C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
23/394, 260/557.
C07C 273/14 (2006.01) B01D 1/06 (2006.01) B01D 1/22 (2006.01) C07C 273/04 (2006.01) C07C 273/16 (2006.01) F28F 13/04 (2006.01)
Patent
CA 1333912
The invention relates to a process for concentrating a urea solution passing as a film along the inside of the tubes of a vertical tube bundle the heat required being substantially generated by condensation of a gas mixture in an area provided around the bundle of tubes, the gas mixture being supplied to the area near one end of the tube bundle and the urea solution to the other end of the tube bundle, and being passed substantially up- wards through the heating area and it is ensured that the gas mixture or condensate cannot flow back. The invention also relates to an apparatus for carrying out the process wherein the heating area is divided into compartment by means of horizontal baffles allowing an upwardly directed flow of the gas mixture and the condensate. In this way heat generated from the process flow is utilized.
550625
Burks Henk C.
Jonckers Kees
Dsm Ip Assets B.v.
Fetherstonhaugh & Co.
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