NO995886L - Fremgangsmåte ved fremstilling av melamin - Google Patents
Fremgangsmåte ved fremstilling av melaminInfo
- Publication number
- NO995886L NO995886L NO995886A NO995886A NO995886L NO 995886 L NO995886 L NO 995886L NO 995886 A NO995886 A NO 995886A NO 995886 A NO995886 A NO 995886A NO 995886 L NO995886 L NO 995886L
- Authority
- NO
- Norway
- Prior art keywords
- melamine
- cooled
- powder
- melt
- reactor
- Prior art date
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
- C07D251/56—Preparation of melamine
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Fertilizers (AREA)
- Phenolic Resins Or Amino Resins (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Metode for fremstilling av melamin fra urea via en høy- trykksprosess i hvilken fast melamin blir oppnådd ved å overføre melaminsmelten som kommer fra reaktoren, til et kar hvor melaminsmelten nedkjøles med et kjølemiddel som fordamper. Melaminsmelten kommer fra reaktoren ved en temperatur mellom smeltepunktet for melamin og 450 °C og blir sprutet inn i et kjølekar, via sprayanordninger, som har en ammoniakkatmosfære med et økt ammoniakktrykk og nedkjølt ved hjelp av et fordampende kjølemiddel til å gi et melaminpulver. Melaminsmelten blir derved omdannet til melaminpulver med en temperatur på 270 °C eller lavere etter hvilket ammoniakktrykket blir frigjort og melamin- pulveret blir nedkjølt i det minste i en del av kjøle- området, av pulveret som blir satt mekanisk i bevegelse og blir nedkjølt direkte eller indirekte og, hvis nødvendig blir melaminpulveret ytterligere nedkjølt.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL1006192A NL1006192C2 (nl) | 1997-06-02 | 1997-06-02 | Werkwijze voor het bereiden van melamine. |
EP97201804 | 1997-06-16 | ||
PCT/NL1998/000281 WO1998055466A1 (en) | 1997-06-02 | 1998-05-15 | Method for preparing melamine |
Publications (2)
Publication Number | Publication Date |
---|---|
NO995886D0 NO995886D0 (no) | 1999-12-01 |
NO995886L true NO995886L (no) | 2000-01-26 |
Family
ID=26146601
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO995886A NO995886L (no) | 1997-06-02 | 1999-12-01 | Fremgangsmåte ved fremstilling av melamin |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0986547A1 (no) |
JP (1) | JP2002502416A (no) |
KR (1) | KR20010013245A (no) |
CN (1) | CN1265100A (no) |
AU (1) | AU728823B2 (no) |
CA (1) | CA2292597A1 (no) |
ID (1) | ID24348A (no) |
NO (1) | NO995886L (no) |
TW (1) | TW393450B (no) |
WO (1) | WO1998055466A1 (no) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6380385B1 (en) | 1995-12-07 | 2002-04-30 | Agrolinz Melanin Gmbh | Process for the preparation of pure melamine |
CN1144792C (zh) * | 1997-05-21 | 2004-04-07 | Dsm有限公司 | 制备蜜胺的方法 |
TWI221472B (en) * | 1997-10-15 | 2004-10-01 | Dsm Ip Assets Bv | Process for the preparation of melamine |
EP1035117A1 (en) | 1999-03-08 | 2000-09-13 | Dsm N.V. | Method for preparing melamine from urea |
DE50009875D1 (de) * | 1999-07-27 | 2005-04-28 | Ami Agrolinz Melamine Int Gmbh | Verfahren zur herstellung von festem melamin |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4565867A (en) * | 1984-01-05 | 1986-01-21 | Melamine Chemicals, Inc. | Anhydrous high-pressure melamine synthesis |
AT402295B (de) * | 1994-12-23 | 1997-03-25 | Agrolinz Melamin Gmbh | Verfahren zur reinigung von melamin |
AT402294B (de) * | 1994-12-23 | 1997-03-25 | Agrolinz Melamin Gmbh | Verfahren zur herstellung von hochreinem melamin |
AT402296B (de) * | 1995-02-03 | 1997-03-25 | Agrolinz Melamin Gmbh | Verfahren zur reinigung von melamin |
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 |
AT403579B (de) * | 1995-12-07 | 1998-03-25 | Agrolinz Melamin Gmbh | Verfahren zur herstellung von hochreinem melamin |
NL1003105C2 (nl) * | 1996-05-14 | 1997-11-18 | Dsm Nv | Werkwijze voor de bereiding van melamine. |
NL1003328C2 (nl) * | 1996-06-13 | 1997-12-17 | Dsm Nv | Werkwijze voor het bereiden van melamine. |
CA2291736A1 (en) * | 1997-05-28 | 1998-12-03 | Dsm N.V. | Method for preparing melamine |
-
1998
- 1998-05-15 WO PCT/NL1998/000281 patent/WO1998055466A1/en not_active Application Discontinuation
- 1998-05-15 CN CN98807620A patent/CN1265100A/zh active Pending
- 1998-05-15 AU AU75556/98A patent/AU728823B2/en not_active Ceased
- 1998-05-15 JP JP50213099A patent/JP2002502416A/ja active Pending
- 1998-05-15 CA CA002292597A patent/CA2292597A1/en not_active Abandoned
- 1998-05-15 EP EP98923217A patent/EP0986547A1/en not_active Ceased
- 1998-05-15 KR KR19997011236A patent/KR20010013245A/ko not_active Application Discontinuation
- 1998-05-15 ID IDW991500A patent/ID24348A/id unknown
- 1998-05-19 TW TW087107723A patent/TW393450B/zh not_active IP Right Cessation
-
1999
- 1999-12-01 NO NO995886A patent/NO995886L/no not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CA2292597A1 (en) | 1998-12-10 |
JP2002502416A (ja) | 2002-01-22 |
WO1998055466A1 (en) | 1998-12-10 |
NO995886D0 (no) | 1999-12-01 |
TW393450B (en) | 2000-06-11 |
AU728823B2 (en) | 2001-01-18 |
AU7555698A (en) | 1998-12-21 |
EP0986547A1 (en) | 2000-03-22 |
KR20010013245A (ko) | 2001-02-26 |
CN1265100A (zh) | 2000-08-30 |
ID24348A (id) | 2000-07-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FC2A | Withdrawal, rejection or dismissal of laid open patent application |