GB379493A - Improvements in or relating to the manufacture of lime nitrogen - Google Patents

Improvements in or relating to the manufacture of lime nitrogen

Info

Publication number
GB379493A
GB379493A GB2231231A GB2231231A GB379493A GB 379493 A GB379493 A GB 379493A GB 2231231 A GB2231231 A GB 2231231A GB 2231231 A GB2231231 A GB 2231231A GB 379493 A GB379493 A GB 379493A
Authority
GB
United Kingdom
Prior art keywords
carbon
mixture
calcium
temperature
nitrogen
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
GB2231231A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB2231231A priority Critical patent/GB379493A/en
Publication of GB379493A publication Critical patent/GB379493A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
    • C01C3/00—Cyanogen; Compounds thereof
    • C01C3/002—Synthesis of metal cyanides or metal cyanamides from elementary nitrogen and carbides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Inorganic Chemistry (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

Calcium cyanamide is produced by heating a carbide-forming mixture at a temperature above 1600 DEG C. up to 1900 DEG C. in a current of nitrogen. If a mixture of calcium oxide and carbon is employed, it may be heated immediately to the above temperature. Incompletely calcined lime is preferred, and preferably the supply of nitrogen not commenced below 1600 DEG C. When calcium phosphate and carbon are used as initial materials, the mixture is first heated at 1000-1600 DEG C. until the whole of the phosphorus is liberated. If the raw material is calcium carbonate, the carbide-forming mixture is prepared by calcining with carbon at 900-1600 DEG C. and immediately thereafter heating in the same or an adjoining furnace to 1600-1900 DEG C. The cyanamide-forming stage may be followed by maintaining the temperature at 900-1200 DEG C. To prevent fusion, silicon-free carbon, for example peat, forge coal, or anthracite, is used. The initial materials may be briquetted, part of the carbon being added as tar or other binder. Specifications 279,370, [Class 1 (ii), Inorganic compounds, other than &c.], and 360,765 are referred to.
GB2231231A 1931-08-06 1931-08-06 Improvements in or relating to the manufacture of lime nitrogen Expired GB379493A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2231231A GB379493A (en) 1931-08-06 1931-08-06 Improvements in or relating to the manufacture of lime nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2231231A GB379493A (en) 1931-08-06 1931-08-06 Improvements in or relating to the manufacture of lime nitrogen

Publications (1)

Publication Number Publication Date
GB379493A true GB379493A (en) 1932-09-01

Family

ID=10177343

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2231231A Expired GB379493A (en) 1931-08-06 1931-08-06 Improvements in or relating to the manufacture of lime nitrogen

Country Status (1)

Country Link
GB (1) GB379493A (en)

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