BE813065A - Alkali metal dithionites from formates - with sulphur dioxide and a basic alkali metal in 2-methoxyethanol avoiding pressure reaction - Google Patents

Alkali metal dithionites from formates - with sulphur dioxide and a basic alkali metal in 2-methoxyethanol avoiding pressure reaction

Info

Publication number
BE813065A
BE813065A BE142652A BE142652A BE813065A BE 813065 A BE813065 A BE 813065A BE 142652 A BE142652 A BE 142652A BE 142652 A BE142652 A BE 142652A BE 813065 A BE813065 A BE 813065A
Authority
BE
Belgium
Prior art keywords
alkali metal
methoxyethanol
pref
formate
reaction
Prior art date
Application number
BE142652A
Other languages
French (fr)
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
Priority claimed from GB1538673A external-priority patent/GB1461785A/en
Application filed filed Critical
Publication of BE813065A publication Critical patent/BE813065A/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B17/00—Sulfur; Compounds thereof
    • C01B17/64—Thiosulfates; Dithionites; Polythionates
    • C01B17/66—Dithionites or hydrosulfites (S2O42-)

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

Prepn. of alkali metal dithionites from formic acid or an alkali metal formate or both, SO2 and a basic alkali metal cpd., takes place in soln. or in suspension in 2-methoxyethanol forming the anhydrous dithionite. A S cpd. forming SO2 in the reaction media may also be used. Pref. the SO2 is dissolved in 2-methoxyethanol opt. with water, partic. at 20-35%. The SO2 soln. is introduced simultaneously with a soln. or suspension of basic alkali in water, methoxyethanol or both, into a similar suspension of formate or formic acid, or the formate or formic acid may be added with the basic alkali stream into the methoxyethanol. The reaction takes place at 60-90 degrees C pref. 70-85 degrees C. The alkali formate is pref. in a 20-40% excess over SO2 and the reaction is pref. carried out in an inert atmos. Previous process using lower alcohols has required a pressure reaction; the above gives as good a result using atmospheric pressure.
BE142652A 1973-03-30 1974-03-29 Alkali metal dithionites from formates - with sulphur dioxide and a basic alkali metal in 2-methoxyethanol avoiding pressure reaction BE813065A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1538673A GB1461785A (en) 1973-03-30 1973-03-30 Alkali metal dithionite manufacture

Publications (1)

Publication Number Publication Date
BE813065A true BE813065A (en) 1974-07-15

Family

ID=10058245

Family Applications (1)

Application Number Title Priority Date Filing Date
BE142652A BE813065A (en) 1973-03-30 1974-03-29 Alkali metal dithionites from formates - with sulphur dioxide and a basic alkali metal in 2-methoxyethanol avoiding pressure reaction

Country Status (1)

Country Link
BE (1) BE813065A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442418A1 (en) * 1974-09-05 1976-03-18 Basf Ag PROCESS FOR THE PRODUCTION OF SODIUM DITHIONITE

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2442418A1 (en) * 1974-09-05 1976-03-18 Basf Ag PROCESS FOR THE PRODUCTION OF SODIUM DITHIONITE

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