GB867199A - Improvements in the production of anhydrous sodium sulphite - Google Patents

Improvements in the production of anhydrous sodium sulphite

Info

Publication number
GB867199A
GB867199A GB9523/59A GB952359A GB867199A GB 867199 A GB867199 A GB 867199A GB 9523/59 A GB9523/59 A GB 9523/59A GB 952359 A GB952359 A GB 952359A GB 867199 A GB867199 A GB 867199A
Authority
GB
United Kingdom
Prior art keywords
sodium sulphite
anhydrous sodium
stages
stage
maintained
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
GB9523/59A
Inventor
Walter Spormann
Joachim Heinke
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.)
BASF SE
Original Assignee
BASF SE
Badische Anilin and Sodafabrik 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 BASF SE, Badische Anilin and Sodafabrik AG filed Critical BASF SE
Publication of GB867199A publication Critical patent/GB867199A/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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Preparation Of Compounds By Using Micro-Organisms (AREA)

Abstract

Anhydrous sodium sulphite, of grain size 0.09-0.75 mm. is prepared by heating sodium sulphite heptahydrate to split off the water of crystallisation, and separating the anhydrous sodium sulphite from the resulting aqueous suspension. The heating is carried out in at least two stages, the temperature in the first stage being maintained at 33.4 DEG C. to 40 DEG C., and increasing temperatures being maintained in the subsequent stage or stages, such that in the final stage a temperature of 90 DEG C. to 103 DEG C. is maintained. The residence times in the various stages are so adjusted that the desired grain size is obtained. The process may be carried out in continuous fashion by continuously supplying the sodium sulphite dry, moist or in aqueous suspension to the first stage and allowing the resulting liquid to flow through the following stages.
GB9523/59A 1958-03-21 1959-03-19 Improvements in the production of anhydrous sodium sulphite Expired GB867199A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE867199X 1958-03-21

Publications (1)

Publication Number Publication Date
GB867199A true GB867199A (en) 1961-05-03

Family

ID=6802109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9523/59A Expired GB867199A (en) 1958-03-21 1959-03-19 Improvements in the production of anhydrous sodium sulphite

Country Status (1)

Country Link
GB (1) GB867199A (en)

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