FR2166923A5 - Oxidation of sulphide in kraft process black liquor - - using two stage contact treatment with oxygen - Google Patents

Oxidation of sulphide in kraft process black liquor - - using two stage contact treatment with oxygen

Info

Publication number
FR2166923A5
FR2166923A5 FR7237469A FR7237469A FR2166923A5 FR 2166923 A5 FR2166923 A5 FR 2166923A5 FR 7237469 A FR7237469 A FR 7237469A FR 7237469 A FR7237469 A FR 7237469A FR 2166923 A5 FR2166923 A5 FR 2166923A5
Authority
FR
France
Prior art keywords
sulphide
black liquor
oxidation
oxygen
contact treatment
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
FR7237469A
Other languages
French (fr)
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.)
Air Liquide SA
Original Assignee
Air Liquide SA
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 Air Liquide SA filed Critical Air Liquide SA
Application granted granted Critical
Publication of FR2166923A5 publication Critical patent/FR2166923A5/en
Expired 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
    • D21C11/0057—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

Landscapes

  • Paper (AREA)

Abstract

The dil. black liquor is blown with 0.5-1 times the theoretical amt. of O2 required to convert its Na sulphide content to thiosulphate. After concentration the liquor is finally blown with O2 in a large excess of that required for complete oxidation of residual sulphide to thiosulphate. Conversions of 85-100% are achieved compared with 85% in prior processes, with minimal malodorous by products e.g. H2S and mercaptans which cause atmos. pollution.
FR7237469A 1971-10-25 1972-10-23 Oxidation of sulphide in kraft process black liquor - - using two stage contact treatment with oxygen Expired FR2166923A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8399771A JPS5347405B2 (en) 1971-10-25 1971-10-25

Publications (1)

Publication Number Publication Date
FR2166923A5 true FR2166923A5 (en) 1973-08-17

Family

ID=13818159

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7237469A Expired FR2166923A5 (en) 1971-10-25 1972-10-23 Oxidation of sulphide in kraft process black liquor - - using two stage contact treatment with oxygen

Country Status (2)

Country Link
JP (1) JPS5347405B2 (en)
FR (1) FR2166923A5 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57172124U (en) * 1981-04-24 1982-10-29
JPS58161123U (en) * 1982-04-20 1983-10-27 日産自動車株式会社 Swirl chamber diesel engine
US6627784B2 (en) 2000-05-17 2003-09-30 Hydro Dynamics, Inc. Highly efficient method of mixing dissimilar fluids using mechanically induced cavitation
US7771582B2 (en) 2003-05-19 2010-08-10 Hydro Dnamics, Inc. Method and apparatus for conducting a chemical reaction in the presence of cavitation and an electrical current
US8430968B2 (en) 2008-01-22 2013-04-30 Hydro Dynamics, Inc. Method of extracting starches and sugar from biological material using controlled cavitation

Also Published As

Publication number Publication date
JPS4861704A (en) 1973-08-29
JPS5347405B2 (en) 1978-12-21

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