Stamicarbon B.v.

Luc Louis Maria Dieltjens

Fredericus Henricus Maria Buitink

Johannes Henricus Mennen

Juan Coloma González

Juan Coloma GONZÁLEZ

The invention relates to a urea plant with a COand a NHfeed, which comprises a purge line, characterized in that the purge line is connected with a fuel gas input line of a utility plant or an NHplant.

Urea plant

The invention is directed to a urea plant with a high pressure synthesis section and a recovery section. The high pressure synthesis section comprises a reactor, a stripper and a condenser, wherein the reactor operates at a higher pressure than the stripper and the condenser. The plant further includes a compression unit between the condenser and the reactor. The compression unit utilizes mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.

Urea production with bi-pressurized synthesis

Disclosed is a method of increasing the capacity of an existing urea plant. With reference to the regular components of a urea plant, including a synthesis section comprising a high pressure carbamate condenser and a reactor, and a recovery section, the method comprises installing an additional reactor between the recovery section and the high pressure carbamate condenser. The additional reactor is preferably installed in connection with an ejector, so as to allow ground placement of the additional reactor.

Urea plant revamping method

Disclosed is a urea plant comprising an additional reactor. With reference to the regular components of a urea plant, including a recovery section and a high pressure carbamate condenser, the additional reactor is positioned between the recovery section and the high pressure carbamate condenser. The invention also relates to a process for the synthesis of urea, comprising an additional reaction step converting, at an earlier stage than conventional, recovered carbamate into urea.

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Sittard, Netherlands

Luc Louis Maria Dieltjens