GB944685A - Preparation of melamine - Google Patents

Preparation of melamine

Info

Publication number
GB944685A
GB944685A GB22767/62A GB2276762A GB944685A GB 944685 A GB944685 A GB 944685A GB 22767/62 A GB22767/62 A GB 22767/62A GB 2276762 A GB2276762 A GB 2276762A GB 944685 A GB944685 A GB 944685A
Authority
GB
United Kingdom
Prior art keywords
melamine
catalyst
ammonia
urea
preparation
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
GB22767/62A
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.)
Stamicarbon BV
Original Assignee
Stamicarbon BV
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 Stamicarbon BV filed Critical Stamicarbon BV
Publication of GB944685A publication Critical patent/GB944685A/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)
  • Catalysts (AREA)

Abstract

A continuous process for the production of melamine comprises heating urea in the presence of ammonia in a fluidised bed of inert solid particles so that the urea decomposes and passing the resulting gases together with the ammonia gas through one or more catalyst beds, thus forming melamine. The catalyst is preferably in a fluidised state. Specified inert solids are sand, carborandum and corundum. Examples are given, using as catalysts (1) silica gel grains and (2) aluminum phosphate. Specification 910,197 is referred to.
GB22767/62A 1961-06-14 1962-06-13 Preparation of melamine Expired GB944685A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL265955 1961-06-14

Publications (1)

Publication Number Publication Date
GB944685A true GB944685A (en) 1963-12-18

Family

ID=19753090

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22767/62A Expired GB944685A (en) 1961-06-14 1962-06-13 Preparation of melamine

Country Status (1)

Country Link
GB (1) GB944685A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392172A (en) * 1965-04-05 1968-07-09 Cominco Ltd Cominco Ltee Process for the preparation of melamine from urea

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3392172A (en) * 1965-04-05 1968-07-09 Cominco Ltd Cominco Ltee Process for the preparation of melamine from urea

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