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Product performance and production principle of urethane

 Last Update: 2021-08-14
 Source: Internet
 Author: User

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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

Product performance

Colorless or white crystal; melting point 49℃, boiling point 182～184℃, sublimation at 103℃(54×133.
3Pa), relative density (d ₄²¹ ) 0.
9862, flash point 92℃; easily soluble in water, ethanol , ether , Chloroform and benzene
.

Odorless, cool and salty; toxic

2.
Production principle

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

Process flow

Technical formula (kg/t)

Main equipment

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
.

Sodium nitrite was added to the urea nitrate solution, and the reaction was stirred at 72～74℃ for 2h

7.
Product standard (chemically pure)

Product use

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
.

It has anti-cancer properties and is also used for multiple myeloma and chronic leukemia

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
.

Packed in plywood barrels lined with plastic bags, stored in a cool, dry place away from light, protected from moisture and heat
.
Store and transport in accordance with toxic chemicals regulations
.

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