SE9600977L - Use of filtrates from acid treatment steps in the preparation of cooking liquor - Google Patents

Use of filtrates from acid treatment steps in the preparation of cooking liquor

Info

Publication number
SE9600977L
SE9600977L SE9600977A SE9600977A SE9600977L SE 9600977 L SE9600977 L SE 9600977L SE 9600977 A SE9600977 A SE 9600977A SE 9600977 A SE9600977 A SE 9600977A SE 9600977 L SE9600977 L SE 9600977L
Authority
SE
Sweden
Prior art keywords
filtrate
alkaline
green liquor
liquor
produce
Prior art date
Application number
SE9600977A
Other languages
Swedish (sv)
Other versions
SE9600977D0 (en
Inventor
Hans G Lindberg
Original Assignee
Ahlstrom Machinery Inc
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 Ahlstrom Machinery Inc filed Critical Ahlstrom Machinery Inc
Publication of SE9600977D0 publication Critical patent/SE9600977D0/en
Publication of SE9600977L publication Critical patent/SE9600977L/en

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
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • D21C11/0028—Effluents derived from the washing or bleaching plants
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills

Landscapes

  • Paper (AREA)

Abstract

Acidic bleach plant effluents from a cellulose pulp mill utilizing a sodium-based cooking process are effectively utilized without contamination of pulp mill processes with undesirable metal ions. The bleach plant effluent, in the form of filtrate, is treated with an alkaline stream to precipitate solids containingmetals from the filtrate, producing a reduced metal content filtrate. The reduced metal content filtrate is used to wash or dilute lime mud which is in turn used to produce lime for causticizing green liquor to produce white liquor.Acid filtrate which is not treated to remove metals may be used to dissolve smelt from the recovery boiler to make green liquor which is clarified to produce clarified green liquor and dregs containing metals. The alkaline stream used to precipitate solids from the acidic filtrate is preferably clarified green liquor or white liquor, although an alkaline filtrate from an alkaline bleaching or delignification stage may be used.
SE9600977A 1995-03-17 1996-03-14 Use of filtrates from acid treatment steps in the preparation of cooking liquor SE9600977L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US40524395A 1995-03-17 1995-03-17

Publications (2)

Publication Number Publication Date
SE9600977D0 SE9600977D0 (en) 1996-03-14
SE9600977L true SE9600977L (en) 1996-09-18

Family

ID=23602876

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9600977A SE9600977L (en) 1995-03-17 1996-03-14 Use of filtrates from acid treatment steps in the preparation of cooking liquor

Country Status (4)

Country Link
JP (1) JPH0921088A (en)
CA (1) CA2171595A1 (en)
FI (1) FI961191A7 (en)
SE (1) SE9600977L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI129811B (en) * 2019-08-23 2022-09-15 Upm Kymmene Corp A process for reducing phosphorus in effluents from a pulping process

Also Published As

Publication number Publication date
JPH0921088A (en) 1997-01-21
FI961191A0 (en) 1996-03-14
CA2171595A1 (en) 1996-09-18
FI961191L (en) 1996-09-18
SE9600977D0 (en) 1996-03-14
FI961191A7 (en) 1996-09-18

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