AU2001242492A1 - Process for the production of melamine crystals at high pureness - Google Patents

Process for the production of melamine crystals at high pureness

Info

Publication number
AU2001242492A1
AU2001242492A1 AU2001242492A AU4249201A AU2001242492A1 AU 2001242492 A1 AU2001242492 A1 AU 2001242492A1 AU 2001242492 A AU2001242492 A AU 2001242492A AU 4249201 A AU4249201 A AU 4249201A AU 2001242492 A1 AU2001242492 A1 AU 2001242492A1
Authority
AU
Australia
Prior art keywords
liquid ammonia
melamine
production
melamine crystals
pureness
Prior art date
Legal status (The legal status 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 status listed.)
Abandoned
Application number
AU2001242492A
Inventor
Giorgio Pagani
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Casale SA
Original Assignee
Casale Chemicals SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=8168248&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=AU2001242492(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Casale Chemicals SA filed Critical Casale Chemicals SA
Publication of AU2001242492A1 publication Critical patent/AU2001242492A1/en
Abandoned legal-status Critical Current

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
    • C07D251/62—Purification of melamine

Landscapes

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

Abstract

A process for producing melamine at high pureness is distinguished by the fact that it comprises a crystallisation step of a flow comprising melt melamine at high purity by cooling with liquid ammonia and a thickening step of the resulting suspension of melamine crystals in liquid ammonia by separation of a portion of the liquid ammonia present in said suspension, whereby the liquid ammonia separated in said thickening step is reused as coolant in the crystallisation step. <IMAGE>
AU2001242492A 2000-03-27 2001-03-21 Process for the production of melamine crystals at high pureness Abandoned AU2001242492A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP00106580A EP1138676A1 (en) 2000-03-27 2000-03-27 Process for producing melamine at high pureness
EP00106580 2000-03-27
PCT/EP2001/003207 WO2001072722A1 (en) 2000-03-27 2001-03-21 Process for the production of melamine crystals at high pureness

Publications (1)

Publication Number Publication Date
AU2001242492A1 true AU2001242492A1 (en) 2001-10-08

Family

ID=8168248

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001242492A Abandoned AU2001242492A1 (en) 2000-03-27 2001-03-21 Process for the production of melamine crystals at high pureness

Country Status (10)

Country Link
US (1) US6825346B2 (en)
EP (2) EP1138676A1 (en)
JP (1) JP2003528865A (en)
CN (1) CN1215062C (en)
AT (1) ATE305457T1 (en)
AU (1) AU2001242492A1 (en)
CA (1) CA2404096C (en)
DE (1) DE60113665D1 (en)
RU (1) RU2289578C2 (en)
WO (1) WO2001072722A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1022764C2 (en) * 2003-02-24 2004-08-26 Dsm Nv Wet quench.
WO2007000176A1 (en) * 2005-06-28 2007-01-04 Casale Chemicals S.A. Process for gently cooling and crystallizing melamine from a melamine melt or from the gaseous phase
EP2098516A1 (en) * 2008-03-04 2009-09-09 Urea Casale S.A. Process for the production of high purity melamine from urea
EP2119710A1 (en) * 2008-05-14 2009-11-18 Urea Casale S.A. Process for producing high-quality melamine from urea
DE102009052506B4 (en) * 2009-11-11 2015-08-20 Air Liquide Global E&C Solutions Germany Gmbh Gas scrubber with integrated heat exchanger
CN104315871B (en) * 2014-10-30 2016-05-25 安徽金禾实业股份有限公司 Molten salt furnace outlet smoke heat energy recovery method in Melamine Production
IT201800005382A1 (en) * 2018-05-15 2019-11-15 Process and device for separating melamine crystals in a process of producing melamine from urea
CN115944942B (en) * 2022-12-06 2024-04-12 四川金象赛瑞化工股份有限公司 Preparation method of cyanamide substance

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5514796A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Melamine of improved purity produced by high-pressure, non-catalytic process
US6380385B1 (en) * 1995-12-07 2002-04-30 Agrolinz Melanin Gmbh Process for the preparation of pure melamine
AT403579B (en) * 1995-12-07 1998-03-25 Agrolinz Melamin Gmbh METHOD FOR PRODUCING HIGH PURITY MELAMINE
NL1003328C2 (en) * 1996-06-13 1997-12-17 Dsm Nv Process for preparing melamine.
NL1003709C2 (en) * 1996-07-30 1998-02-05 Dsm Nv Process for preparing melamine.
IT1292427B1 (en) * 1997-06-27 1999-02-08 Eurotecnica Contractors And En PROCESS AND EQUIPMENT FOR THE PRODUCTION OF MELAMINE

Also Published As

Publication number Publication date
EP1268451A1 (en) 2003-01-02
RU2289578C2 (en) 2006-12-20
US20030149265A1 (en) 2003-08-07
CN1215062C (en) 2005-08-17
ATE305457T1 (en) 2005-10-15
US6825346B2 (en) 2004-11-30
EP1268451B1 (en) 2005-09-28
RU2002127797A (en) 2004-02-27
EP1138676A1 (en) 2001-10-04
CN1419550A (en) 2003-05-21
DE60113665D1 (en) 2006-02-09
CA2404096C (en) 2010-06-15
JP2003528865A (en) 2003-09-30
WO2001072722A1 (en) 2001-10-04
CA2404096A1 (en) 2001-10-04

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