SE9202464D0 - PROCEDURE FOR PROCESSING WATER TREATMENT - Google Patents

PROCEDURE FOR PROCESSING WATER TREATMENT

Info

Publication number
SE9202464D0
SE9202464D0 SE9202464A SE9202464A SE9202464D0 SE 9202464 D0 SE9202464 D0 SE 9202464D0 SE 9202464 A SE9202464 A SE 9202464A SE 9202464 A SE9202464 A SE 9202464A SE 9202464 D0 SE9202464 D0 SE 9202464D0
Authority
SE
Sweden
Prior art keywords
pulp
process water
hydroperoxide
bleaching
ozone
Prior art date
Application number
SE9202464A
Other languages
Swedish (sv)
Other versions
SE9202464L (en
SE500052C2 (en
Original Assignee
Sunds Defibrator Ind 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 Sunds Defibrator Ind Ab filed Critical Sunds Defibrator Ind Ab
Priority to SE9202464A priority Critical patent/SE500052C2/en
Publication of SE9202464D0 publication Critical patent/SE9202464D0/en
Priority to SE9301160A priority patent/SE9301160L/en
Priority to ZA935691A priority patent/ZA935691B/en
Priority to JP6507102A priority patent/JPH08500645A/en
Priority to CA002139566A priority patent/CA2139566A1/en
Priority to ES93919744T priority patent/ES2100563T3/en
Priority to PCT/SE1993/000660 priority patent/WO1994005850A1/en
Priority to BR9306963A priority patent/BR9306963A/en
Priority to DE69309938T priority patent/DE69309938T2/en
Priority to AT93919744T priority patent/ATE151825T1/en
Priority to EP93919744A priority patent/EP0656966B1/en
Priority to AU49879/93A priority patent/AU665461B2/en
Priority to NZ255613A priority patent/NZ255613A/en
Priority to CN93116508A priority patent/CN1089578A/en
Publication of SE9202464L publication Critical patent/SE9202464L/en
Publication of SE500052C2 publication Critical patent/SE500052C2/en
Priority to FI950882A priority patent/FI950882A0/en
Priority to NO950752A priority patent/NO301724B1/en
Priority to US08/779,255 priority patent/US5741398A/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
    • D21C9/1042—Use of chelating 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
    • D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
    • D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

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

Abstract

Treating process water contg. metal ions washed out from pulp of lignocellulose contg. material, prior to bleaching of the pulp with hydroperoxide or ozone, comprises contacting the process water with pulp not intended to be bleached by hydroperoxide or ozone at a pH above 7 at 50-120 deg. C whereby the metal ion content is partially or entirely removed from the process water. - Pref. the process water is brought into contact with pulp at pH 11.0-12.0. The process water is waste water from the washing of pulp after treatment with complex former. The metal ions are sepd. at the washing of the pulp prior to bleaching with hydroperoxide or ozone and are returned entirely or partially to at least a partial flow of the pulp after the bleaching. The pulp used for the sepn. consists of bleached pulp, unbleached pulp or reject pulp.
SE9202464A 1992-08-28 1992-08-28 Treatment of process water to remove metal ions - by bringing the process water into contact with pulp not intended for bleaching by hydroperoxide or ozone SE500052C2 (en)

Priority Applications (17)

Application Number Priority Date Filing Date Title
SE9202464A SE500052C2 (en) 1992-08-28 1992-08-28 Treatment of process water to remove metal ions - by bringing the process water into contact with pulp not intended for bleaching by hydroperoxide or ozone
SE9301160A SE9301160L (en) 1992-08-28 1993-04-07 Process for treating process water
ZA935691A ZA935691B (en) 1992-08-28 1993-08-05 Method of treating process water.
NZ255613A NZ255613A (en) 1992-08-28 1993-08-11 Treating process water to remove metal ions; contacting with lignocellulose pulp which is not to be bleached
DE69309938T DE69309938T2 (en) 1992-08-28 1993-08-11 METHOD FOR TREATING WASTEWATER
EP93919744A EP0656966B1 (en) 1992-08-28 1993-08-11 Method of treating process water
ES93919744T ES2100563T3 (en) 1992-08-28 1993-08-11 METHOD OF TREATING WASTEWATER FROM THE PAPER INDUSTRY.
PCT/SE1993/000660 WO1994005850A1 (en) 1992-08-28 1993-08-11 Method of treating process water
BR9306963A BR9306963A (en) 1992-08-28 1993-08-11 Process water treatment method
JP6507102A JPH08500645A (en) 1992-08-28 1993-08-11 Process water treatment method
AT93919744T ATE151825T1 (en) 1992-08-28 1993-08-11 METHOD FOR TREATING WASTEWATER
CA002139566A CA2139566A1 (en) 1992-08-28 1993-08-11 Method of treating process water
AU49879/93A AU665461B2 (en) 1992-08-28 1993-08-11 Method of treating process water
CN93116508A CN1089578A (en) 1992-08-28 1993-08-19 The method of process for producing water
FI950882A FI950882A0 (en) 1992-08-28 1995-02-27 Method for treating process water
NO950752A NO301724B1 (en) 1992-08-28 1995-02-27 Process water treatment process
US08/779,255 US5741398A (en) 1992-08-28 1997-01-03 Method of removing metal ions dissolved in the bleach plant waste water

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9202464A SE500052C2 (en) 1992-08-28 1992-08-28 Treatment of process water to remove metal ions - by bringing the process water into contact with pulp not intended for bleaching by hydroperoxide or ozone

Publications (3)

Publication Number Publication Date
SE9202464D0 true SE9202464D0 (en) 1992-08-28
SE9202464L SE9202464L (en) 1994-03-01
SE500052C2 SE500052C2 (en) 1994-03-28

Family

ID=20387024

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9202464A SE500052C2 (en) 1992-08-28 1992-08-28 Treatment of process water to remove metal ions - by bringing the process water into contact with pulp not intended for bleaching by hydroperoxide or ozone

Country Status (2)

Country Link
SE (1) SE500052C2 (en)
ZA (1) ZA935691B (en)

Also Published As

Publication number Publication date
SE9202464L (en) 1994-03-01
SE500052C2 (en) 1994-03-28
ZA935691B (en) 1994-03-03

Similar Documents

Publication Publication Date Title
ATE2018T1 (en) PROCESSES FOR DELIGNIFICATION AND BLEACHING OF CHEMICAL AND SEMI-CHEMICAL PULP.
ATE130888T1 (en) METHOD FOR BLEACHING MATERIAL CONTAINING LIGNOCELLULOSE.
NO175948C (en) Method of treating lignocellulosic pulp
FI941764A0 (en) Process for bleaching lignocellulosic pulp
ES2100563T3 (en) METHOD OF TREATING WASTEWATER FROM THE PAPER INDUSTRY.
ES2074670T3 (en) PROCEDURE FOR THE PREPARATION OF HIGH-PERFORMANCE PASTA, BLEACHED.
SE9202464D0 (en) PROCEDURE FOR PROCESSING WATER TREATMENT
SE9301161D0 (en) PROCEDURE FOR PROCESSING WATER TREATMENT
NO302187B1 (en) Method of treating a cellulose pulp
SE9203200L (en) Process for bleaching lignocellulosic pulp
SE9002039D0 (en) SAVE TO PREPARE
NO161663C (en) THREE PROCESSORS TO IMPROVE THREE EFFECT QUALITY.
SU931876A1 (en) Method of treating black liquor of sulphate pulp production
ES2075381T3 (en) RECYCLED WATER TREATMENT PROCEDURE INTENDED TO DILUTE A PAPER PULP.
TH18059EX (en) Method for treating water from the process
RU2118675C1 (en) Method of leafy sulfate cellulose whitening
TH18059A (en) Method for treating water from the process
SE9603630D0 (en) Pulp bleaching process