BR9810348A - Processo de alta-pressão para a produção de melamina a partir de uréia - Google Patents

Processo de alta-pressão para a produção de melamina a partir de uréia

Info

Publication number
BR9810348A
BR9810348A BR9810348-2A BR9810348A BR9810348A BR 9810348 A BR9810348 A BR 9810348A BR 9810348 A BR9810348 A BR 9810348A BR 9810348 A BR9810348 A BR 9810348A
Authority
BR
Brazil
Prior art keywords
melamine
urea
reactor
kpa
production
Prior art date
Application number
BR9810348-2A
Other languages
English (en)
Inventor
Sergio Noe
Original Assignee
Eurotecnica Dev & Licensing S
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 Dev & Licensing S filed Critical Eurotecnica Dev & Licensing S
Publication of BR9810348A publication Critical patent/BR9810348A/pt

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)
  • Phenolic Resins Or Amino Resins (AREA)

Abstract

<B>"PROCESSO DE ALTA-PRESSãO PARA A PRODUçãO DE MELAMINA A PARTIR DE URéIA"<D>. O presente invento diz respeito a um processo de alta-pressão para a produção de melamina a partir de uréia, com altos rendimentos e taxas de conversão, compreendendo as seguintes etapas: a) alimentar uréia a um reator contendo essencialmente melamina fundida, o qual reator opera de forma contínua e é mantido a uma temperatura na faixa de 360 a 420°C sob uma pressão maior que 7 x 10³ kPa e preferencialmente de 8 x 10³ a 9 x 10³ kPa, enquanto uma agitação vigorosa é provida pelos gases desenvolvidos; b) recuperar o produto líquido de reação, contendo 85 a 95%, preferencialmente de 88a 93% de melamina e remover uma fase gasosa contendo essencialmente CO~ 2~ e NH~ 3~; c) alimentar continuamente a fase líquida recuperada em b), juntamente com NH~ 3~ fresco, a um reator tubular, no qual essencialmente todo o volume esteja ocupado pela fase líquida sem qualquer mistura do produto de reação com os reagentes e nem com os produtos intermediários, o qual reator é mantido a uma temperatura de entre 360 e 450°C e sob uma pressão maior que 7 x 10³ kPa por um tempo de residência suficiente para completar a reação; d) coletar melamina com um alto nível de pureza a partir da saída do reator tubular.
BR9810348-2A 1997-06-27 1998-06-16 Processo de alta-pressão para a produção de melamina a partir de uréia BR9810348A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT97MI001524A IT1292427B1 (it) 1997-06-27 1997-06-27 Procedimento e apparecchiatura per la produzione di melammina
PCT/IT1998/000161 WO1999000374A1 (en) 1997-06-27 1998-06-16 Process and apparatus for melamine manufacture

Publications (1)

Publication Number Publication Date
BR9810348A true BR9810348A (pt) 2000-08-29

Family

ID=11377451

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9810348-2A BR9810348A (pt) 1997-06-27 1998-06-16 Processo de alta-pressão para a produção de melamina a partir de uréia

Country Status (18)

Country Link
US (1) US6252074B1 (pt)
EP (1) EP0991629B1 (pt)
KR (1) KR100529856B1 (pt)
CN (1) CN1130354C (pt)
AR (1) AR010422A1 (pt)
AU (1) AU7930898A (pt)
BR (1) BR9810348A (pt)
CA (1) CA2293801C (pt)
DE (1) DE69823824T2 (pt)
EA (1) EA002194B1 (pt)
ES (1) ES2224409T3 (pt)
ID (1) ID26902A (pt)
IT (1) IT1292427B1 (pt)
MY (1) MY122135A (pt)
PL (1) PL189706B1 (pt)
SA (1) SA98190278B1 (pt)
TW (1) TW531535B (pt)
WO (1) WO1999000374A1 (pt)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1010316C2 (nl) 1998-10-14 1999-09-23 Dsm Nv Werkwijze voor de bereiding van melamine.
EP1138676A1 (en) * 2000-03-27 2001-10-04 Casale Chemicals SA Process for producing melamine at high pureness
FI109021B (fi) * 2000-06-30 2002-05-15 Kemira Agro Oy Reaktori ja menetelmä melamiinin tuottamiseksi
AT409489B (de) * 2000-10-20 2002-08-26 Agrolinz Melamin Gmbh Verfahren zur herstellung von melamin
NL1022414C2 (nl) * 2003-01-17 2004-07-20 Dsm Nv Werkwijze voor het onttrekken van energie uit rookgassen.
WO2004085413A1 (fr) * 2003-03-24 2004-10-07 Guorui Zhang Procede de production de melamine par processus haute pression
DE10326827A1 (de) 2003-06-12 2004-12-30 Ami-Agrolinz Melamine International Gmbh Verfahren und Vorrichtung zur Herstellung von Melamin im einphasigen Rohrreaktor
AT414239B (de) 2004-07-29 2006-10-15 Ami Agrolinz Melamine Int Gmbh Hochdruckverfahren zur herstellung von reinem melamin
IT1391372B1 (it) * 2008-10-07 2011-12-13 Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen Procedimento e apparecchiatura per la produzione di melammina da urea
ITMI20082294A1 (it) * 2008-12-22 2010-06-23 Eurotecnica Melamine Luxemburg Zwe Igniederlassun Procedimento migliorato per la produzione di melammina ad elevata purezza mediante pirolisi dell'urea
IT1400090B1 (it) * 2010-05-06 2013-05-17 Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen Procedimento a basso consumo energetico per la produzione di melammina ad elevata purezza tramite pirolisi dell'urea, e relativa apparecchiatura
EP2399669A1 (en) 2010-06-24 2011-12-28 Borealis Agrolinz Melamine GmbH Horizontal high-pressure melamine reactor
IT1403101B1 (it) * 2010-12-15 2013-10-04 Eurotecnica Melamine Luxemburg Zweigniederlassung In Ittigen Uso di urea contenente formaldeide in un procedimento per la produzione di melammina mediante pirolisi dell'urea e relativo procedimento per la produzione di melammina
RU2675952C2 (ru) * 2014-01-10 2018-12-25 Эуротекника Меламине, Люксембург, Цвайгнидерлассунг ин Иттиген Трубчатый теплообменник и установка, в частности реактор для производства меламина, содержащая такой теплообменник
EP2918333A1 (en) * 2014-03-12 2015-09-16 Casale Sa High pressure reactor for the synthesis of melamine
CN104258795B (zh) * 2014-09-24 2015-12-30 中国纺织科学研究院 交换反应系统、包含其的改性聚酯生产系统及改性聚酯生产方法
IT202100013088A1 (it) * 2021-05-20 2022-11-20 Eurotecnica Melamine Ag Apparato di trattamento delle correnti gassose uscenti dalla sezione di reazione in un impianto per la produzione di melammina e relativo procedimento

Family Cites Families (4)

* 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
US3143394A (en) * 1956-04-25 1964-08-04 American Cyanamid Co Tube reactor for manufacture of melamine
AT402294B (de) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh Verfahren zur herstellung von hochreinem melamin
US5514797A (en) * 1995-06-07 1996-05-07 Melamine Chemicals, Inc. Method for increasing purity of melamine

Also Published As

Publication number Publication date
EA200000072A1 (ru) 2000-06-26
EA002194B1 (ru) 2002-02-28
PL337652A1 (en) 2000-08-28
CN1261355A (zh) 2000-07-26
ITMI971524A0 (pt) 1997-06-27
DE69823824D1 (de) 2004-06-17
AR010422A1 (es) 2000-06-07
DE69823824T2 (de) 2005-05-12
SA98190278B1 (ar) 2006-09-25
IT1292427B1 (it) 1999-02-08
WO1999000374A1 (en) 1999-01-07
CA2293801C (en) 2008-04-01
KR100529856B1 (ko) 2005-11-22
AU7930898A (en) 1999-01-19
KR20010020534A (ko) 2001-03-15
ID26902A (id) 2001-02-15
ITMI971524A1 (it) 1998-12-27
MY122135A (en) 2006-03-31
CN1130354C (zh) 2003-12-10
PL189706B1 (pl) 2005-09-30
EP0991629B1 (en) 2004-05-12
US6252074B1 (en) 2001-06-26
ES2224409T3 (es) 2005-03-01
TW531535B (en) 2003-05-11
EP0991629A1 (en) 2000-04-12
CA2293801A1 (en) 1999-01-07

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Legal Events

Date Code Title Description
B25D Requested change of name of applicant approved
B25A Requested transfer of rights approved

Free format text: EUROTECNICA GROUP S.A. (SWISS BRANCH) (CH)

B25A Requested transfer of rights approved

Owner name: EUROTECNICA MELAMINE (CH)

Free format text: TRANSFERIDO DE: EUROTECNICA GROUP S.A. (SWISS BRANCH)

B25K Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: republication

Owner name: EUROTECNICA MELAMINE - LUXEMBOURG - ZWEIGNIEDERLAS

Free format text: REFERENTE A RPI 1860 DE 29/08/2006, COD. 25.1, QUANTO AO NOME DO TITULAR.

B06A Patent application procedure suspended [chapter 6.1 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements