GB1003277A - Process and apparatus for the production and separation of melamine - Google Patents

Process and apparatus for the production and separation of melamine

Info

Publication number
GB1003277A
GB1003277A GB120?8/64A GB120864A GB1003277A GB 1003277 A GB1003277 A GB 1003277A GB 120864 A GB120864 A GB 120864A GB 1003277 A GB1003277 A GB 1003277A
Authority
GB
United Kingdom
Prior art keywords
melamine
gases
separated
separation
production
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB120?8/64A
Inventor
Atsuo Murata
Mizuhiko Nagakura
Toshiro Ohba
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Chemical Corp
Original Assignee
Nissan Chemical Corp
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 Nissan Chemical Corp filed Critical Nissan Chemical Corp
Publication of GB1003277A publication Critical patent/GB1003277A/en
Expired legal-status Critical Current

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)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Melamine is separated from the molten melamine and associated waste gases emerging from the synthesis reactor in which melamine is produced by pyrolysis of urea, by contacting same with a quantity of cool gas sufficient to provide the resulting mixture with a temperature of from 60 DEG to 130 DEG C., whereby the molten melamine is caused to solidify and separate from the gases. The cooling gas may be ammonia, an inert gas or cooled recycled gases separated from the melamine. Specification 641,643 is referred to.
GB120?8/64A 1963-07-10 1964-03-20 Process and apparatus for the production and separation of melamine Expired GB1003277A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1226110T
JP3657463 1963-07-10

Publications (1)

Publication Number Publication Date
GB1003277A true GB1003277A (en) 1965-09-02

Family

ID=26011297

Family Applications (2)

Application Number Title Priority Date Filing Date
GB120?8/64A Expired GB1003277A (en) 1963-07-10 1964-03-20 Process and apparatus for the production and separation of melamine
GB28696/64A Expired GB1032326A (en) 1963-07-10 1964-07-10 A process for the production and separation of melamine

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB28696/64A Expired GB1032326A (en) 1963-07-10 1964-07-10 A process for the production and separation of melamine

Country Status (2)

Country Link
DE (1) DE1230029B (en)
GB (2) GB1003277A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500188A1 (en) 1984-01-05 1985-07-18 Melamine Chemicals, Inc., Donaldsonville, La. Continuous prodn. of high purity melamine from urea
US4565867A (en) * 1984-01-05 1986-01-21 Melamine Chemicals, Inc. Anhydrous high-pressure melamine synthesis
DE3546893C2 (en) * 1984-01-05 1995-10-26 Melamine Chemicals Inc Continuous prodn. of high purity melamine from urea

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT402295B (en) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh METHOD FOR PURIFYING MELAMINE
AT402294B (en) * 1994-12-23 1997-03-25 Agrolinz Melamin Gmbh METHOD FOR PRODUCING HIGH PURITY MELAMINE

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2755887A (en) * 1956-07-24 Melamine purification

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3500188A1 (en) 1984-01-05 1985-07-18 Melamine Chemicals, Inc., Donaldsonville, La. Continuous prodn. of high purity melamine from urea
US4565867A (en) * 1984-01-05 1986-01-21 Melamine Chemicals, Inc. Anhydrous high-pressure melamine synthesis
DE3546893C2 (en) * 1984-01-05 1995-10-26 Melamine Chemicals Inc Continuous prodn. of high purity melamine from urea
DE3546893C3 (en) * 1984-01-05 1998-01-29 Melamine Chemicals Inc Anhydrous high-pressure melamine synthesis

Also Published As

Publication number Publication date
DE1230029B (en) 1966-12-08
GB1032326A (en) 1966-06-08

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