Ch4n2o H2o

UREA

ch4n2o h2o:

Appearance: Colorless or white needle shaped or rod-shaped crystals, industrial or agricultural products are white with slightly reddish solid particles, odorless and tasteless. The nitrogen content is about 46.67%.

Boiling point: 196.6 ° Cat760mmHg.

Refractive index: n20/D 1.40

Flash point: 72.7 ° C.

Density: 1.335.

Melting point: 132.7 ℃.

Water solubility: 1080 g/L (20 ℃).

Solubility: soluble in water, methanol, formaldehyde, ethanol, liquid ammonia, and alcohol, slightly soluble in ether, chloroform, and benzene. Weakly alkaline.

ch4n2o h2o Preparation method:

Urea is the final product of protein metabolism in mammals. In 1922, industrial production of urea using ammonia and carbon dioxide was achieved in Germany. Ammonia reacts with carbon dioxide to form amine formate, which is then dehydrated to produce urea.

Industrial manufacturing method

Production method: In industry, liquid ammonia and carbon dioxide are used as raw materials to directly synthesize urea under high temperature and high pressure conditions. The chemical reaction is as follows:

2NH3+CO2 → NH2COONH4 → CO (NH2) 2+H2O.

ch4n2o h2o Purpose:

It can be used in large quantities as a raw material for the production of various products such as melamine, urea formaldehyde resin, hydrazine hydrate, tetracycline, phenobarbital, caffeine, reduced brown BR, phthalocyanine B, phthalocyanine Bx, monosodium glutamate, etc.

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