GB951668A - Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride - Google Patents

Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride

Info

Publication number
GB951668A
GB951668A GB1564961A GB1564961A GB951668A GB 951668 A GB951668 A GB 951668A GB 1564961 A GB1564961 A GB 1564961A GB 1564961 A GB1564961 A GB 1564961A GB 951668 A GB951668 A GB 951668A
Authority
GB
United Kingdom
Prior art keywords
sulphides
calcium chloride
hydrated lime
thiosulphates
removal
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
GB1564961A
Inventor
Anthony Robert Collicutt
Enoch Hatton
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1564961A priority Critical patent/GB951668A/en
Priority to FR895610A priority patent/FR1329021A/en
Priority to ES276903A priority patent/ES276903A1/en
Publication of GB951668A publication Critical patent/GB951668A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
    • C01D7/00—Carbonates of sodium, potassium or alkali metals in general
    • C01D7/18—Preparation by the ammonia-soda process
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F11/00—Compounds of calcium, strontium, or barium
    • C01F11/20—Halides
    • C01F11/24—Chlorides

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
  • Paper (AREA)

Abstract

Calcium chloride liquors, obtained by reacting ammonium chloride with hydrated lime, obtained from acetylene production, in the distiltillers of an ammonia-soda process, are freed from sulphite and fluosulphate impurities by heating the hydrated lime before entry into the distillation system to a temperature between 323-400 DEG C. to convert the fluosulphate to sulphides, admitting the lime to the distillation system and adding ferrous sulphate to the distilled to precipitate sulphides as ferrous sulphide. The sulphides are separated from the calcium chloride containing liquor and the liquor subjected to evaporation to obtain calcium chloride. The amount of ferrous sulphate added to the distillers is from 5-20% excess over that stoichiometrically equivalent to the total sulphide present in the hydrated lime after heating. Specification 945,960 is referred to.
GB1564961A 1961-05-01 1961-05-01 Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride Expired GB951668A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB1564961A GB951668A (en) 1961-05-01 1961-05-01 Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride
FR895610A FR1329021A (en) 1961-05-01 1962-04-25 removal of oxidizable sulfur compounds from hydrated lime used in the manufacture of calcium chloride
ES276903A ES276903A1 (en) 1961-05-01 1962-04-30 Calcium chloride manufacturing procedure (Machine-translation by Google Translate, not legally binding)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1564961A GB951668A (en) 1961-05-01 1961-05-01 Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride

Publications (1)

Publication Number Publication Date
GB951668A true GB951668A (en) 1964-03-11

Family

ID=10062937

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1564961A Expired GB951668A (en) 1961-05-01 1961-05-01 Removal of thiosulphates and sulphides from hydrated lime used to make calcium chloride

Country Status (2)

Country Link
ES (1) ES276903A1 (en)
GB (1) GB951668A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184490A1 (en) * 2015-12-25 2017-06-28 Zhenxi Zhou Method for recycling ammonia from low-concentration ammonium chloride wastewater

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3184490A1 (en) * 2015-12-25 2017-06-28 Zhenxi Zhou Method for recycling ammonia from low-concentration ammonium chloride wastewater

Also Published As

Publication number Publication date
ES276903A1 (en) 1962-06-16

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