Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1976-09-22
1978-05-09
Meros, Edward J.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C12602
Patent
active
040886859
ABSTRACT:
Heat recovery and conversion of reactants to urea are improved in adiabatic and in isothermal urea synthesis systems. Ammonia, carbon dioxide and ammonium carbamate feed streams are charged to the lower portion of a reactor, which has indirect heat exchange means positioned therein extending from the lower portion to the upper portion and which includes a heat exchange medium. Said means has a first header positioned in said upper portion, a second header positioned in the lower portion, and conduit means interconnecting the headers for passing the medium therebetween. Heat of reaction of the feed streams is imparted to the medium in the second header. The resulting reaction mixture is passed to the upper reactor portion, as is the heated medium to the first header, with heat of the medium being transferred to the reaction mixture as it is so passed.
REFERENCES:
patent: 3072721 (1963-01-01), Grossmann
Kirk-Othmer, Encyclopedia of Chemical Technology, vol. 21, 1970, pp. 37-51.
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