GB358276A - Improvements in the manufacture and production of cyanamides of the alkaline earth metals - Google Patents

Improvements in the manufacture and production of cyanamides of the alkaline earth metals

Info

Publication number
GB358276A
GB358276A GB2985530A GB2985530A GB358276A GB 358276 A GB358276 A GB 358276A GB 2985530 A GB2985530 A GB 2985530A GB 2985530 A GB2985530 A GB 2985530A GB 358276 A GB358276 A GB 358276A
Authority
GB
United Kingdom
Prior art keywords
cyanamides
earth metals
manufacture
cyanogen
production
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
GB2985530A
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie 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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to GB2985530A priority Critical patent/GB358276A/en
Publication of GB358276A publication Critical patent/GB358276A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/16—Cyanamide; Salts thereof
    • C01C3/18—Calcium cyanamide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/16—Cyanamide; Salts thereof

Abstract

Cyanamides of the alkaline-earth metals, including magnesium, are prepared by treating the oxides of carbonates with cyanogen or gases containing the same at temperatures between 300 DEG and 900 DEG C., preferably between 350 DEG and 600 DEG C. For calcium oxide the temperature should be at least about 300 DEG C., for calcium carbonate or magnesium oxide 400 DEG C., and for magnesium carbonate 500 DEG C. The initial material may be from any source such as limestone, dolomite, magnesite, witherite, or the oxides obtained therefrom, and is preferably in granular form. According to examples the cyanogen may be diluted with nitrogen, hydrogen, carbon monoxide or ammonia. In the last case, the carbon monoxide formed reacts with the ammonia to form hydrocyanic acid, part of which is bound by the lime and the rest leaves the reaction vessel in a free state.
GB2985530A 1930-10-06 1930-10-06 Improvements in the manufacture and production of cyanamides of the alkaline earth metals Expired GB358276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2985530A GB358276A (en) 1930-10-06 1930-10-06 Improvements in the manufacture and production of cyanamides of the alkaline earth metals

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2985530A GB358276A (en) 1930-10-06 1930-10-06 Improvements in the manufacture and production of cyanamides of the alkaline earth metals

Publications (1)

Publication Number Publication Date
GB358276A true GB358276A (en) 1931-10-08

Family

ID=10298296

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2985530A Expired GB358276A (en) 1930-10-06 1930-10-06 Improvements in the manufacture and production of cyanamides of the alkaline earth metals

Country Status (1)

Country Link
GB (1) GB358276A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797979A (en) * 1951-07-23 1957-07-02 Daniels Joseph Manufacture of cyanamides
DE972551C (en) * 1953-01-09 1959-08-13 Sueddeutsche Kalkstickstoff Process for the production of white calcium cyanamide

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2797979A (en) * 1951-07-23 1957-07-02 Daniels Joseph Manufacture of cyanamides
DE972551C (en) * 1953-01-09 1959-08-13 Sueddeutsche Kalkstickstoff Process for the production of white calcium cyanamide

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