GB974145A - Method for the preparation of cyanic acid vapour from urea - Google Patents

Method for the preparation of cyanic acid vapour from urea

Info

Publication number
GB974145A
GB974145A GB2892262A GB2892262A GB974145A GB 974145 A GB974145 A GB 974145A GB 2892262 A GB2892262 A GB 2892262A GB 2892262 A GB2892262 A GB 2892262A GB 974145 A GB974145 A GB 974145A
Authority
GB
United Kingdom
Prior art keywords
urea
ammonia
cyanic acid
gas
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
GB2892262A
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.)
Osterreichische Stickstoffwerke AG
Patheon Austria GmbH and Co KG
Original Assignee
Chemie Linz AG
Osterreichische Stickstoffwerke 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 Chemie Linz AG, Osterreichische Stickstoffwerke AG filed Critical Chemie Linz AG
Publication of GB974145A publication Critical patent/GB974145A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/20—Thiocyanic acid; Salts thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/001—Preparation by decomposing nitrogen-containing organic compounds, e.g. molasse waste or urea

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Cyanic acid vapour is produced by heating urea within five seconds by vaporizing the urea in an exclusively or mainly indirectly heated bed of sand, fluidized by a stream of gas, at a temperature from 250 DEG to 400 DEG C. under substantially anhydrous conditions and either maintaining the mixture of cyanic acid and ammonia at above 170 DEG C. or chemically removing the ammonia. The ammonia may be removed by adding hydrogen chloride at above 170 DEG C. and separating the ammonium chloride as a solid after cooling. The fluidizing gas may be nitrogen or ammonia. The urea can be introduced either from above or from below by means of a gas.
GB2892262A 1961-08-22 1962-07-27 Method for the preparation of cyanic acid vapour from urea Expired GB974145A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT646361 1961-08-22

Publications (1)

Publication Number Publication Date
GB974145A true GB974145A (en) 1964-11-04

Family

ID=3586560

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2892262A Expired GB974145A (en) 1961-08-22 1962-07-27 Method for the preparation of cyanic acid vapour from urea

Country Status (2)

Country Link
CH (1) CH416584A (en)
GB (1) GB974145A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652209A (en) * 1968-03-01 1972-03-28 Oesterr Stickstoffwerke Ag Process for the production of a cyanic acid-ammonia gas mixture
EP0693484A1 (en) * 1994-07-22 1996-01-24 Chemie Linz GmbH Process for the preparation of cyanuric acid by deposition from a gaseous isocyanic acid-ammonia mixture

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3652209A (en) * 1968-03-01 1972-03-28 Oesterr Stickstoffwerke Ag Process for the production of a cyanic acid-ammonia gas mixture
EP0693484A1 (en) * 1994-07-22 1996-01-24 Chemie Linz GmbH Process for the preparation of cyanuric acid by deposition from a gaseous isocyanic acid-ammonia mixture

Also Published As

Publication number Publication date
CH416584A (en) 1966-07-15

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