Process of preparing melamine

Details Process of preparing melamine Process of preparing melamine

1982-04-16

1983-10-04

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

044080468

ABSTRACT:
An improved process for the preparation of melamine from urea or thermal decomposition products thereof. A melamine containing reaction mixture is cooled with an aqueous medium to form an aqueous product stream containing melamine and reaction by-products. Product melamine is separated from the aqueous product stream leaving a residual aqueous stream which is recycled into the process. A portion of this residual aqueous stream still containing reaction by-product is treated to remove by-products therefrom prior to being recycled to the process.

REFERENCES:
patent: 3496176 (1970-02-01), Kennedy
patent: 3598818 (1971-08-01), Krekels
patent: 4156080 (1979-05-01), Van Hardeveld

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