Methods of Preparation of Urea Preparation and Properties

Methods of Preparation of Urea Preparation and Properties

→ Wohler Method : Reaction of ammonium sulphate and potassium cyanate gives ammonium cyanate which on rearrangement gives urea.

Methods of Preparation of Urea Preparation and Properties 1

→ Laboratory Method : In laboratory liquid ammonia react with carbonyl chloride or ethyl carbonate or ethyl urethane and give urea.

Methods of Preparation of Urea Preparation and Properties 2

→ Industrial Method : Carbon dioxide and liquid ammonia react to form ammonium carbamate which decomposes at high pressure and high temperature to give urea.

Methods of Preparation of Urea Preparation and Properties 3

→ From Cyanamide : At high temperature, calcium carbide reacts with nitrogen to form calcium cyanamide which on neutralisation with H2SO4 gives cyanamide which on hydrolysis gives urea.

Methods of Preparation of Urea Preparation and Properties 4

Chemistry Notes

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