NO20076352L - Fremgangsmate for oppkonsentrering av en vandig ammoniumkarbamatstrom - Google Patents

Fremgangsmate for oppkonsentrering av en vandig ammoniumkarbamatstrom

Info

Publication number
NO20076352L
NO20076352L NO20076352A NO20076352A NO20076352L NO 20076352 L NO20076352 L NO 20076352L NO 20076352 A NO20076352 A NO 20076352A NO 20076352 A NO20076352 A NO 20076352A NO 20076352 L NO20076352 L NO 20076352L
Authority
NO
Norway
Prior art keywords
ammonium carbamate
aqueous ammonium
carbamate stream
stream
mpa
Prior art date
Application number
NO20076352A
Other languages
English (en)
Other versions
NO345213B1 (no
Inventor
Tjay Tjien Tjioe
Johannes Henricus Mennen
Original Assignee
Dsm Ip Assets Bv
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dsm Ip Assets Bv filed Critical Dsm Ip Assets Bv
Publication of NO20076352L publication Critical patent/NO20076352L/no
Publication of NO345213B1 publication Critical patent/NO345213B1/no

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C273/00—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups
    • C07C273/02—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds
    • C07C273/12—Preparation of urea or its derivatives, i.e. compounds containing any of the groups, the nitrogen atoms not being part of nitro or nitroso groups of urea, its salts, complexes or addition compounds combined with the synthesis of melamine
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C51/00—Preparation of carboxylic acids or their salts, halides or anhydrides
    • C07C51/15—Preparation of carboxylic acids or their salts, halides or anhydrides by reaction of organic compounds with carbon dioxide, e.g. Kolbe-Schmitt synthesis

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Gas Separation By Absorption (AREA)

Abstract

Oppfinnelsen vedrører en fremgangsmåte for oppkonsentrering av en vandig ammoniumkarbamatstrøm, som har blitt dannet i en prosess for fremstilling av urea, har et trykk på mellom 0,20 MPa og 0,9 MPa, en temperatur på mellom 35?C og 95?C, og inneholder minst 25 vektprosent H2O, omfattende: et trykkøkningstrinn, hvor den vandige ammoniumkarbamatstrømmen økes i trykk til et trykk på mellom 1,0 MPa og 7 MPa; et konsentrasjonstrinn, hvor den vandige ammoniumkarbamatstrømmen kontakteres med en gasstrøm, som har blitt dannet i en prosess for fremstillingen av melamin og som hovedsakelig består av NH3, CO2 og eventuelt H2O, og har et lavere H2O-innehold enn den vandige ammoniumkarbamatstrømmen, gasstrømmen blir absorbert i den vandige ammoniumkarbamatstrømmen på en slik måte at en oppkonsentrert ammoniumkarbamatstrøm dannes som inneholder mellom 15 og 35 vektprosent H2O; et utslippstrinn, hvor den oppkonsentrerte ammoniumkarbamat-strømmen separeres og slippes ut.
NO20076352A 2005-05-13 2007-12-12 Fremgangsmåte for oppkonstruering av en vandig ammoniumkarbamatstrøm for fremstilling av urea NO345213B1 (no)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1029038 2005-05-13
PCT/NL2006/000249 WO2006121332A1 (en) 2005-05-13 2006-05-15 Method for concentrating an aqueous ammonium carbamate stream

Publications (2)

Publication Number Publication Date
NO20076352L true NO20076352L (no) 2008-01-22
NO345213B1 NO345213B1 (no) 2020-11-09

Family

ID=35407073

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20076352A NO345213B1 (no) 2005-05-13 2007-12-12 Fremgangsmåte for oppkonstruering av en vandig ammoniumkarbamatstrøm for fremstilling av urea

Country Status (12)

Country Link
US (1) US7893298B2 (no)
EP (1) EP1879857A1 (no)
JP (1) JP5069222B2 (no)
KR (1) KR101320276B1 (no)
CN (1) CN101175717B (no)
AU (1) AU2006244735B2 (no)
CA (1) CA2606784C (no)
EA (1) EA019704B1 (no)
EG (1) EG26377A (no)
MY (1) MY148227A (no)
NO (1) NO345213B1 (no)
WO (1) WO2006121332A1 (no)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1392300B1 (it) * 2008-12-18 2012-02-24 Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen Procedimento per riciclare a un impianto urea una corrente di off-gas prodotti in un impianto melammina
PL3083571T3 (pl) 2013-12-17 2019-08-30 Stamicarbon B.V. Zintegrowana produkcja mocznika i melaminy
GB2552040B (en) * 2016-12-01 2018-08-01 Univ Loughborough Process for reducing nitrogen oxides
WO2021005588A1 (en) * 2019-07-08 2021-01-14 A.Y. Laboratories Ltd. Process for producing a solution of ammonium carbamate

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL276149A (no) * 1961-03-29 1900-01-01
GB1148767A (en) 1965-10-25 1969-04-16 Nissan Chemical Ind Ltd Process for the production of melamine
DE2053358A1 (en) * 1970-10-30 1972-05-04 Badische Anilin & Soda Fabrik AG, 6700 Ludwigshafen Supply of waste gases for ureau synthesis - using a controlled ammonia to carbon dioxide ratio
NL1017990C2 (nl) * 2001-05-03 2002-11-05 Dsm Nv Werkwijze voor de bereiding van ureum.
WO2002090232A1 (en) 2001-05-04 2002-11-14 Lift-Tech As Elevator structure
EP1429996B1 (en) * 2001-07-24 2005-05-18 DSM IP Assets B.V. Method for obtaining an ammonium carbamate solution from a gas mixture containing ammonia, water and carbon dioxide
NL1020388C2 (nl) * 2002-04-15 2003-10-17 Dsm Nv Werkwijze voor de bereiding van ureum.
NL1021637C2 (nl) * 2002-07-29 2004-01-30 Dsm Nv Werkwijze voor het vergroten van de capaciteit van een ureumfabriek.
US20070032650A1 (en) * 2004-02-20 2007-02-08 Urea Casale S.A. Integrated process for urea and melamine production

Also Published As

Publication number Publication date
EA019704B1 (ru) 2014-05-30
MY148227A (en) 2013-03-29
KR20080007363A (ko) 2008-01-18
AU2006244735A1 (en) 2006-11-16
CN101175717A (zh) 2008-05-07
CN101175717B (zh) 2011-07-06
CA2606784A1 (en) 2006-11-16
WO2006121332A8 (en) 2007-01-25
JP2008540518A (ja) 2008-11-20
EP1879857A1 (en) 2008-01-23
AU2006244735B2 (en) 2012-02-16
JP5069222B2 (ja) 2012-11-07
CA2606784C (en) 2013-07-30
US7893298B2 (en) 2011-02-22
EA200702484A1 (ru) 2008-04-28
NO345213B1 (no) 2020-11-09
EG26377A (en) 2013-09-10
KR101320276B1 (ko) 2013-10-22
WO2006121332A1 (en) 2006-11-16
US20090069597A1 (en) 2009-03-12

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