GB639962A - Process for the production of melamine - Google Patents

Process for the production of melamine

Info

Publication number
GB639962A
GB639962A GB31685/47A GB3168547A GB639962A GB 639962 A GB639962 A GB 639962A GB 31685/47 A GB31685/47 A GB 31685/47A GB 3168547 A GB3168547 A GB 3168547A GB 639962 A GB639962 A GB 639962A
Authority
GB
United Kingdom
Prior art keywords
melamine
production
urea
referred
atmos
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
GB31685/47A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB639962A publication Critical patent/GB639962A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Phenolic Resins Or Amino Resins (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Melamine is produced by heating urea in the absence of added ammonia or diluent gas, at a pressure of at least 400 atmos., to 385-550 DEG C., using a reaction time of from less than 3.5 down to 0.3 minutes. The process is otherwise as described in Specification 628,255 and the compounds referred to therein may be used instead of urea. Specifications 628,250 and 628,255 are referred to.
GB31685/47A 1946-03-27 1947-12-01 Process for the production of melamine Expired GB639962A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US639962XA 1946-03-27 1946-03-27

Publications (1)

Publication Number Publication Date
GB639962A true GB639962A (en) 1950-07-12

Family

ID=22052865

Family Applications (1)

Application Number Title Priority Date Filing Date
GB31685/47A Expired GB639962A (en) 1946-03-27 1947-12-01 Process for the production of melamine

Country Status (1)

Country Link
GB (1) GB639962A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776284A (en) * 1957-01-01 Apparatus and method for producing melamine
DE1028126B (en) * 1952-01-17 1958-04-17 American Cyanamid Co Process for the preparation of a mixture containing melamine and cyanamide from urea
US2856408A (en) * 1958-10-14 Fsobuction of melamine
US2918467A (en) * 1959-12-22 Production of melamine
DE975688C (en) * 1953-03-29 1962-05-10 Sueddeutsche Kalkstickstoff Process for the production of melamine from urea
DE1180374B (en) * 1961-11-14 1964-10-29 Ivan Tahy Dipl Chem Process and device for the continuous production of melamine
US3161638A (en) * 1964-12-15 Filter

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2776284A (en) * 1957-01-01 Apparatus and method for producing melamine
US2856408A (en) * 1958-10-14 Fsobuction of melamine
US2918467A (en) * 1959-12-22 Production of melamine
US3161638A (en) * 1964-12-15 Filter
DE1028126B (en) * 1952-01-17 1958-04-17 American Cyanamid Co Process for the preparation of a mixture containing melamine and cyanamide from urea
DE975688C (en) * 1953-03-29 1962-05-10 Sueddeutsche Kalkstickstoff Process for the production of melamine from urea
DE1180374B (en) * 1961-11-14 1964-10-29 Ivan Tahy Dipl Chem Process and device for the continuous production of melamine

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