Process for concentrating urea solution under vacuum

Details Process for concentrating urea solution under vacuum Process for concentrating urea solution under vacuum

1991-04-18

1993-12-28

Manoharan, Virginia

Concentrating evaporators

Processes

Involving urea

159 31, 159DIG16, 203 91, 203DIG11, 564 73, 95261, B01D 100

Patent

active

052736237

ABSTRACT:
Process for vacuum-concentrating urea solutions in which the final step of evaporation of the urea solution under vacuum is carried out within the injection of overheated water vapor in the overhead portion of the concentrator, in order to counteract the formation and deposition of high-melting, fouling compounds derived from urea.

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patent: 4285830 (1981-08-01), Muller
patent: 4539077 (1985-09-01), Jonckers et al.

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