Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1996-05-23
1998-06-16
Kumar, Shailendra
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564 66, 564 67, 564 70, C07C27304
Patent
active
057673136
ABSTRACT:
The present invention relates to a process and apparatus for the preparation of urea, and in particular for urea obtained from ammonium carbamate formulated from carbon dioxide and ammonia at a pressure of about 125 bar to about 350 bar in a urea synthesis solution in a urea reactor. The reactor defines a horizontally arranged condensation zone and contains a heat exchanger. According to this process, NH.sub.3 and CO.sub.2 are supplied to the reactor and are largely absorbed into the urea synthesis solution. A substantial portion of the heat formed in the condensation is discharged by means of the heat exchanger. The residence time of the urea synthesis solution in the reactor preferably is selected so that at least about 85% of the theoretically obtainable amount of urea is prepared. Thereafter, the urea synthesis solution can be processed into a urea solution or solid urea.
REFERENCES:
patent: 3024280 (1962-03-01), Braun
patent: 3686305 (1972-08-01), Otsuka et al.
patent: 4670588 (1987-06-01), Zardi
Inoue, et al., "Equilibrium of Urea Synthesis. I.", Bulletin of The Chemical Society of Japan, vol. 45, No. 5, pp. 1339-1345 (1972).
Gorlovski, et al., "Equation For Determination Of The Equilibrium Degree of Co.sub.2 Conversion During Synthesis of Urea", Journal of Applied Chem. of the USSR 54, 10, pp. 1898-1901 (1981).
Inoue et al., "Equilibrium Of Urea Synthesis. II.", Bulletin of The Chemical Society of Japan, vol. 45, No. 6, pp. 1616-1619 (1972).
DSM N.V.
Kumar Shailendra
LandOfFree
Method for the preparation of 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 Method for the preparation of urea, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the preparation of urea will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1727383