Chemistry: physical processes – Physical processes – Crystallization
Patent
1993-07-28
1994-05-31
Straub, Gary P.
Chemistry: physical processes
Physical processes
Crystallization
23295R, 23313R, 23313P, 564 66, 564 70, 4234151, 423420, B01D 900, C01B 300, C07C27300
Patent
active
053165543
ABSTRACT:
Ammonium carbamate, in solution with urea, water and ammonia and under high temperature and pressure is cooled to below its crystallization temperature while being subjected to an elevated pressure. The crystallized substance formed is then dried, crushed, and pelletized with the aid of a binding agent to produce pellets having substantial strength and stability, and having particular utility as a deicer for roadways.
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