Urea production process with high energy efficiency

Details Urea production process with high energy efficiency Urea production process with high energy efficiency

C - Chemistry, Metallurgy

07

C

260/548.1

C07C 273/04 (2006.01)

Patent

CA 2023316

A urea production process with high energy efficiency, in which the urea solution obtained from the synthesis stage is subjected to a first stage of high pressure thermal decomposition of the ammonium carbamate which has not undergone conversion to urea together with simultaneous self-stripping by the excess ammonia, the gaseous products deriving from said decomposition being condensed in two stages at different temperatures, in the first of which the heat is directly transferred to a second ammonium carbamate decomposition stage which is divided into two parts, namely a first thermal decomposition part and a second part consisting of adiabatic stripping with part of the carbon dioxide feed to the process.

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