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1985 Jonckers Unie van Kunstmest 4539077 Urea Process

This patent describes a urea process with a feature to further concentrate the carbamate stream going to the synthesis section, so recycling less water to the reactor. This is realized by introducing a washing column and medium pressure carbamate condenser operating at about 18 bars. Also the hydrolyser off gases are introduced in the medium pressure carbamate condenser.

 

 

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