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CA2173191A1 - Electrochemical process - Google Patents

Electrochemical process

Info

Publication number
CA2173191A1
CA2173191A1 CA002173191A CA2173191A CA2173191A1 CA 2173191 A1 CA2173191 A1 CA 2173191A1 CA 002173191 A CA002173191 A CA 002173191A CA 2173191 A CA2173191 A CA 2173191A CA 2173191 A1 CA2173191 A1 CA 2173191A1
Authority
CA
Canada
Prior art keywords
electrochemical process
alkali metal
green liquor
sulfide
oxidize
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.)
Granted
Application number
CA002173191A
Other languages
French (fr)
Other versions
CA2173191C (en
Inventor
Johan Landfors
Bo Hakansson
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.)
Nouryon Pulp and Performance Chemicals AB
Original Assignee
Eka Nobel 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 Nobel AB filed Critical Eka Nobel AB
Publication of CA2173191A1 publication Critical patent/CA2173191A1/en
Application granted granted Critical
Publication of CA2173191C publication Critical patent/CA2173191C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0064—Aspects concerning the production and the treatment of green and white liquors, e.g. causticizing green liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0057—Oxidation of liquors, e.g. in order to reduce the losses of sulfur compounds, followed by evaporation or combustion if the liquor in question is a black liquor
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/04—Regeneration of pulp liquors or effluent waste waters of alkali lye

Landscapes

  • Paper (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)

Abstract

The invention relates to a method of producing pulp comprising a step of forming green liquor containing alkali metal sulfide and alkali metal carbonate. The method further comprises a step of electrochemically treating the green liquor to oxidize at least part of the sulfide therein.
CA002173191A 1995-04-06 1996-04-01 Electrochemical process Expired - Lifetime CA2173191C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9501287-8 1995-04-06
SE9501287A SE515833C2 (en) 1995-04-06 1995-04-06 Electrochemical oxidation of sulphide in green liquor

Publications (2)

Publication Number Publication Date
CA2173191A1 true CA2173191A1 (en) 1996-10-07
CA2173191C CA2173191C (en) 2001-06-05

Family

ID=20397879

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002173191A Expired - Lifetime CA2173191C (en) 1995-04-06 1996-04-01 Electrochemical process

Country Status (7)

Country Link
JP (1) JP3098422B2 (en)
BR (1) BR9601235A (en)
CA (1) CA2173191C (en)
FI (1) FI110878B (en)
NZ (1) NZ286303A (en)
PT (1) PT101862B (en)
SE (1) SE515833C2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4187826B2 (en) 1998-05-29 2008-11-26 川崎化成工業株式会社 Method for producing polysulfide by electrolytic oxidation
JP5504818B2 (en) 2009-10-23 2014-05-28 ソニー株式会社 Motion-related computing device, motion-related computing method, program, motion-related playback system

Also Published As

Publication number Publication date
PT101862A (en) 1996-11-29
JPH08284089A (en) 1996-10-29
BR9601235A (en) 1998-01-06
PT101862B (en) 1998-04-30
FI961467L (en) 1996-10-07
CA2173191C (en) 2001-06-05
SE9501287D0 (en) 1995-04-06
FI961467A0 (en) 1996-04-01
FI110878B (en) 2003-04-15
NZ286303A (en) 1997-05-26
SE9501287L (en) 1996-10-07
JP3098422B2 (en) 2000-10-16
SE515833C2 (en) 2001-10-15

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20160401