GB299995A - Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity - Google Patents

Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity

Info

Publication number
GB299995A
GB299995A GB2806627A GB2806627A GB299995A GB 299995 A GB299995 A GB 299995A GB 2806627 A GB2806627 A GB 2806627A GB 2806627 A GB2806627 A GB 2806627A GB 299995 A GB299995 A GB 299995A
Authority
GB
United Kingdom
Prior art keywords
solutions
caustic soda
sodium chloride
caustic
sodium
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
GB2806627A
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
United Alkali Co 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 United Alkali Co Ltd filed Critical United Alkali Co Ltd
Priority to GB2806627A priority Critical patent/GB299995A/en
Publication of GB299995A publication Critical patent/GB299995A/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
    • C01D1/00—Oxides or hydroxides of sodium, potassium or alkali metals in general
    • C01D1/04—Hydroxides
    • C01D1/28—Purification; Separation
    • C01D1/32—Purification; Separation by absorption or precipitation

Abstract

299,995. Pritchard, D. A., and United Alkali Co., Ltd. Oct. 21, 1927. Caustic soda. - Dilute caustic liquor, e.g. effluent from electrolytic cells, may be purified from sodium chloride by evaporation, and subsequent addition of a salt or salts of sulphuric acids, such as sodium sulphate, or sulphuric acid itself. When metallic sulphates other than sodium are used, the metallic hydroxide formed by reaction with the caustic soda may be separated. The dilute liquor is evaporated until it contains from 37 to 39 per cent of NaO in solution, and the precipitated impurities are removed. The remaining sodium chloride is removed by treating the evaporated solution with sodium sulphate, anhydrous or otherwise, whereby a precipitate is obtained, containing the greater part of the sodium chloride. The clarified liquor may be used as such or evaporated to obtain solid caustic soda. The amount of sulphate added is dependent upon the amount of sodium chloride present.
GB2806627A 1927-10-21 1927-10-21 Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity Expired GB299995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2806627A GB299995A (en) 1927-10-21 1927-10-21 Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2806627A GB299995A (en) 1927-10-21 1927-10-21 Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity

Publications (1)

Publication Number Publication Date
GB299995A true GB299995A (en) 1928-11-08

Family

ID=10269720

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2806627A Expired GB299995A (en) 1927-10-21 1927-10-21 Improvements in the treatment of caustic solutions for the production of solutions and of solid caustic soda of a high degree of purity

Country Status (1)

Country Link
GB (1) GB299995A (en)

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