Melamine of improved purity produced by high-pressure, non-catal

Details Melamine of improved purity produced by high-pressure, non-catal Melamine of improved purity produced by high-pressure, non-catal

1995-06-07

1996-05-07

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Four or more ring nitrogens in the bicyclo ring system

C07D25160

Patent

active

055147968

ABSTRACT:
A high-pressure, non-catalytic process for producing melamine from urea wherein the melamine is recovered directly as a dry powder without washing or recrystallization is described. In the process, liquid melamine is fed to a cooling unit where it is quenched with a liquid medium, preferably liquid ammonia. By increasing the pressure within the cooling unit to a pressure in excess of 600 psi and preferably to 1200 to 1400 psi provides melamine having a purity in excess of 99%.

REFERENCES:
patent: 4565867 (1986-01-01), Thomas

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