NO995886L - Fremgangsmåte ved fremstilling av melamin - Google Patents

Fremgangsmåte ved fremstilling av melamin

Info

Publication number
NO995886L
NO995886L NO995886A NO995886A NO995886L NO 995886 L NO995886 L NO 995886L NO 995886 A NO995886 A NO 995886A NO 995886 A NO995886 A NO 995886A NO 995886 L NO995886 L NO 995886L
Authority
NO
Norway
Prior art keywords
melamine
cooled
powder
melt
reactor
Prior art date
Application number
NO995886A
Other languages
English (en)
Other versions
NO995886D0 (no
Inventor
Tjay Tjien Tjioe
Hubertus Josef Maria Slangen
Original Assignee
Dsm Nv
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
Priority claimed from NL1006192A external-priority patent/NL1006192C2/nl
Application filed by Dsm Nv filed Critical Dsm Nv
Publication of NO995886D0 publication Critical patent/NO995886D0/no
Publication of NO995886L publication Critical patent/NO995886L/no

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
    • C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
    • C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
    • C07D251/40—Nitrogen atoms
    • C07D251/54—Three nitrogen atoms
    • C07D251/56—Preparation of melamine
    • C07D251/60—Preparation of melamine from urea or from carbon dioxide and ammonia
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D251/00—Heterocyclic compounds containing 1,3,5-triazine rings
    • C07D251/02—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings
    • C07D251/12—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members
    • C07D251/26—Heterocyclic compounds containing 1,3,5-triazine rings not condensed with other rings having three double bonds between ring members or between ring members and non-ring members with only hetero atoms directly attached to ring carbon atoms
    • C07D251/40—Nitrogen atoms
    • C07D251/54—Three nitrogen atoms
    • C07D251/56—Preparation of melamine

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Fertilizers (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Metode for fremstilling av melamin fra urea via en høy- trykksprosess i hvilken fast melamin blir oppnådd ved å overføre melaminsmelten som kommer fra reaktoren, til et kar hvor melaminsmelten nedkjøles med et kjølemiddel som fordamper. Melaminsmelten kommer fra reaktoren ved en temperatur mellom smeltepunktet for melamin og 450 °C og blir sprutet inn i et kjølekar, via sprayanordninger, som har en ammoniakkatmosfære med et økt ammoniakktrykk og nedkjølt ved hjelp av et fordampende kjølemiddel til å gi et melaminpulver. Melaminsmelten blir derved omdannet til melaminpulver med en temperatur på 270 °C eller lavere etter hvilket ammoniakktrykket blir frigjort og melamin- pulveret blir nedkjølt i det minste i en del av kjøle- området, av pulveret som blir satt mekanisk i bevegelse og blir nedkjølt direkte eller indirekte og, hvis nødvendig blir melaminpulveret ytterligere nedkjølt.
NO995886A 1997-06-02 1999-12-01 Fremgangsmåte ved fremstilling av melamin NO995886L (no)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1006192A NL1006192C2 (nl) 1997-06-02 1997-06-02 Werkwijze voor het bereiden van melamine.
EP97201804 1997-06-16
PCT/NL1998/000281 WO1998055466A1 (en) 1997-06-02 1998-05-15 Method for preparing melamine

Publications (2)

Publication Number Publication Date
NO995886D0 NO995886D0 (no) 1999-12-01
NO995886L true NO995886L (no) 2000-01-26

Family

ID=26146601

Family Applications (1)

Application Number Title Priority Date Filing Date
NO995886A NO995886L (no) 1997-06-02 1999-12-01 Fremgangsmåte ved fremstilling av melamin

Country Status (10)

Country Link
EP (1) EP0986547A1 (no)
JP (1) JP2002502416A (no)
KR (1) KR20010013245A (no)
CN (1) CN1265100A (no)
AU (1) AU728823B2 (no)
CA (1) CA2292597A1 (no)
ID (1) ID24348A (no)
NO (1) NO995886L (no)
TW (1) TW393450B (no)
WO (1) WO1998055466A1 (no)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6380385B1 (en) 1995-12-07 2002-04-30 Agrolinz Melanin Gmbh Process for the preparation of pure melamine
AU728549B2 (en) * 1997-05-21 2001-01-11 Dsm Ip Assets B.V. Method for preparing melamine
TWI221472B (en) * 1997-10-15 2004-10-01 Dsm Ip Assets Bv Process for the preparation of melamine
EP1035117A1 (en) * 1999-03-08 2000-09-13 Dsm N.V. Method for preparing melamine from urea
PL353098A1 (en) * 1999-07-27 2003-10-20 Agrolinz Melamin Gmbh Method for producing solid melamine

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4565867A (en) * 1984-01-05 1986-01-21 Melamine Chemicals, Inc. Anhydrous high-pressure melamine synthesis
AT402295B (de) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh Verfahren zur reinigung von melamin
AT402294B (de) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh Verfahren zur herstellung von hochreinem melamin
AT402296B (de) * 1995-02-03 1997-03-25 Agrolinz Melamin Gmbh Verfahren zur reinigung von melamin
US5514796A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Melamine of improved purity produced by high-pressure, non-catalytic process
US5514797A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Method for increasing purity of melamine
AT403579B (de) * 1995-12-07 1998-03-25 Agrolinz Melamin Gmbh Verfahren zur herstellung von hochreinem melamin
NL1003105C2 (nl) * 1996-05-14 1997-11-18 Dsm Nv Werkwijze voor de bereiding van melamine.
NL1003328C2 (nl) * 1996-06-13 1997-12-17 Dsm Nv Werkwijze voor het bereiden van melamine.
JP2002500664A (ja) * 1997-05-28 2002-01-08 ディーエスエム エヌ．ブイ． メラミンの製造法

Also Published As

Publication number Publication date
AU7555698A (en) 1998-12-21
EP0986547A1 (en) 2000-03-22
CN1265100A (zh) 2000-08-30
TW393450B (en) 2000-06-11
CA2292597A1 (en) 1998-12-10
JP2002502416A (ja) 2002-01-22
ID24348A (id) 2000-07-13
KR20010013245A (ko) 2001-02-26
AU728823B2 (en) 2001-01-18
WO1998055466A1 (en) 1998-12-10
NO995886D0 (no) 1999-12-01

Similar Documents

Publication Publication Date Title
RU2009115414A (ru) Способ и установка для закалки формованных листов стекла
EA200100537A1 (ru) Способ получения чистого меламина
EP1376033A3 (en) Preserving system
US5514797A (en) Method for increasing purity of melamine
NO990337D0 (no) FremgangsmÕte ved fremstilling av melamin
NO985744L (no) FremgangsmÕte ved fremstilling av melamin
NO995816D0 (no) FremgangsmÕte ved fremstilling av melamin
KR20190129277A (ko) 용융슬래그 현열회수장치
US2471559A (en) Installation for the granulation of slag
AR030115A1 (es) Procedimiento para la elaboracion de melamina
CA2513372C (en) Process for separating nh3, and optionally also co2 and h2o, from a mixture containing nh3, co2 and h2o
DE69823380D1 (de) Verfahren zur herstellung von melamin
CA2428852C (en) Process for the preparation of urea
GB795500A (en) Method of recovering energy in heat exchangers which is freed during the cooling of gases compressed in one or more stages, said heat exchangers being arranged subsequent to the compression stages
EA200100952A1 (ru) Способ получения меламина
JPS5926926A (ja) 熱炭酸カリ脱ｃｏ２装置
ID28942A (id) Metode untuk memurnikan melamin
MY150095A (en) Process and plant for the safe condensation of pure so? from starting gases containing sulfur trioxide
SU116515A1 (ru) Способ получени мочевины
ES2068354T3 (es) Procedimiento de fabricacion de piezas de altas caracteristicas mecanicas a partir de acero no tratado.
GB787554A (en) Process for the conversion of polyethylene terephthalate into dimethyl terephthalate
GB773462A (en) Improvements in or relating to the manufacture of melamine
NO822688L (no) Fremgangsmaate for transport, kjoeling og kompresjon av nitrogenoksydholdige gasser
JPS60206985A (ja) 蒸気圧縮機
NO995694L (no) Fremgangsmåte ved fremstilling av melamin

Legal Events

Date Code Title Description
FC2A Withdrawal, rejection or dismissal of laid open patent application