process for the synthesis of urea from ammonia and carbon dioxide to total carbon dioxide conversion

摘要

a process is described for the synthesis of urea to nh3 and co2 conversion in total co2.that includes: a) food countercurrent reactive distillation in a column of nh3 on the bottom and the co2 in the central area, and of a liquid stream containing urea.nh3 and water and a gas stream and / or supercritical consisting of nh3 and water; (b) feeding the liquid stream from the bottom of the distillation column for reactive with one or moreof separationgetting current containing nh3 and a stream containing urea to be sent to the next stage of prilling; (c) feeding the gas stream and / or supercritical from the head of the columnreactive distillation in a column of reactive distillation in a distillation column for the fund are separate the water and the head of the nh3.