Process for producing urea

Details Process for producing urea Process for producing urea

1980-01-18

1981-03-17

Hearn, Brian E.

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

Organic compounds

Amino nitrogen containing

C07C12600

Patent

active

042566622

ABSTRACT:
Urea is synthesized from ammonia and carbon dioxide at increased pressure and elevated temperature. The unconverted starting components are separated and recycled to the synthesis stage and the resulting urea solution is vacuum thickened. The liquor vapor resulting from the vacuum-thickening is condensed under a pressure of from 0.04 to 0.90 ata by means of indirect cooling water, followed by contacting the uncondensed liquor vapor with an aqueous solution of the unconverted starting feed at a temperature of from 10.degree. to 60.degree. C. and pressure of from 1.5 to 18 ata for subsequent absorption condensation. The process according to the present invention makes it possible to reduce the rate of consumption of steam (per ton of urea) by 0.1-0.25 t/t and the rate of consumption of the cooling return water by 6 to 14 m.sup.3 /t.

REFERENCES:
patent: 3317601 (1967-05-01), Otsuka
patent: 3922222 (1975-11-01), Van Moorsel
patent: 4053507 (1977-10-01), Inoue
Chemical Abstracts, vol. 78 (1973), Nos. 3754v, 3755w.
Weyermuller et al., "Dutch Urea Process", Chemical Processing, 9/24/62, pp. 19-23.

Affiliated with

Also associated with

Rating

Process for producing urea does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for producing urea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for producing urea will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1645444