GB825729A - Method of producing melamine - Google Patents

Method of producing melamine

Info

Publication number
GB825729A
GB825729A GB40217/57A GB4021757A GB825729A GB 825729 A GB825729 A GB 825729A GB 40217/57 A GB40217/57 A GB 40217/57A GB 4021757 A GB4021757 A GB 4021757A GB 825729 A GB825729 A GB 825729A
Authority
GB
United Kingdom
Prior art keywords
boron
urea
ammonia
salts
weight
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
GB40217/57A
Inventor
Harry Edward Jackson
Basil Mcdonnell
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.)
Teck Metals Ltd
Original Assignee
Teck Metals Ltd
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 Teck Metals Ltd filed Critical Teck Metals Ltd
Priority to GB40217/57A priority Critical patent/GB825729A/en
Publication of GB825729A publication Critical patent/GB825729A/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

Landscapes

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

Abstract

Melamine is prepared by reacting at least one of the groups of compounds (a) urea and ammonium sulphamate, (b) urea and sulphur dioxide, (c) guanidine sulphamate, at 200-360 DEG C., under a superatmospheric pressure of ammonia, in the presence of at least 0.001%, by weight of the total reaction charge, of boron or a boron compound. Suitable catalysts include boron nitride, carbide, fluorides (including BF3 addition compounds such as the etherate), oxides, and boron acids and salts, particularly alkali metal and ammonium metaborates and tetraborates; hydroxyfluoboric and fluoboric acids and salts; and the reaction products of boric acid or a boron oxide with phosphorus pentoxide or a phosphoric acid. A preferred amount of catalyst is 0.5% by weight of the total reaction charge. Preferred pressures of ammonia are 34-68 atmospheres. Reference has been directed by the Comptroller to Specifications 704,593, 713,223 and 719,662.
GB40217/57A 1957-12-27 1957-12-27 Method of producing melamine Expired GB825729A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB40217/57A GB825729A (en) 1957-12-27 1957-12-27 Method of producing melamine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB40217/57A GB825729A (en) 1957-12-27 1957-12-27 Method of producing melamine

Publications (1)

Publication Number Publication Date
GB825729A true GB825729A (en) 1959-12-23

Family

ID=10413790

Family Applications (1)

Application Number Title Priority Date Filing Date
GB40217/57A Expired GB825729A (en) 1957-12-27 1957-12-27 Method of producing melamine

Country Status (1)

Country Link
GB (1) GB825729A (en)

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