SE9502078L - Methods of producing chlorine dioxide - Google Patents

Methods of producing chlorine dioxide

Info

Publication number
SE9502078L
SE9502078L SE9502078A SE9502078A SE9502078L SE 9502078 L SE9502078 L SE 9502078L SE 9502078 A SE9502078 A SE 9502078A SE 9502078 A SE9502078 A SE 9502078A SE 9502078 L SE9502078 L SE 9502078L
Authority
SE
Sweden
Prior art keywords
alkali metal
solid
metal sulfate
chlorine dioxide
sulfate
Prior art date
Application number
SE9502078A
Other languages
Swedish (sv)
Other versions
SE9502078D0 (en
Inventor
Anders Dahl
Roy Hammer-Olsen
Phil Byrne
Original Assignee
Eka Chemicals Ab
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 Eka Chemicals Ab filed Critical Eka Chemicals Ab
Priority to SE9502078A priority Critical patent/SE9502078L/en
Publication of SE9502078D0 publication Critical patent/SE9502078D0/en
Priority to CA002178044A priority patent/CA2178044C/en
Priority to NZ286722A priority patent/NZ286722A/en
Priority to US08/659,261 priority patent/US6585950B1/en
Publication of SE9502078L publication Critical patent/SE9502078L/en

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
    • C01B11/02—Oxides of chlorine
    • C01B11/022—Chlorine dioxide (ClO2)
    • C01B11/023—Preparation from chlorites or chlorates
    • C01B11/025—Preparation from chlorites or chlorates from chlorates without any other reaction reducing agent than chloride ions
    • 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

Abstract

The invention relates to a process of producing chlorine dioxide comprising the steps of reducing chlorate ions in an acid reaction medium maintained in a reaction zone of a chlorine dioxide generator, which reaction medium contains alkali metal ions and sulfate ions, so to form chlorine dioxide and a solid salt of acidic alkali metal sulfate. The process further comprises the steps of separating said solid acidic alkali metal sulfate from the reaction medium, contacting said solid acldic alkali metal sulfate with an aqueous medium in a mixing tank to effect at least partial conversion to neutral solid alkali metal sulfate, separating the at least partially neutralized solid alkali metal sulfate from the aqueous medium on a rotary drum filter operating with vacuum inside and with part of the drum submerged in a slurry of the at least partially neutralized solid alkali metal sulfate and the aqueous medium, and forming an acid filtrate.
SE9502078A 1995-06-07 1995-06-07 Methods of producing chlorine dioxide SE9502078L (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
SE9502078A SE9502078L (en) 1995-06-07 1995-06-07 Methods of producing chlorine dioxide
CA002178044A CA2178044C (en) 1995-06-07 1996-06-03 Method of producing chlorine dioxide
NZ286722A NZ286722A (en) 1995-06-07 1996-06-04 Preparation of chlorine dioxide by reduction of chlorate in the presence of alkali metal and sulphate ions; recovery of alkali metal sulphate having reduced acidity
US08/659,261 US6585950B1 (en) 1995-06-07 1996-06-06 Method of producing chlorine dioxide

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9502078A SE9502078L (en) 1995-06-07 1995-06-07 Methods of producing chlorine dioxide

Publications (2)

Publication Number Publication Date
SE9502078D0 SE9502078D0 (en) 1995-06-07
SE9502078L true SE9502078L (en) 1996-08-22

Family

ID=20398545

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9502078A SE9502078L (en) 1995-06-07 1995-06-07 Methods of producing chlorine dioxide

Country Status (3)

Country Link
CA (1) CA2178044C (en)
NZ (1) NZ286722A (en)
SE (1) SE9502078L (en)

Also Published As

Publication number Publication date
SE9502078D0 (en) 1995-06-07
CA2178044A1 (en) 1996-12-08
NZ286722A (en) 1997-11-24
CA2178044C (en) 1999-05-18

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