[go: up one dir, main page]

SE8000250L - REDUCTION OF CHEMICAL TRANSFER BETWEEN TREATMENT STEPS - Google Patents

REDUCTION OF CHEMICAL TRANSFER BETWEEN TREATMENT STEPS

Info

Publication number
SE8000250L
SE8000250L SE8000250A SE8000250A SE8000250L SE 8000250 L SE8000250 L SE 8000250L SE 8000250 A SE8000250 A SE 8000250A SE 8000250 A SE8000250 A SE 8000250A SE 8000250 L SE8000250 L SE 8000250L
Authority
SE
Sweden
Prior art keywords
washer
reduction
pulp
chemical transfer
treatment steps
Prior art date
Application number
SE8000250A
Other languages
Unknown language ( )
Swedish (sv)
Inventor
M D Meredith
Jr L L Edwards
Scotter K T Van
Original Assignee
Weyerhaeuser Co
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 Weyerhaeuser Co filed Critical Weyerhaeuser Co
Publication of SE8000250L publication Critical patent/SE8000250L/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
    • D21C9/02—Washing ; Displacing cooking or pulp-treating liquors contained in the pulp by fluids, e.g. wash water or other pulp-treating agents
    • 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
    • D21C9/1073—Bleaching ; Apparatus therefor with O3

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)

Abstract

12 188 P 52 4678 CANADA REDUCING CHEMICAL TRANSFER BETWEEN TREATMENT STAGES A method and apparatus for reducing or eliminating the transfer of chemicals across a washer when reusing washer filtrate as a washing medium in a counterflow system. The flow of washing fluid on the washers before and after a treatment stage is split and the liquid in the pulp mat leaving the washer is principally the type used to treat the pulp after the washer, and the filtrate from the washer is principally the type used to treat the pulp before the washer.
SE8000250A 1979-01-11 1980-01-11 REDUCTION OF CHEMICAL TRANSFER BETWEEN TREATMENT STEPS SE8000250L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US249279A 1979-01-11 1979-01-11

Publications (1)

Publication Number Publication Date
SE8000250L true SE8000250L (en) 1980-07-12

Family

ID=21701039

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8000250A SE8000250L (en) 1979-01-11 1980-01-11 REDUCTION OF CHEMICAL TRANSFER BETWEEN TREATMENT STEPS

Country Status (8)

Country Link
JP (1) JPS5598991A (en)
AU (1) AU527540B2 (en)
CA (1) CA1123249A (en)
FI (1) FI800080A (en)
FR (1) FR2446354A1 (en)
NO (1) NO800041L (en)
NZ (1) NZ192583A (en)
SE (1) SE8000250L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE426607B (en) * 1982-03-29 1983-01-31 Kamyr Ab WANT TO TREAT A MASS PENSION SUSPENDED ALONG A BORN MIDDLE REPRESENTATION OF THE MASS SUSPENSION FLUID WITH ONE OR MORE REPLACEMENT WETS

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1106842A (en) * 1965-01-25 1968-03-20 Electric Reduction Co Manufacture of cellulosic pulp
ZA761255B (en) * 1975-03-11 1977-03-30 Erco Envirotech Ltd Bleachplant operation
US4104114A (en) * 1977-05-05 1978-08-01 Erco Envirotech Ltd. Bleach plant operation

Also Published As

Publication number Publication date
FR2446354B1 (en) 1984-10-12
FI800080A (en) 1980-07-12
JPS5598991A (en) 1980-07-28
AU527540B2 (en) 1983-03-10
NZ192583A (en) 1983-03-15
CA1123249A (en) 1982-05-11
AU5456980A (en) 1980-07-17
FR2446354A1 (en) 1980-08-08
NO800041L (en) 1980-07-14

Similar Documents

Publication Publication Date Title
EP0901808A3 (en) Process and apparatus for treating exhaust air from thermal drying processes
DE59409931D1 (en) METHOD AND DEVICE FOR THE CHEMICAL TREATMENT OF SUBSTRATES
DE3779435D1 (en) METHOD AND CONTROL SYSTEM FOR MONITORING THE INPUT PERFORMANCE OF LIQUID PUMP OF A HYDRAULIC SYSTEM.
ATE68837T1 (en) METHOD AND DEVICE FOR THE TREATMENT OF FIBER SUSPENSIONS.
DE69502712D1 (en) METHOD AND DEVICE FOR TREATING WASTEWATER CONTAINING ORGANIC SUBSTANCES, IN PARTICULAR THROUGH WET OXYDATION WITH INTERNAL SOLIDS RECOVERY AND WASTEWATER PLANT FOR IMPLEMENTING THE PROCESS.
ATE3185T1 (en) METHOD AND APPARATUS FOR WASHING AND CLEANING MEMBRANE FILTRATION UNITS.
DE69505271D1 (en) METHOD FOR CONVERTING COMPLEX CHEMICAL STRUCTURES UNDER REDUCING CONDITIONS IN A SUPERCRITICAL FLUID
GB1366422A (en) Method and apparatus for cleaning waste liquid containing diluted dye
SE8000250L (en) REDUCTION OF CHEMICAL TRANSFER BETWEEN TREATMENT STEPS
SE9704696D0 (en) Method and apparatus for treating pulp in an indirect heat exchanger in connection with bleaching
GB2018610A (en) Apparatus for the treatment of liquids and method for cleaning a layer of fibres in such an apparatus
DE69700957D1 (en) METHOD FOR IMPLEMENTING A TREATMENT IN THE PRESENCE OF A CENTRIFUGAL FORCE, AND DEVICE THEREFOR
ATE198560T1 (en) METHOD AND DEVICE FOR TREATING SUBSTRATES
FR2041483A5 (en) Treatment of used water
JPS5715889A (en) Purification method for sewage
JPS5230789A (en) Method for washing catalyst and its equipment
JPS5393170A (en) Deodorizing method for exhaust gas or waste liquid
ATE41109T1 (en) APPARATUS AND METHOD FOR TREATMENT OF A LIQUID, ESPECIALLY FOR DEMINERALIZING WATER, FLOATING THROUGH A BED OF GRANULATED, ACTIVE MATERIAL, FORMING A COMPACT RAISED LAYER, AND WHICH IS PERIODICALLY REGENERATED IN A COUNTER-CURRENT.
JPS558818A (en) Washing of precipitated sand in waste water treatment
JPS52156176A (en) Surface washing method of liquid treating membrane
JPS5337576A (en) Treating method for waste fluid from washer by reverse osmosis
JPS5559891A (en) Treating method for organic polluted water by oxidation
JPS51124053A (en) Elimination method of pva contained in exhaust fluid
SOUTHER Water Conservation and Pollution Abatement
GB1343421A (en) Process and apparatus for introducing additives into treatment baths

Legal Events

Date Code Title Description
NAV Patent application has lapsed

Ref document number: 8000250-4

Format of ref document f/p: F