Urea production process with high energy efficiency

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

1997-03-03

1998-12-15

Kumar, Shailendra

Organic compounds -- part of the class 532-570 series

Organic compounds

Amino nitrogen containing

564 67, 564 68, 564 69, 564 70, 564 72, C07C27304

Patent

active

058499520

ABSTRACT:
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 excess ammonia, the gaseous products 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.

REFERENCES:
patent: 3356723 (1967-12-01), Kaasenbrood
patent: 3711454 (1973-01-01), Summerville
patent: 4296252 (1981-10-01), Mavrovic
patent: 4354040 (1982-10-01), Inoue et al.
patent: 4540813 (1985-09-01), van Nassau et al.
patent: 4801745 (1989-01-01), Meessen et al.
patent: 4801746 (1989-01-01), Baenens

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