ES265903A1 - Preparation of melamine - Google Patents

Preparation of melamine

Info

Publication number
ES265903A1
ES265903A1 ES0265903A ES265903A ES265903A1 ES 265903 A1 ES265903 A1 ES 265903A1 ES 0265903 A ES0265903 A ES 0265903A ES 265903 A ES265903 A ES 265903A ES 265903 A1 ES265903 A1 ES 265903A1
Authority
ES
Spain
Prior art keywords
melamine
ammonia
catalyst
preparation
phosphate
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
ES0265903A
Other languages
Spanish (es)
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 ES265903A1 publication Critical patent/ES265903A1/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
    • C07D251/56—Preparation of melamine

Landscapes

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

Abstract

Melamine is prepared by heating urea and/or a thermal decomposition product thereof (e.g. biuret, isocyanic acid or cyanuric acid) at a pressure not exceeding 2 atmospheres and at a temperature of at least 220 DEG C., in the presence of ammonia and of boron phosphate and/or aluminium phosphate. The ammonia may be used to maintain a fluidized bed of catalyst, the gases emergent therefrom being subsequently passed to a fixed bed of catalyst. Specifications 767,344, 825,729 and 910,197 are referred to.
ES0265903A 1960-03-23 1961-03-21 Preparation of melamine Expired ES265903A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL249750 1960-03-23

Publications (1)

Publication Number Publication Date
ES265903A1 true ES265903A1 (en) 1961-10-01

Family

ID=19752240

Family Applications (1)

Application Number Title Priority Date Filing Date
ES0265903A Expired ES265903A1 (en) 1960-03-23 1961-03-21 Preparation of melamine

Country Status (7)

Country Link
BE (1) BE601611A (en)
CA (2) CA633572A (en)
CH (1) CH409983A (en)
DE (1) DE1135482B (en)
ES (1) ES265903A1 (en)
GB (1) GB910198A (en)
SE (1) SE300211B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3218320A (en) * 1961-06-19 1965-11-16 Allied Chem Process for producing a melamine-urea product
US3290309A (en) * 1964-02-11 1966-12-06 Chemical Construction Corp Synthesis of melamine
EP2072504A1 (en) * 2007-12-20 2009-06-24 DSMIP Assets B.V. Process for the preparation of melamine

Also Published As

Publication number Publication date
BE601611A (en) 1961-09-21
CA633572A (en) 1961-12-26
CH409983A (en) 1966-03-31
CA697084A (en) 1964-11-03
DE1135482B (en) 1962-08-30
SE300211B (en) 1968-04-22
GB910198A (en) 1962-11-14

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