FR2049779A5 - Recovery of chemicals from sulphite pulp - waste liquor - Google Patents

Recovery of chemicals from sulphite pulp - waste liquor

Info

Publication number
FR2049779A5
FR2049779A5 FR7020127A FR7020127A FR2049779A5 FR 2049779 A5 FR2049779 A5 FR 2049779A5 FR 7020127 A FR7020127 A FR 7020127A FR 7020127 A FR7020127 A FR 7020127A FR 2049779 A5 FR2049779 A5 FR 2049779A5
Authority
FR
France
Prior art keywords
waste liquor
chemicals
recovery
sulphite pulp
products
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
FR7020127A
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.)
Svenska Cellulosa AB
Original Assignee
Svenska Cellulosa 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 Svenska Cellulosa AB filed Critical Svenska Cellulosa AB
Application granted granted Critical
Publication of FR2049779A5 publication Critical patent/FR2049779A5/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
    • D21C11/12—Combustion of pulp liquors
    • D21C11/125—Decomposition of the pulp liquors in reducing atmosphere or in the absence of oxidants, i.e. gasification or pyrolysis

Landscapes

  • Paper (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Heat Treatment Of Water, Waste Water Or Sewage (AREA)

Abstract

Waste liquor from digestion of liquocellulose-containining material, paric. by the sulphate method, is dried to at least 45% dry content and pyrolysed in a reducing atmosphere, giving a sulphide-free soda-containing residue and a H2S-containing gas. Immediately after pyrolysis, the products are cooled by direct heat exchange with a suitable coolant and separated into gaseous, and solid residual, products. Pref. the coolant is water.
FR7020127A 1969-06-03 1970-06-02 Recovery of chemicals from sulphite pulp - waste liquor Expired FR2049779A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE778369A SE363651B (en) 1969-06-03 1969-06-03

Publications (1)

Publication Number Publication Date
FR2049779A5 true FR2049779A5 (en) 1971-03-26

Family

ID=20272294

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7020127A Expired FR2049779A5 (en) 1969-06-03 1970-06-02 Recovery of chemicals from sulphite pulp - waste liquor

Country Status (9)

Country Link
JP (1) JPS4832601B1 (en)
CS (1) CS158273B2 (en)
DE (1) DE2027094C3 (en)
ES (1) ES380313A1 (en)
FI (1) FI53473C (en)
FR (1) FR2049779A5 (en)
NO (1) NO134310C (en)
SE (1) SE363651B (en)
SU (1) SU503539A3 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2318976A1 (en) * 1975-07-21 1977-02-18 Zink Co John PROCESS FOR THE CONTINUOUS TREATMENT OF THE BLACK LIQUEUR OF A PROCESS FOR THE PRODUCTION OF SULPHATE OR SODA DOUGH

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4637858A (en) * 1985-02-25 1987-01-20 Crown Zellerbach Corporation Pyrolysis of black liquor at high temperatures using radiant energy
SE448173B (en) * 1985-06-03 1987-01-26 Croon Inventor Ab PROCEDURE FOR THE RECOVERY OF CELLULOSA DISPOSAL CHEMICALS BY PYROLYSIS
SE470066B (en) * 1991-07-16 1993-11-01 Chemrec Ab Extraction of chemicals and energy from cellulose wastes by gasification
FI20085416L (en) * 2008-05-06 2009-11-07 Metso Power Oy Method and equipment for treating pulp mill black liquor
FI123110B (en) * 2009-10-05 2012-11-15 Metso Power Oy Process and apparatus for treating the black liquor of a cellulose factory
CN107002359B (en) * 2014-09-22 2018-10-02 亨茨曼国际有限公司 Technique for handling black liquor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2318976A1 (en) * 1975-07-21 1977-02-18 Zink Co John PROCESS FOR THE CONTINUOUS TREATMENT OF THE BLACK LIQUEUR OF A PROCESS FOR THE PRODUCTION OF SULPHATE OR SODA DOUGH

Also Published As

Publication number Publication date
ES380313A1 (en) 1973-04-16
DE2027094A1 (en) 1970-12-10
DE2027094B2 (en) 1975-02-20
CS158273B2 (en) 1974-10-15
DE2027094C3 (en) 1975-10-09
FI53473C (en) 1978-05-10
NO134310C (en) 1976-09-15
NO134310B (en) 1976-06-08
SU503539A3 (en) 1976-02-15
SE363651B (en) 1974-01-28
FI53473B (en) 1978-01-31
JPS4832601B1 (en) 1973-10-08

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Legal Events

Date Code Title Description
ST Notification of lapse