GB485215A - Process of manufacturing anhydrous sodium sulphite - Google Patents

Process of manufacturing anhydrous sodium sulphite

Info

Publication number
GB485215A
GB485215A GB202737A GB202737A GB485215A GB 485215 A GB485215 A GB 485215A GB 202737 A GB202737 A GB 202737A GB 202737 A GB202737 A GB 202737A GB 485215 A GB485215 A GB 485215A
Authority
GB
United Kingdom
Prior art keywords
solution
anhydrous sodium
iron
sodium sulphite
evaporation
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
GB202737A
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.)
A R MAAS CHEMICAL Co
Original Assignee
A R MAAS CHEMICAL Co
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 A R MAAS CHEMICAL Co filed Critical A R MAAS CHEMICAL Co
Priority to GB202737A priority Critical patent/GB485215A/en
Publication of GB485215A publication Critical patent/GB485215A/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
    • C01D5/00—Sulfates or sulfites of sodium, potassium or alkali metals in general
    • C01D5/14—Preparation of sulfites

Abstract

In the production of anhydrous sodium sulphite by evaporating and crystallizing a concentrated solution thereof, the solution is made alkaline with caustic alkali before evaporation, whereby any iron impurity is precipitated, the crystals formed do not scale, and iron apparatus is not attacked by the solution. The solution may be obtained by gassing a sodium carbonate solution with sulphur dioxide, filtering off impurities, boiling to remove residual carbon dioxide, and then adding caustic soda in slight excess of that required to precipitate iron. The solution, which should have a pH value of at least 10,34 is then evaporated under reduced pressure at a temperature between 55 DEG C. and its boiling point, evaporation and crystallization being simultaneous.
GB202737A 1937-01-23 1937-01-23 Process of manufacturing anhydrous sodium sulphite Expired GB485215A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB202737A GB485215A (en) 1937-01-23 1937-01-23 Process of manufacturing anhydrous sodium sulphite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB202737A GB485215A (en) 1937-01-23 1937-01-23 Process of manufacturing anhydrous sodium sulphite

Publications (1)

Publication Number Publication Date
GB485215A true GB485215A (en) 1938-05-17

Family

ID=9732318

Family Applications (1)

Application Number Title Priority Date Filing Date
GB202737A Expired GB485215A (en) 1937-01-23 1937-01-23 Process of manufacturing anhydrous sodium sulphite

Country Status (1)

Country Link
GB (1) GB485215A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8366793B2 (en) 2007-11-12 2013-02-05 Solvay Chemicals, Inc. Method of decarbonation and its use in producing crystalline sodium sulfite or other alkali products

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8366793B2 (en) 2007-11-12 2013-02-05 Solvay Chemicals, Inc. Method of decarbonation and its use in producing crystalline sodium sulfite or other alkali products

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