NL1018936C2 - Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt. - Google Patents

Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt. Download PDF

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Publication number
NL1018936C2
NL1018936C2 NL1018936A NL1018936A NL1018936C2 NL 1018936 C2 NL1018936 C2 NL 1018936C2 NL 1018936 A NL1018936 A NL 1018936A NL 1018936 A NL1018936 A NL 1018936A NL 1018936 C2 NL1018936 C2 NL 1018936C2
Authority
NL
Netherlands
Prior art keywords
melamine
pressure
ammonia
mpa
melt
Prior art date
Application number
NL1018936A
Other languages
English (en)
Dutch (nl)
Inventor
Tjien Tjay Tjioe
Johannes Bernardus Ja Claassen
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
Application filed by Dsm Nv filed Critical Dsm Nv
Priority to NL1018936A priority Critical patent/NL1018936C2/nl
Priority to PCT/EP2002/010015 priority patent/WO2003022823A1/en
Priority to EA200400425A priority patent/EA005552B1/ru
Priority to CN 02817635 priority patent/CN1260217C/zh
Priority to PL02368640A priority patent/PL368640A1/xx
Priority to EP02797960A priority patent/EP1425271A1/en
Application granted granted Critical
Publication of NL1018936C2 publication Critical patent/NL1018936C2/nl

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
    • C07D251/62—Purification of melamine
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
NL1018936A 2001-09-12 2001-09-12 Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt. NL1018936C2 (nl)

Priority Applications (6)

Application Number Priority Date Filing Date Title
NL1018936A NL1018936C2 (nl) 2001-09-12 2001-09-12 Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt.
PCT/EP2002/010015 WO2003022823A1 (en) 2001-09-12 2002-09-06 Process for obtaining crystalline melamine from melamine melt
EA200400425A EA005552B1 (ru) 2001-09-12 2002-09-06 Способ для получения кристаллического меламина из расплава меламина
CN 02817635 CN1260217C (zh) 2001-09-12 2002-09-06 从三聚氰胺熔融物获得晶体三聚氰胺的方法
PL02368640A PL368640A1 (en) 2001-09-12 2002-09-06 Process for obtaining crystalline melamine from melamine melt
EP02797960A EP1425271A1 (en) 2001-09-12 2002-09-06 Process for obtaining crystalline melamine from melamine melt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1018936A NL1018936C2 (nl) 2001-09-12 2001-09-12 Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt.
NL1018936 2001-09-12

Publications (1)

Publication Number Publication Date
NL1018936C2 true NL1018936C2 (nl) 2003-03-13

Family

ID=19773994

Family Applications (1)

Application Number Title Priority Date Filing Date
NL1018936A NL1018936C2 (nl) 2001-09-12 2001-09-12 Werkwijze voor het verkrijgen van kristallijn melamine uit een melaminesmelt.

Country Status (6)

Country Link
EP (1) EP1425271A1 (zh)
CN (1) CN1260217C (zh)
EA (1) EA005552B1 (zh)
NL (1) NL1018936C2 (zh)
PL (1) PL368640A1 (zh)
WO (1) WO2003022823A1 (zh)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005021802A1 (de) * 2005-05-04 2006-11-09 Ami-Agrolinz Melamine International Gmbh Verfahren und Vorrichtung zur Kristallisation von Melamin
IT201800005382A1 (it) * 2018-05-15 2019-11-15 Procedimento e dispositivo per separare cristalli di melammina in un processo di produzione di melammina da urea

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637686A (en) * 1969-02-10 1972-01-25 Nissan Chemical Ind Ltd Process for recovering purified melamine
JPH08333351A (ja) * 1995-06-09 1996-12-17 Mitsui Toatsu Chem Inc メラミンの精製方法
WO1998054160A1 (en) * 1997-05-28 1998-12-03 Dsm N.V. Method for preparing melamine
WO2000029393A1 (de) * 1998-11-13 2000-05-25 Agrolinz Melamin Gmbh Verfahren zur herstellung von reinem melamin

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3637686A (en) * 1969-02-10 1972-01-25 Nissan Chemical Ind Ltd Process for recovering purified melamine
JPH08333351A (ja) * 1995-06-09 1996-12-17 Mitsui Toatsu Chem Inc メラミンの精製方法
WO1998054160A1 (en) * 1997-05-28 1998-12-03 Dsm N.V. Method for preparing melamine
WO2000029393A1 (de) * 1998-11-13 2000-05-25 Agrolinz Melamin Gmbh Verfahren zur herstellung von reinem melamin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 199709, Derwent World Patents Index; Class A41, AN 1997-095463, XP002198905 *

Also Published As

Publication number Publication date
PL368640A1 (en) 2005-04-04
EA200400425A1 (ru) 2004-08-26
CN1553902A (zh) 2004-12-08
WO2003022823A1 (en) 2003-03-20
CN1260217C (zh) 2006-06-21
EP1425271A1 (en) 2004-06-09
EA005552B1 (ru) 2005-04-28

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Legal Events

Date Code Title Description
PD2B A search report has been drawn up
SD Assignments of patents

Owner name: DSM IP ASSETS B.V.

Effective date: 20050915

TD Modifications of names of proprietors of patents

Owner name: KONINKLIJKE DSM N.V.

Effective date: 20050915

VD1 Lapsed due to non-payment of the annual fee

Effective date: 20080401