公开(公告)号：US20200283377A1

公开(公告)日：2020-09-10

申请号：US16472792

申请日：2018-07-13

申请人： STAMICARBON B.V.

发明人： Juan COLOMA GONZÁLEZ ,  Johannes Henricus MENNEN

IPC分类号： C07C273/16 ,  B01D53/58 ,  B01D53/73 ,  B01D47/10 ,  B01J2/04 ,  B01J4/00

摘要： The invention pertains to a finishing process for urea-comprising material, a plant for finishing urea-comprising material, a method of modifying an existing plant, and a use. Methods are disclosed for preventing the clogging of the conduit for off-gas between the finishing section and the treatment section.

公开(公告)号：US20190015811A1

公开(公告)日：2019-01-17

申请号：US15576214

申请日：2017-03-30

申请人： STAMICARBON B.V.

发明人： Juan COLOMA GONZÁLEZ ,  Luc Louis Maria DIELTJENS ,  Johannes Henricus MENNEN

IPC分类号： B01J19/18 ,  B01D5/00 ,  C07C273/04 ,  C07C275/02

CPC分类号： B01J19/1837 ,  B01D3/06 ,  B01D3/14 ,  B01D5/006 ,  B01D2257/406 ,  B01D2257/504 ,  B01J19/24 ,  B01J2219/00006 ,  B01J2219/00018 ,  B01J2219/00024 ,  B01J2219/00038 ,  B01J2219/0004 ,  B01J2219/00051 ,  B01J2219/00087 ,  B01J2219/00092 ,  B01J2219/00162 ,  C07C273/04 ,  C07C275/02 ,  Y02P20/582

摘要： Disclosed is a urea plant wherein, in deviation from conventional plants, a high-pressure synthesis section is operated with two different pressures. The synthesis section comprises a reactor, which is operated under a first high pressure. The synthesis section also comprises a stripper and a condenser, both operated at substantially the same second high pressure. In accordance with the invention, the first pressure is substantially higher than the second pressure. The disclosed plant particularly comprises a compression unit capable of converting a pressure difference into work, or more specifically, mechanical energy for compression. This compression unit is positioned between a liquid outlet of the condenser and a liquid inlet of the reactor, and in fluid communication therewith. In order to make use of a pressure drop (expansion as a result of a liquid being depressurized), said compression unit is configured to obtain compression energy from one or more events in the urea production process (i.e., at one or more points in the urea production plant), at which a loss of energy occurs, such as decompression of a high energy stream. Typically, the compression unit is thereby configured to utilize mechanical energy recovered from a decompression unit positioned downstream of the stripper and upstream of the recovery section.