0.
9862, flash point 92℃; easily soluble in water, ethanol , ether , Chloroform and benzene
.

2.
Production principle

After salting with urea and nitric acid , it is alcoholyzed with ethanol, sodium nitrite and sulfuric acid to obtain carbamate
.

3.

4.

5.

Alcoholysis pot, storage tank, filter, vacuum distillation kettle, decolorization kettle, drying box
.

6.
Production process

In the reaction pot, add absolute ethanol and urea, and add nitric acid dropwise at 40°C to obtain a urea nitrate solution
.

7.
Product standard (chemically pure)

8.

This product is used as an intermediate of medicines, pesticides and spices, used in the production of hypnotics, tranquilizers, antidote for brucine, resorcinol, fungicides, cosolvents for injections, and colorants for printing and dyeing industries
.

9.
Safety measures

(1) When using nitric acid, sodium nitrite, ethanol and other corrosive, toxic or irritating raw materials in production, the equipment should be sealed, the operators should wear labor protection equipment, and the workshop should be ventilated
.

(2) This product is toxic
.