GB893438A - Process for the manufacture of alkali metal and alkaline earth metal chlorites - Google Patents

Process for the manufacture of alkali metal and alkaline earth metal chlorites

Info

Publication number
GB893438A
GB893438A GB1117/59A GB111759A GB893438A GB 893438 A GB893438 A GB 893438A GB 1117/59 A GB1117/59 A GB 1117/59A GB 111759 A GB111759 A GB 111759A GB 893438 A GB893438 A GB 893438A
Authority
GB
United Kingdom
Prior art keywords
solution
chlorine dioxide
acid
alkaline earth
earth metal
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
GB1117/59A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst 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 Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB893438A publication Critical patent/GB893438A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B11/00—Oxides or oxyacids of halogens; Salts thereof
    • C01B11/08—Chlorous acid
    • C01B11/10—Chlorites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Treatment Of Water By Oxidation Or Reduction (AREA)

Abstract

<PICT:0893438/III/1> In the production of alkali or alkaline earth metal chlorites by reducing chlorine dioxide in aqueous solution with alkali or alkaline earth metal amalgam, the pH is maintained between 7 and 9 by the continuous or discontinuous addition of a dilute acid, preferably 0,5 to 5 N nitric acid. The sodium nitrate so formed is effective to prevent corrosion by chlorine dioxide. As shown in the drawing, an aqueous solution of sodium chlorite is provided with a chlorine dioxide content of 1,22 grammes per litre by blowing a mixture of air and chlorine dioxide therethrough and the solution is then circulated through a reaction vessel 2 and a separator 3. Sodium amalgam is passed to the reaction vessel 2 and separated in separator 3, whilst 0,6 N nitric acid is introduced to the circulating solution through valve 5. Product sodium chlorite is withdrawn, in an amount equivalent to the nitric acid solution added, through overflow 6. To avoid local over-acidification of the solution, the acid is advantageously rapidly distributed by causing a whirling motion or a strong current in the vicinity of the valve 5 where the acid is introduced.
GB1117/59A 1958-01-10 1959-01-12 Process for the manufacture of alkali metal and alkaline earth metal chlorites Expired GB893438A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE893438X 1958-01-10

Publications (1)

Publication Number Publication Date
GB893438A true GB893438A (en) 1962-04-11

Family

ID=6846746

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1117/59A Expired GB893438A (en) 1958-01-10 1959-01-12 Process for the manufacture of alkali metal and alkaline earth metal chlorites

Country Status (1)

Country Link
GB (1) GB893438A (en)

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