IT1261841B - PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE. - Google Patents

PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE.

Info

Publication number
IT1261841B
IT1261841B ITRM930568A ITRM930568A IT1261841B IT 1261841 B IT1261841 B IT 1261841B IT RM930568 A ITRM930568 A IT RM930568A IT RM930568 A ITRM930568 A IT RM930568A IT 1261841 B IT1261841 B IT 1261841B
Authority
IT
Italy
Prior art keywords
production
final
coming
crystals
high purity
Prior art date
Application number
ITRM930568A
Other languages
Italian (it)
Inventor
Salvatore Cassarino
Francesco Giacobbe
Original Assignee
Conser Spa
Kinetics Technology
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 Conser Spa, Kinetics Technology filed Critical Conser Spa
Publication of ITRM930568A0 publication Critical patent/ITRM930568A0/en
Priority to ITRM930568A priority Critical patent/IT1261841B/en
Priority to CN94190625A priority patent/CN1113656A/en
Priority to RU95109943/04A priority patent/RU95109943A/en
Priority to AU75081/94A priority patent/AU7508194A/en
Priority to KR1019950701538A priority patent/KR950704272A/en
Priority to PCT/IT1994/000139 priority patent/WO1995006042A1/en
Priority to EP94924991A priority patent/EP0665838A1/en
Priority to JP7507457A priority patent/JPH08502760A/en
Publication of ITRM930568A1 publication Critical patent/ITRM930568A1/en
Application granted granted Critical
Publication of IT1261841B publication Critical patent/IT1261841B/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
    • C07D251/62—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

Procedimento perfezionato per la produzione di melammina ad elevata purezza, proveniente dalla conversione di urea, in cui la purificazione avviene in due distinte fasi di cristallizzazione, primaria e finale, di cui la prima consiste nella produzione di cristalli grezzi, che vengono lavati con acque madri provenienti dalla cristallizzazione finale e sottoposte ad uno specifico trattamento di purificazione. e la seconda prevede la dissoluzione dei detti cristalli con acque madri di riciclo, provenienti dalla fase di centrifugazione finale, la loro ricristallizzazione previa filtrazione ed una centrifugazione finale con lavaggio dei cristalli con acqua demineralizzata.Improved process for the production of high purity melamine, coming from the conversion of urea, in which the purification takes place in two distinct crystallization phases, primary and final, of which the first consists in the production of raw crystals, which are washed with mother liquors coming from the final crystallization and subjected to a specific purification treatment. and the second provides for the dissolution of said crystals with recycled mother liquors, coming from the final centrifugation phase, their recrystallization after filtration and a final centrifugation with washing of the crystals with demineralized water.

ITRM930568A 1993-08-23 1993-08-23 PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE. IT1261841B (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
ITRM930568A IT1261841B (en) 1993-08-23 1993-08-23 PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE.
KR1019950701538A KR950704272A (en) 1993-08-23 1994-08-23 PROCESS FOR THE PRODUCTION OF HIGH PURITY MELAMINE
RU95109943/04A RU95109943A (en) 1993-08-23 1994-08-23 Method of preparing melamine of high purity, method of extraction and purification of melamine
AU75081/94A AU7508194A (en) 1993-08-23 1994-08-23 Process for the production of high purity melamine
CN94190625A CN1113656A (en) 1993-08-23 1994-08-23 Process for the production of high purity melamine
PCT/IT1994/000139 WO1995006042A1 (en) 1993-08-23 1994-08-23 Process for the production of high purity melamine
EP94924991A EP0665838A1 (en) 1993-08-23 1994-08-23 Process for the production of high purity melamine
JP7507457A JPH08502760A (en) 1993-08-23 1994-08-23 Method for producing high-purity melamine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITRM930568A IT1261841B (en) 1993-08-23 1993-08-23 PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE.

Publications (3)

Publication Number Publication Date
ITRM930568A0 ITRM930568A0 (en) 1993-08-23
ITRM930568A1 ITRM930568A1 (en) 1995-02-23
IT1261841B true IT1261841B (en) 1996-06-03

Family

ID=11401924

Family Applications (1)

Application Number Title Priority Date Filing Date
ITRM930568A IT1261841B (en) 1993-08-23 1993-08-23 PROCEDURE FOR THE PRODUCTION OF HIGH PURITY MELAMINE.

Country Status (8)

Country Link
EP (1) EP0665838A1 (en)
JP (1) JPH08502760A (en)
KR (1) KR950704272A (en)
CN (1) CN1113656A (en)
AU (1) AU7508194A (en)
IT (1) IT1261841B (en)
RU (1) RU95109943A (en)
WO (1) WO1995006042A1 (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5874660A (en) * 1995-10-04 1999-02-23 Exxon Production Research Company Method for inhibiting hydrate formation
US5744665A (en) * 1995-06-08 1998-04-28 Exxon Production Research Company Maleimide copolymers and method for inhibiting hydrate formation
NL1003105C2 (en) * 1996-05-14 1997-11-18 Dsm Nv Process for the preparation of melamine.
NL1008571C2 (en) * 1998-03-12 1999-07-28 Dsm Nv Crystalline melamine.
NL1008912C2 (en) 1998-04-17 1999-10-19 Dsm Nv Method of drying melamine.
IT1315255B1 (en) 1999-11-16 2003-02-03 Eurotecnica Dev And Licensing MELAMINE PURIFICATION PROCESS.
IT1315265B1 (en) * 1999-12-22 2003-02-03 Eurotecnica Dev And Licensing PROCESS FOR THE PRODUCTION WITH OTHER HIGH-PURITY MELAMINE YIELDS
DE102005021802A1 (en) * 2005-05-04 2006-11-09 Ami-Agrolinz Melamine International Gmbh Process and apparatus for the crystallization of melamine
EP2098516A1 (en) 2008-03-04 2009-09-09 Urea Casale S.A. Process for the production of high purity melamine from urea
ITMI20080861A1 (en) * 2008-05-13 2009-11-14 Eurotecnica Melamine Luxembourg IMPROVED PROCESS FOR THE PURIFICATION OF MELAMINE AND ITS EQUIPMENT
CN104788394B (en) * 2015-04-14 2017-09-01 四川金象赛瑞化工股份有限公司 A kind of melamine process for purification
CN115181070A (en) * 2022-08-10 2022-10-14 宁波中科远东催化工程技术有限公司 Method for producing melamine

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL161750C (en) * 1968-11-16 1980-03-17 Stamicarbon Process for separating melamine from a gaseous reaction mixture of melamine, ammonia and carbon dioxide.
NL8201479A (en) * 1982-04-07 1983-11-01 Stamicarbon METHOD FOR PREPARING MELAMINE.

Also Published As

Publication number Publication date
RU95109943A (en) 1997-03-20
ITRM930568A0 (en) 1993-08-23
ITRM930568A1 (en) 1995-02-23
KR950704272A (en) 1995-11-17
WO1995006042A1 (en) 1995-03-02
EP0665838A1 (en) 1995-08-09
JPH08502760A (en) 1996-03-26
AU7508194A (en) 1995-03-21
CN1113656A (en) 1995-12-20

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