SE9400016L - Recycling process for bleaching of pulp - Google Patents

Recycling process for bleaching of pulp

Info

Publication number
SE9400016L
SE9400016L SE9400016A SE9400016A SE9400016L SE 9400016 L SE9400016 L SE 9400016L SE 9400016 A SE9400016 A SE 9400016A SE 9400016 A SE9400016 A SE 9400016A SE 9400016 L SE9400016 L SE 9400016L
Authority
SE
Sweden
Prior art keywords
bleaching
liquor
black liquor
cooking liquor
effluent
Prior art date
Application number
SE9400016A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9400016D0 (en
Inventor
Nils Mannbro
Original Assignee
Nils Mannbro
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 Nils Mannbro filed Critical Nils Mannbro
Priority to SE9400016A priority Critical patent/SE9400016L/en
Publication of SE9400016D0 publication Critical patent/SE9400016D0/en
Priority to PCT/SE1995/000002 priority patent/WO1995018884A1/en
Publication of SE9400016L publication Critical patent/SE9400016L/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

Abstract

A process for kraft paper fibre pulping and bleaching of lignocellulose material by delignification with alkaline liquors in various digestion and bleaching sequences. Black liquor is displaced through the wood chips, charged to the pulping digester, thereby enabling the use of bleaching stage filtrate or composite bleach plant effluent for displacement of cooking liquor rather than the conventional displacement through brownstock washing stages from which black liquor is discharged. Carry-over with pulp of cooking liquor alkali contributes to alkalinity in the processing steps of the effluent so that the inorganic combustion residue has an excess of soda as compared to sulphate and optional chloride. By withdrawing black liquor directly from charged wood chips material, no dilution occurs at this operation while carry-over of cooking liquor diluted with bleach plant effluent can be economically concentrated, e.g. by Mechanical Vapor Compression Evaporation (MVCE).
SE9400016A 1994-01-04 1994-01-04 Recycling process for bleaching of pulp SE9400016L (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE9400016A SE9400016L (en) 1994-01-04 1994-01-04 Recycling process for bleaching of pulp
PCT/SE1995/000002 WO1995018884A1 (en) 1994-01-04 1995-01-04 Process for the recovery of chemicals and energy from pulp bleaching effluent

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9400016A SE9400016L (en) 1994-01-04 1994-01-04 Recycling process for bleaching of pulp

Publications (2)

Publication Number Publication Date
SE9400016D0 SE9400016D0 (en) 1994-01-04
SE9400016L true SE9400016L (en) 1995-07-05

Family

ID=20392500

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9400016A SE9400016L (en) 1994-01-04 1994-01-04 Recycling process for bleaching of pulp

Country Status (2)

Country Link
SE (1) SE9400016L (en)
WO (1) WO1995018884A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI122246B (en) * 2007-06-15 2011-10-31 Andritz Oy Procedure for treating pulp at a pulp mill
CN105421134A (en) * 2014-09-22 2016-03-23 丹阳市华兴纸箱有限公司 Production process for package kraft paper

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE435302B (en) * 1974-10-08 1984-09-17 Mannbro Sys Hb SET FOR TREATMENT OF PREPARES FROM DELIGNIFICATION OF LIGNOCELLULOSAMATER WITH CHLORIDE-CREATING BLEACH

Also Published As

Publication number Publication date
SE9400016D0 (en) 1994-01-04
WO1995018884A1 (en) 1995-07-13

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