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NZ233237A - Process for treating a fiber pulp with a chemical solution - Google Patents

Process for treating a fiber pulp with a chemical solution

Info

Publication number
NZ233237A
NZ233237A NZ233237A NZ23323790A NZ233237A NZ 233237 A NZ233237 A NZ 233237A NZ 233237 A NZ233237 A NZ 233237A NZ 23323790 A NZ23323790 A NZ 23323790A NZ 233237 A NZ233237 A NZ 233237A
Authority
NZ
New Zealand
Prior art keywords
treatment
bed
active chemicals
chemical solution
solution
Prior art date
Application number
NZ233237A
Inventor
Hakan Ostman
Original Assignee
Hackman Process Ltd
Salomans Oy
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 Hackman Process Ltd, Salomans Oy filed Critical Hackman Process Ltd
Publication of NZ233237A publication Critical patent/NZ233237A/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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1031—Pulse, dynamic, displacement processes
    • 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
    • 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
    • D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • D21C9/06—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents in filters ; Washing of concentrated pulp, e.g. pulp mats, on filtering surfaces

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
  • Communication Cables (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The process relates to continuous treatment of a fiber pulp with a chemical solution by forming on a filter surface a bed of a fiber material suspension and by feeding it through one or several chemical treatment steps in which the chemical solution is displaced through the bed. According to the method, there are used in each treatment step two different treatment liquids which are successively displaced through the bed. The first treatment solution is a chemical solution which contains a greater amount of active chemicals than is consumed in the reactions occurring in the pulp bed, preferably approx. twice the amount. The second treatment liquid is a solution which does not contain active chemicals in an amount significant in terms of the reaction. Its purpose is not only to displace that portion of the first treatment liquid from which the active chemicals have been spent but also that portion which still contains active chemicals upon leaving as a filtrate. Of the filtrate of the treatment step, that fraction is recovered which has the highest concentration of active chemicals and contains most of the active chemicals leaving the bed and is in its amount only so large that, when reinforced with a fresh chemical solution, it can be used in its entirety as the first treatment solution. The total liquid volume of the treatment liquids is substantially greater than the liquid volume present in the bed upon its leaving the treatment step - preferably 2- to 3-fold.
NZ233237A 1989-04-07 1990-04-06 Process for treating a fiber pulp with a chemical solution NZ233237A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI891662A FI85513C (en) 1989-04-07 1989-04-07 FOERFARANDE FOER BEHANDLING AV FIBERMASSA MED KEMIKALIELOESNING.

Publications (1)

Publication Number Publication Date
NZ233237A true NZ233237A (en) 1993-02-25

Family

ID=8528196

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ233237A NZ233237A (en) 1989-04-07 1990-04-06 Process for treating a fiber pulp with a chemical solution

Country Status (13)

Country Link
EP (1) EP0466752B1 (en)
JP (1) JPH05500835A (en)
AT (1) ATE140282T1 (en)
AU (1) AU647020B2 (en)
BR (1) BR9007276A (en)
CA (1) CA2049951A1 (en)
DE (1) DE69027770T2 (en)
ES (1) ES2091240T3 (en)
FI (1) FI85513C (en)
NO (1) NO176485C (en)
NZ (1) NZ233237A (en)
WO (1) WO1990012146A1 (en)
ZA (1) ZA902703B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6423183B1 (en) 1997-12-24 2002-07-23 Kimberly-Clark Worldwide, Inc. Paper products and a method for applying a dye to cellulosic fibers
US6749721B2 (en) 2000-12-22 2004-06-15 Kimberly-Clark Worldwide, Inc. Process for incorporating poorly substantive paper modifying agents into a paper sheet via wet end addition
US6582560B2 (en) 2001-03-07 2003-06-24 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
US7749356B2 (en) 2001-03-07 2010-07-06 Kimberly-Clark Worldwide, Inc. Method for using water insoluble chemical additives with pulp and products made by said method
US7670459B2 (en) 2004-12-29 2010-03-02 Kimberly-Clark Worldwide, Inc. Soft and durable tissue products containing a softening agent

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA783483A (en) * 1964-08-13 1968-04-23 Electric Reduction Company Of Canada Processes for bleaching cellulosic pulps
NO141172B (en) * 1970-06-25 Keskuslaboratorio-Centrallaboratorium Ab, Oy, PROCEDURE FOR DYNAMIC FLEACHING OF FIBER PULP
FI67894C (en) * 1982-05-21 1985-06-10 Rauma Repola Oy FOERFARANDE OCH ANORDNING FOER BLEKNING AV FIBERMASSA
FI86895C (en) * 1990-01-11 1997-01-15 Poeyry Jaakko & Co Oy Method for countercurrent washing and bleaching of cellulose boiling pulp

Also Published As

Publication number Publication date
NO913904D0 (en) 1991-10-04
CA2049951A1 (en) 1990-10-08
BR9007276A (en) 1992-03-17
ZA902703B (en) 1994-10-07
JPH05500835A (en) 1993-02-18
AU5420190A (en) 1990-11-05
ATE140282T1 (en) 1996-07-15
FI85513C (en) 1992-04-27
FI891662A0 (en) 1989-04-07
NO176485B (en) 1995-01-02
NO913904L (en) 1991-10-04
AU647020B2 (en) 1994-03-17
ES2091240T3 (en) 1996-11-01
WO1990012146A1 (en) 1990-10-18
EP0466752A1 (en) 1992-01-22
FI85513B (en) 1992-01-15
DE69027770T2 (en) 1996-11-28
FI891662A (en) 1990-10-08
EP0466752B1 (en) 1996-07-10
NO176485C (en) 1995-04-12
DE69027770D1 (en) 1996-08-14

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