MY112761A - Process for the preparation of pure melamine - Google Patents

Process for the preparation of pure melamine

Info

Publication number
MY112761A
MY112761A MYPI96005088A MYPI19965088A MY112761A MY 112761 A MY112761 A MY 112761A MY PI96005088 A MYPI96005088 A MY PI96005088A MY PI19965088 A MYPI19965088 A MY PI19965088A MY 112761 A MY112761 A MY 112761A
Authority
MY
Malaysia
Prior art keywords
melamine
partial pressure
preparation
pure
ammonia
Prior art date
Application number
MYPI96005088A
Inventor
Martin Mullner Dr
Ing Lorenzo Canzi Dr
-Ing Gerard Coufal Dipi
Original Assignee
Agrolinz Melamin Gmbh
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 Agrolinz Melamin Gmbh filed Critical Agrolinz Melamin Gmbh
Publication of MY112761A publication Critical patent/MY112761A/en

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)
  • Processes Of Treating Macromolecular Substances (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

A PROCESS FOR THE PREPARATION OF PURE MELAMINE, IN WHICH LIQUID, AMMONIA-CONTAINING MELAMINE IS RAPIDLY DEPRESSURIZED FROM AN AMMONIA PARTIAL PRESSURE PL BETWEEN 400 AND 50 X 105 PA (400 AND 50 BAR) TO AN AMMONIA PARTIAL PRESSURE P2 BETWEEN 200 X 105 PA (200 BAR) AND ATMOSPHERIC PRESSURE, WHERE PL IS ALWAYS GREATER THAN P2 AT A TEMPERATURE WHICH IS A TO 60?C HIGHER THAN THE MELAMINE SOLIDIFICATION POINT DEPENDENT ON THE PARTICULAR PREVAILING AMMONIA PARTIAL PRESSURE, HIGHER PRESSURES PERMITTING A GREATER TEMPERATURE INTERVAL FROM THE MELAMINE SOLIDIFICATION POINT THAN LOWER PRESSURES, BY WHICH MEANS PURE MELAMINE SEPARATES OUT IN SOLID FORM, WHEREUPON, IN ANY SEQUENCE, THE PRODUCT IS FURTHER DEPRESSURIZED IF APPROPRIATE TO ATMOSPHERIC PRESSURE, COOLED TO ROOM TEMPERATURE AND THE PURE MELAMINE IS ISOLATED.
MYPI96005088A 1995-12-07 1996-12-04 Process for the preparation of pure melamine MY112761A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT0199495A AT403579B (en) 1995-12-07 1995-12-07 METHOD FOR PRODUCING HIGH PURITY MELAMINE

Publications (1)

Publication Number Publication Date
MY112761A true MY112761A (en) 2001-08-30

Family

ID=3525542

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI96005088A MY112761A (en) 1995-12-07 1996-12-04 Process for the preparation of pure melamine

Country Status (29)

Country Link
EP (1) EP0874832B1 (en)
JP (1) JP2000501404A (en)
KR (1) KR100462920B1 (en)
CN (1) CN1067995C (en)
AR (1) AR004873A1 (en)
AT (2) AT403579B (en)
AU (1) AU709030B2 (en)
BG (1) BG102504A (en)
BR (1) BR9611892A (en)
CA (1) CA2239542A1 (en)
CO (1) CO4770995A1 (en)
DE (1) DE59609075D1 (en)
DZ (1) DZ2135A1 (en)
EA (1) EA000931B1 (en)
EG (1) EG20917A (en)
HR (1) HRP960575A2 (en)
HU (1) HUP9904406A3 (en)
IL (1) IL124630A0 (en)
MX (1) MX9804435A (en)
MY (1) MY112761A (en)
NO (1) NO309982B1 (en)
NZ (1) NZ324297A (en)
PL (1) PL189811B1 (en)
SK (1) SK74998A3 (en)
TR (1) TR199801029T2 (en)
TW (1) TW341567B (en)
UA (1) UA46072C2 (en)
WO (1) WO1997020826A1 (en)
ZA (1) ZA9610295B (en)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0983250B1 (en) 1997-05-21 2003-04-16 Dsm N.V. Method for preparing melamine
NL1006095C2 (en) * 1997-05-21 1998-11-25 Dsm Nv Preparation of melamine from urea via a high pressure process
NL1006147C2 (en) * 1997-05-28 1998-12-01 Dsm Nv Pure melamine is formed from urea by spray cooling the melamine melt
CA2291736A1 (en) * 1997-05-28 1998-12-03 Dsm N.V. Method for preparing melamine
NL1006191C2 (en) * 1997-06-02 1998-12-03 Dsm Nv Multi-crystalline melamine powder is prepared from urea
NL1006192C2 (en) 1997-06-02 1998-12-03 Dsm Nv Melamine is prepared from urea in a high pressure process
PL190496B1 (en) * 1997-06-02 2005-12-30 Dsm Nv Crystalline melamine resin
WO1998055466A1 (en) * 1997-06-02 1998-12-10 Dsm N.V. Method for preparing melamine
NL1008571C2 (en) * 1998-03-12 1999-07-28 Dsm Nv Crystalline melamine.
CZ20011625A3 (en) * 1998-11-13 2001-08-15 Agrolinz Melamin Gmbh Process for preparing pure melamine
BR9916562A (en) 1998-12-23 2001-10-09 Agrolinz Melamin Gmbh Melamine purification process
EP1035117A1 (en) * 1999-03-08 2000-09-13 Dsm N.V. Method for preparing melamine from urea
CA2361941A1 (en) * 1999-03-15 2000-09-21 Agrolinz Melamin Gmbh Method for producing solid melamine
EP1198460B1 (en) * 1999-07-27 2005-03-23 AMI Agrolinz Melamine International GmbH Method for producing solid melamine
NL1013217C2 (en) * 1999-10-05 2001-04-06 Dsm Nv Process for the preparation of melamine.
EP1138676A1 (en) * 2000-03-27 2001-10-04 Casale Chemicals SA Process for producing melamine at high pureness
AT410210B (en) 2000-08-07 2003-03-25 Agrolinz Melamin Gmbh METHOD FOR PRODUCING MELAMINE
AT500297B8 (en) * 2000-11-08 2007-02-15 Agrolinz Melamin Gmbh PROCESS FOR CLEANING MELAMINE AMMONIA
AT410793B (en) * 2000-12-27 2003-07-25 Agrolinz Melamin Gmbh METHOD FOR PRODUCING MELAMINE
PL209035B1 (en) 2001-11-16 2011-07-29 Ami Agrolinz Melamine Int Gmbh Method for producing melem-free melamine and quenching agents
AT411462B (en) * 2001-12-12 2004-01-26 Agrolinz Melamin Gmbh METHOD FOR CLEANING A MELAMINE MELT
FR2843964B1 (en) * 2002-08-29 2004-10-01 Sanofi Synthelabo DIOXANE-2-ALKYLCARBAMATES DERIVATIVES, THEIR PREPARATION AND THEIR THERAPEUTIC APPLICATION
RU2417992C2 (en) * 2009-07-20 2011-05-10 Открытое акционерное общество "Научно-исследовательский и проектный институт карбамида и продуктов органического синтеза" (ОАО "НИИК") Method of producing melamine and method of removing dissolved gases from aqueous solution of crude melamine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3116294A (en) * 1963-12-31 Process- for preparing high-purity melamine from urea
US3637686A (en) * 1969-02-10 1972-01-25 Nissan Chemical Ind Ltd Process for recovering purified melamine
DE3546893C3 (en) * 1984-01-05 1998-01-29 Melamine Chemicals Inc Anhydrous high-pressure melamine synthesis
US4565867A (en) * 1984-01-05 1986-01-21 Melamine Chemicals, Inc. Anhydrous high-pressure melamine synthesis
DE3500188C2 (en) * 1984-01-05 1994-08-18 Melamine Chemicals Inc Anhydrous high-pressure melamine synthesis
AT402294B (en) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh METHOD FOR PRODUCING HIGH PURITY MELAMINE
AT402296B (en) * 1995-02-03 1997-03-25 Agrolinz Melamin Gmbh METHOD FOR PURIFYING MELAMINE
US5514797A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Method for increasing purity of melamine
US5514796A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Melamine of improved purity produced by high-pressure, non-catalytic process

Also Published As

Publication number Publication date
PL327067A1 (en) 1998-11-23
AT403579B (en) 1998-03-25
IL124630A0 (en) 1998-12-06
KR100462920B1 (en) 2005-04-08
HRP960575A2 (en) 1997-12-31
TR199801029T2 (en) 1999-05-21
TW341567B (en) 1998-10-01
JP2000501404A (en) 2000-02-08
CA2239542A1 (en) 1997-06-12
ATA199495A (en) 1997-08-15
MX9804435A (en) 1998-09-30
AU709030B2 (en) 1999-08-19
AR004873A1 (en) 1999-03-10
EP0874832A1 (en) 1998-11-04
BR9611892A (en) 1999-02-17
PL189811B1 (en) 2005-09-30
WO1997020826A1 (en) 1997-06-12
NO982251D0 (en) 1998-05-15
SK74998A3 (en) 1998-11-04
CN1203592A (en) 1998-12-30
DE59609075D1 (en) 2002-05-16
KR19990071932A (en) 1999-09-27
NO309982B1 (en) 2001-04-30
DZ2135A1 (en) 2002-07-23
BG102504A (en) 1999-04-30
ZA9610295B (en) 1997-06-17
CN1067995C (en) 2001-07-04
ATE215936T1 (en) 2002-04-15
CO4770995A1 (en) 1999-04-30
NZ324297A (en) 1999-07-29
EA000931B1 (en) 2000-06-26
NO982251L (en) 1998-05-15
AU1175597A (en) 1997-06-27
EG20917A (en) 2000-06-28
HUP9904406A2 (en) 2000-05-28
EP0874832B1 (en) 2002-04-10
UA46072C2 (en) 2002-05-15
EA199800532A1 (en) 1998-12-24
HUP9904406A3 (en) 2000-07-28

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