GB985953A - Method of producing melamine fom ammonia and carbon oxysulphide - Google Patents

Method of producing melamine fom ammonia and carbon oxysulphide

Info

Publication number
GB985953A
GB985953A GB33046/62A GB3304662A GB985953A GB 985953 A GB985953 A GB 985953A GB 33046/62 A GB33046/62 A GB 33046/62A GB 3304662 A GB3304662 A GB 3304662A GB 985953 A GB985953 A GB 985953A
Authority
GB
United Kingdom
Prior art keywords
carrier
melamine
ammonia
moving
fom
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
GB33046/62A
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.)
Evonik Operations GmbH
Original Assignee
SKW Trostberg AG
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 SKW Trostberg AG filed Critical SKW Trostberg AG
Publication of GB985953A publication Critical patent/GB985953A/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Treating Waste Gases (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)

Abstract

Melamine is produced by charging a carrier of silica and/or alumina and/or activated carbon, preferably impregnated with 1 to 10% of phosphoric and/or sulphuric and/or boric acid, with ammonia and carbon oxysulphide in the volume ratio 2 to 3.5 : 1 at 60 DEG to 150 DEG C., heating the charged carrier to 250 DEG to 300 DEG C. in an ammonia atmosphere to form melamine and subliming the resulting melamine in an ammonia stream. The absorption phase may be effected at atmospheric or up to 10 atms-gauge pressure. The process may be made continuous by employing a number of phased reactors, or operating with a moving carrier countercurrent to gas flow, wherein the carrier moves through zones of suitable temperatures, or by moving the carrier through a trickling bed reactor for the changing cycle, to a rotary tube for reaction and fluidized bed for melamine desorption. Schematic diagrams are given (not shown) for such plant and the examples give details of their use.
GB33046/62A 1961-08-30 1962-08-28 Method of producing melamine fom ammonia and carbon oxysulphide Expired GB985953A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE1961S0075516 DE1141642B (en) 1961-08-30 1961-08-30 Process for the production of melamine from ammonia and carbon oxysulphide.

Publications (1)

Publication Number Publication Date
GB985953A true GB985953A (en) 1965-03-10

Family

ID=7505410

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33046/62A Expired GB985953A (en) 1961-08-30 1962-08-28 Method of producing melamine fom ammonia and carbon oxysulphide

Country Status (4)

Country Link
BE (1) BE621437A (en)
CH (1) CH415654A (en)
DE (1) DE1141642B (en)
GB (1) GB985953A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114939403A (en) * 2022-06-14 2022-08-26 宁波中科远东催化工程技术有限公司 Catalyst for producing melamine and preparation method and application thereof

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2557986A (en) * 1951-06-26 Preparation of melamine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114939403A (en) * 2022-06-14 2022-08-26 宁波中科远东催化工程技术有限公司 Catalyst for producing melamine and preparation method and application thereof
CN114939403B (en) * 2022-06-14 2024-01-26 宁波中科远东催化工程技术有限公司 Catalyst for producing melamine and preparation method and application thereof

Also Published As

Publication number Publication date
BE621437A (en) 1962-12-17
CH415654A (en) 1966-06-30
DE1141642B (en) 1962-12-27

Similar Documents

Publication Publication Date Title
GB1000957A (en) Process for reducing the concentration of mercury in hydrogen contaminated therewith
US3008796A (en) Method of purifying gases containing oxygen and oxides of nitrogen
GB959770A (en) Selective hydrogenation catalyst and the production thereof
ES428170A1 (en) Process for absorbing SO{HD 3
US2741543A (en) Process for the production of deuterium oxide
GB1096871A (en) Process for the recovery of gaseous sulphur compounds present in small quantities inresidual gases
GB985953A (en) Method of producing melamine fom ammonia and carbon oxysulphide
GB1480549A (en) Transport of heat energy
GB940960A (en) Process for the catalytic conversion of carbon monoxide with steam to form hydrogen and carbon dioxide
JPS56161841A (en) Manufacture of composite oxide catalyst
US3477830A (en) Production of sinterable uranium dioxide
GB1151316A (en) Improvements in or relating to a Claus Process
US3649169A (en) Treatment of gases
ES464565A1 (en) Catalytic reaction apparatus
US11390522B2 (en) Process for conversion of sulfur trioxide and hydrogen production
GB1151398A (en) Improvements in or relating to Claus Process
ES260137A1 (en) Acrylonitrile recovery process
GB1022917A (en) Process for the catalytic production of melamine from gaseous cyanic acid
ES429654A1 (en) Production of reducing gas
NL6908934A (en) Hydroxylamine preparation without commin - ution of catalyst
GB956002A (en) Process for the manufacture of catalysts for the production of monomeric vinyl estersin the gaseous phase
GB1341607A (en) Process for manufacturing anhydrous chromium sesquioxide vy reduction of a hexavalent compound of chromium
GB872256A (en) Improvements in methods for treating fuel gases
GB692234A (en) Process for the catalytic hydrogenation of carbon monoxide
GB893783A (en) Process for the production of atomic energy by a catalytic method