GB670501A - Improvements in or relating to the manufacture of melamine - Google Patents

Improvements in or relating to the manufacture of melamine

Info

Publication number
GB670501A
GB670501A GB24912/48A GB2491248A GB670501A GB 670501 A GB670501 A GB 670501A GB 24912/48 A GB24912/48 A GB 24912/48A GB 2491248 A GB2491248 A GB 2491248A GB 670501 A GB670501 A GB 670501A
Authority
GB
United Kingdom
Prior art keywords
bromide
cyanuric
halide
melamine
chloride
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
GB24912/48A
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.)
Beazer East Inc
Original Assignee
Koppers Co Inc
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 Koppers Co Inc filed Critical Koppers Co Inc
Publication of GB670501A publication Critical patent/GB670501A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)

Abstract

Melamine is made by reacting a cyanuric halide with 100-500 per cent of its weight of anhydrous ammonia above 100 DEG C. at a pressure greater than 500 p.s.i. Alternatively, the cyanuric halide may be reacted at atmospheric temperature to give a monohalo-diamino-triazine, and the reaction completed with more ammonia above 100 DEG C. The halide may be chloride, bromide or a mixture of the two. An organic solvent such as ether may be used if desired. The excess ammonia may be recovered and recycled, the ammonium halide removed by filtration and washing with water leaving melamine. Examples are given of the process. Specification 502,148 is referred to.ALSO:Cyanuric bromide is obtained by the bromination of hydrocyanic acid or sodium cyanide to give cyanogen bromide which is then polymerised at a low temperature with aluminium bromide. Use of aluminium chloride yields a product containing some cyanuric chloride. Specification 502,148, [Group IV (b)], is referred to.
GB24912/48A 1947-11-05 1948-09-23 Improvements in or relating to the manufacture of melamine Expired GB670501A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US670501XA 1947-11-05 1947-11-05

Publications (1)

Publication Number Publication Date
GB670501A true GB670501A (en) 1952-04-23

Family

ID=22073395

Family Applications (1)

Application Number Title Priority Date Filing Date
GB24912/48A Expired GB670501A (en) 1947-11-05 1948-09-23 Improvements in or relating to the manufacture of melamine

Country Status (2)

Country Link
DE (1) DE896196C (en)
GB (1) GB670501A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2779763A (en) * 1957-01-29 Process for the production of reaction
DE1179212B (en) * 1962-06-01 1964-10-08 Badische Anilin- &. Soda-Fabrik Aktiengesellschaft, Ludwigshafen/Rhein Process for the production of melamine.

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH200664A (en) * 1937-09-03 1938-10-31 Chem Ind Basel Process for the production of melamine.

Also Published As

Publication number Publication date
DE896196C (en) 1953-11-09

Similar Documents

Publication Publication Date Title
GB670501A (en) Improvements in or relating to the manufacture of melamine
US2715138A (en) Production of adiponitrile
GB873212A (en) Process for the manufacture of 1:1:1-trifluoro-2-chloro-2-bromethane
GB620713A (en) Improvements in or relating to the preparation of hydrazine
GB981534A (en) Improvements in and relating to a process for the preparation of cyanamide
GB974787A (en) Process for the production of methylene-bis-iminodiacetonitrile
GB622559A (en) Improvements in or relating to a process of producing diphenylacetonitrile and the product resulting therefrom
GB695592A (en) Improvements relating to beta-bromo-alpha-chloro-beta-formylacrylic acid and method of preparing same
GB593851A (en) Improvements in or relating to the manufacture of acrylonitrile
GB674813A (en) Process for the production of cyanogen chloride
US2575614A (en) Preparation of aminobenzothiazole
GB814238A (en) Process for the preparation of acrylonitrile
US2656384A (en) Fluorine containing urea derivatives
GB664026A (en) Preparation of diesters of succinic acid
GB696996A (en) Process for the production of ammonium sulphamate
GB921049A (en) Organo-silicon compounds
GB985290A (en) Improved process for the preparation of melamine
GB728522A (en) Improvements in the production of pure adiponitrile
GB762569A (en) Improvements in or relating to the manufacture of hydrazine hydrobromide
GB649123A (en) Improvements in or relating to the production of trichloracetic acid
GB636777A (en) Improvements in or relating to the production of amidines
GB775723A (en) Process for the production of allyl substituted acetylene compounds
GB636697A (en) Improvements in and relating to the manufacture of cyanamide and its derivatives
GB639681A (en) Improvements in or relating to the production of guandine sulphates
GB621982A (en) Improvements in or relating to the manufacture of melamine