公开(公告)号：NO163097B

公开(公告)日：1989-12-27

申请号：NO863211

申请日：1986-08-08

Applicant: STAMICARBON

Inventor： MEESSEN JOZEF HUBERT ,  SIPKEMA RUDOLF

IPC: C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C126/02

Abstract: Process for the preparation of urea in which- a urea synthesis solution containing carbamate and free ammo­nia is formed in a high-pressure part in a synthesis zone at an NH₃/CO₂ molar ratio of up to 4 : 1, a temperature of at least 175 ◊C and the corresponding pressure,- a portion of the carbamate is decomposed in a first decom­position stage at synthesis pressure or lower pressure by a stripping treatment with carbon dioxide while heating is applied, and the gas mixture thus obtained is at least in part condensed and the condensate and the non-condensed por­tion of the gas mixture, if any, are returned to the synthe­sis zone,- in at least two further decomposition stages a further por­tion of the carbamate still present is decomposed and the gas mixture formed is separated, in the first of the further decomposition stages a pressure of 12-30 bar being maintained and heat being supplied,- and the remaining urea-containing solution is processed further by evaporation to a concentrated urea solution and, if desired, solid urea.The gas mixture, formed on expansion of the stripped urea synthesis solution to a pressure equal to or higher than the pressure in the first one of the further decomposition stages, is brought into direct contact in a contact zone with the solution remaining after further amounts of carbamate still present have herein been decomposed and the gases thus formed have been separated. The remaining gas mixture is thereafter discharged from the contract zone and is condensed. The con­densate is returned to the high-pressure part of the urea synthesis.

公开(公告)号：ZA865985B

公开(公告)日：1987-03-25

申请号：ZA865985

申请日：1986-08-08

Applicant: STAMICARBON

Inventor： MEESSEN JOZEF HUBERT ,  SIPKEMA RUDOLF

IPC: C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C

Abstract: Process for the preparation of urea in which- a urea synthesis solution containing carbamate and free ammo­nia is formed in a high-pressure part in a synthesis zone at an NH₃/CO₂ molar ratio of up to 4 : 1, a temperature of at least 175 ◊C and the corresponding pressure,- a portion of the carbamate is decomposed in a first decom­position stage at synthesis pressure or lower pressure by a stripping treatment with carbon dioxide while heating is applied, and the gas mixture thus obtained is at least in part condensed and the condensate and the non-condensed por­tion of the gas mixture, if any, are returned to the synthe­sis zone,- in at least two further decomposition stages a further por­tion of the carbamate still present is decomposed and the gas mixture formed is separated, in the first of the further decomposition stages a pressure of 12-30 bar being maintained and heat being supplied,- and the remaining urea-containing solution is processed further by evaporation to a concentrated urea solution and, if desired, solid urea.The gas mixture, formed on expansion of the stripped urea synthesis solution to a pressure equal to or higher than the pressure in the first one of the further decomposition stages, is brought into direct contact in a contact zone with the solution remaining after further amounts of carbamate still present have herein been decomposed and the gases thus formed have been separated. The remaining gas mixture is thereafter discharged from the contract zone and is condensed. The con­densate is returned to the high-pressure part of the urea synthesis.

公开(公告)号：NO863211L

公开(公告)日：1987-02-13

申请号：NO863211

申请日：1986-08-08

Applicant: STAMICARBON

Inventor： MEESSEN JOZEF HUBERT ,  SIPKEMA RUDOLF

IPC: C07C67/00 ,  C07C239/00 ,  C07C273/04 ,  C07C126/00

Abstract: Process for the preparation of urea in which- a urea synthesis solution containing carbamate and free ammo­nia is formed in a high-pressure part in a synthesis zone at an NH₃/CO₂ molar ratio of up to 4 : 1, a temperature of at least 175 ◊C and the corresponding pressure,- a portion of the carbamate is decomposed in a first decom­position stage at synthesis pressure or lower pressure by a stripping treatment with carbon dioxide while heating is applied, and the gas mixture thus obtained is at least in part condensed and the condensate and the non-condensed por­tion of the gas mixture, if any, are returned to the synthe­sis zone,- in at least two further decomposition stages a further por­tion of the carbamate still present is decomposed and the gas mixture formed is separated, in the first of the further decomposition stages a pressure of 12-30 bar being maintained and heat being supplied,- and the remaining urea-containing solution is processed further by evaporation to a concentrated urea solution and, if desired, solid urea.The gas mixture, formed on expansion of the stripped urea synthesis solution to a pressure equal to or higher than the pressure in the first one of the further decomposition stages, is brought into direct contact in a contact zone with the solution remaining after further amounts of carbamate still present have herein been decomposed and the gases thus formed have been separated. The remaining gas mixture is thereafter discharged from the contract zone and is condensed. The con­densate is returned to the high-pressure part of the urea synthesis.

公开(公告)号：CA2871771C

公开(公告)日：2018-04-03

申请号：CA2871771

申请日：2013-05-02

Applicant: STAMICARBON

Inventor： MENNEN JOHANNES HENRICUS ,  MEESSEN JOZEF HUBERT

IPC: C07C273/04

Abstract: Disclosed is a plant for the production of urea. The plant comprises conventional sections for synthesis and recovery, for evaporation and condensation, for urea finishing, and for dust scrubbing. According to the invention, an additional evaporation and condensation loop is introduced from and to the dust scrubbing section. This loop results in a more favorable energy consumption of the plant.

公开(公告)号：HRP20171925T1

公开(公告)日：2018-02-23

申请号：HRP20171925

申请日：2017-12-13

Applicant: STAMICARBON

Inventor： GEVERS LAMBERTUS WILHELMUS ,  MEESSEN JOZEF HUBERT ,  MENNEN JOHANNES HENRICUS

IPC: C07C273/04

公开(公告)号：AP3891A

公开(公告)日：2016-11-10

申请号：AP2014008082

申请日：2013-05-02

Applicant: STAMICARBON

Inventor： VAN DEN TILLAART JOHAN ALBERT ARNO ,  MEESSEN JOZEF HUBERT

IPC: C07C273/04

公开(公告)号：PL1819666T3

公开(公告)日：2016-07-29

申请号：PL05807233

申请日：2005-11-11

Applicant: STAMICARBON ,  THYSSENKRUPP IND SOLUTIONS AG

Inventor： MEESSEN JOZEF HUBERT ,  ERBEN AXEL ,  KRIJGSMAN JOHN ,  LIEBIG WINFRIED

IPC: C07C273/14 ,  B01D3/00 ,  B01D61/44

公开(公告)号：CA2724566C

公开(公告)日：2016-07-05

申请号：CA2724566

申请日：2009-05-19

Applicant: STAMICARBON

Inventor： GEVERS LAMBERTUS WILHELMUS ,  MEESSEN JOZEF HUBERT ,  MENNEN JOHANNES HENRICUS

IPC: C07C273/04

Abstract: Process for the production of urea from ammonia and carbon dioxide in a urea plant containing a high-pressure synthesis section comprising two reactor sections, a stripper and a condenser, and a recovery section, wherein in the first reactor section a first synthesis solution is formed that is fed to the second reactor section; fresh carbon dioxide is fed to the second reactor section and in the second reactor section a second synthesis solution is formed that is fed to the stripper, wherein the second synthesis solution is stripped with the use of carbon dioxide as stripping gas and the mixed gas stream obtained in the stripper is sent to the condenser together with fresh ammonia and a carbamate stream, whereafter the condensate that is formed in the condenser is fed to the first reactor section and the urea stream that is obtained in the stripper is further purified in the recovery section, wherein the flow of the first synthesis solution from the first reactor section to the second reactor section, the flow of the second synthesis solution from the second reactor section to the stripper, the flow of the mixed gas stream from the stripper to the condenser and of the condensate from the condenser to the first reactor section is a gravity flow.

公开(公告)号：CA2762166C

公开(公告)日：2016-03-22

申请号：CA2762166

申请日：2010-05-11

Applicant: STAMICARBON

Inventor： MEESSEN JOZEF HUBERT ,  ROOS WILLEM FREDERIK ,  KURSTEN JOHANNES LAMBERTUS

IPC: B01J2/16 ,  C05C9/00

Abstract: The present invention relates to a process for the production of granules from a liquid composition with a de-creased dust production, said process comprising the steps of : applying the liquid composition onto solid particles that are kept in a continuous movement by a gas stream in a granulation zone of an oblong granulator, thereby depositing and solidifying said liq-uid composition around said solid particles to increase the size of the particles and thereby form grown solid particles; discharging a stream of said grown solid particles from the granulation zone, dividing, in a size-sorting apparatus, said stream of said grown solid particles into individual streams based on the size of said grown solid particles to thereby produce streams of undersized, oversized, and desired-sized grown solid particles; transferring said stream of said oversized grown solid particles to a size-reduc-ing apparatus; crushing said stream of said oversized grown solid particles in said size-reducing apparatus, thereby reducing the particle size of said oversized grown solid particles and thereby producing a stream of crushed solid particles wherein that said stream of crushed solid particles is introduced in the granulator at a place below the place where the gas stream leaves the granula-tor.

公开(公告)号：EA020709B1

公开(公告)日：2015-01-30

申请号：EA201001805

申请日：2009-05-19

Applicant: STAMICARBON

Inventor： GEVERS LAMBERTUS WILHELMUS ,  MEESSEN JOZEF HUBERT ,  MENNEN JOHANNES HENRICUS

IPC: C07C273/00 ,  C07C273/04

Abstract: Способполучениямочевиныизаммиакаи диоксидауглеродав установкепопроизводствумочевины, включающейсекциюсинтезавысокогодавления, включающуюпоменьшеймереоднуреакторнуюсекцию, десорбери конденсатор, гдевсеоборудованиевысокогодавленияразмещаютв низкомположении, причемвысотасекциивысокогодавлениясоставляетменьшечем 35 мотуровняземнойповерхности, ипоменьшеймереоднаизреакторныхсекцийвключаетсредствараздельногораспределенияаммиакав нижнейчастиреакторнойсекции.