WO2007119156A8 - Improved process for the production of melamine with an increased yield - Google Patents

Improved process for the production of melamine with an increased yield

Info

Publication number
WO2007119156A8
WO2007119156A8 PCT/IB2007/000979 IB2007000979W WO2007119156A8 WO 2007119156 A8 WO2007119156 A8 WO 2007119156A8 IB 2007000979 W IB2007000979 W IB 2007000979W WO 2007119156 A8 WO2007119156 A8 WO 2007119156A8
Authority
WO
WIPO (PCT)
Prior art keywords
melamine
oat
production
mother liquor
improved process
Prior art date
Application number
PCT/IB2007/000979
Other languages
French (fr)
Other versions
WO2007119156A3 (en
WO2007119156A2 (en
Inventor
Sergio Noe
Roberto Santucci
Original Assignee
Eurotecnica Melamine Luxemburg
Sergio Noe
Roberto Santucci
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 Eurotecnica Melamine Luxemburg, Sergio Noe, Roberto Santucci filed Critical Eurotecnica Melamine Luxemburg
Publication of WO2007119156A2 publication Critical patent/WO2007119156A2/en
Publication of WO2007119156A3 publication Critical patent/WO2007119156A3/en
Publication of WO2007119156A8 publication Critical patent/WO2007119156A8/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

A process is described for recovering from the crystallization mother liquor of melamine both the residual saturation melamine and oxyaminotriazines (OAT), comprising an ultrafiltration of the flushing mother liquor for separating the OAT in the colloidal state from the mother liquor containing them, said ultrafiltration producing a permeate and a retentate in aqueous solution, the permeate impoverished in OAT being recycled to the preparation step of the aqueous solution of raw melamine, said process being characterized in that the retentate is recycled to the synthesis reactor.
PCT/IB2007/000979 2006-04-14 2007-04-03 Improved process for the production of melamine with an increased yield WO2007119156A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2006A000759 2006-04-14
ITMI20060759 ITMI20060759A1 (en) 2006-04-14 2006-04-14 IMPROVED PROCESS FOR THE PRODUCTION OF MELAMINE WITH INCREASE OF YIELD

Publications (3)

Publication Number Publication Date
WO2007119156A2 WO2007119156A2 (en) 2007-10-25
WO2007119156A3 WO2007119156A3 (en) 2007-12-21
WO2007119156A8 true WO2007119156A8 (en) 2008-04-03

Family

ID=37334154

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2007/000979 WO2007119156A2 (en) 2006-04-14 2007-04-03 Improved process for the production of melamine with an increased yield

Country Status (4)

Country Link
AR (1) AR060444A1 (en)
IT (1) ITMI20060759A1 (en)
TW (1) TW200745064A (en)
WO (1) WO2007119156A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20071363A1 (en) * 2007-07-09 2009-01-10 Eurotecnica Melamine Luxembour IMPROVED PROCESS FOR RETENTED TREATMENT IN A MELAMINE PRODUCTION PLANT
EP2308856A1 (en) * 2009-10-09 2011-04-13 Borealis Agrolinz Melamine GmbH Water recycling in a melamine production process
ITUB20152258A1 (en) * 2015-07-17 2017-01-17 Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen Process for the production of melamine with separation and recovery of high purity CO2 and NH3

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1315265B1 (en) * 1999-12-22 2003-02-03 Eurotecnica Dev And Licensing PROCESS FOR THE PRODUCTION WITH OTHER HIGH-PURITY MELAMINE YIELDS
ITMI20011216A1 (en) * 2001-06-08 2002-12-08 Eurotecnica Dev And Licensing IMPROVED PROCEDURE FOR THE PRODUCTION WITH HIGH MELANINE YIELDS

Also Published As

Publication number Publication date
ITMI20060759A1 (en) 2007-10-15
TW200745064A (en) 2007-12-16
AR060444A1 (en) 2008-06-18
WO2007119156A3 (en) 2007-12-21
WO2007119156A2 (en) 2007-10-25

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