ZA947488B - Reduction of salt scale precipitation by control of process stream PH and salt concentration - Google Patents

Reduction of salt scale precipitation by control of process stream PH and salt concentration

Info

Publication number
ZA947488B
ZA947488B ZA947488A ZA947488A ZA947488B ZA 947488 B ZA947488 B ZA 947488B ZA 947488 A ZA947488 A ZA 947488A ZA 947488 A ZA947488 A ZA 947488A ZA 947488 B ZA947488 B ZA 947488B
Authority
ZA
South Africa
Prior art keywords
salt
reduction
control
process stream
scale precipitation
Prior art date
Application number
ZA947488A
Other languages
English (en)
Inventor
Thomas P Gandek
James C Joseph
Michael A Pikulin
George Pangalos
Philip E Bowden
Original Assignee
Union Camp Patent Holding
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 Union Camp Patent Holding filed Critical Union Camp Patent Holding
Publication of ZA947488B publication Critical patent/ZA947488B/xx

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
    • D21C9/008—Prevention of corrosion or formation of deposits on pulp-treating equipment
    • 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
    • D21C9/10—Bleaching ; Apparatus therefor
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • 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
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S162/00—Paper making and fiber liberation
    • Y10S162/08—Chlorine-containing liquid regeneration

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
ZA947488A 1993-10-01 1994-09-26 Reduction of salt scale precipitation by control of process stream PH and salt concentration ZA947488B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/130,619 US5554259A (en) 1993-10-01 1993-10-01 Reduction of salt scale precipitation by control of process stream Ph and salt concentration

Publications (1)

Publication Number Publication Date
ZA947488B true ZA947488B (en) 1995-05-15

Family

ID=22445540

Family Applications (1)

Application Number Title Priority Date Filing Date
ZA947488A ZA947488B (en) 1993-10-01 1994-09-26 Reduction of salt scale precipitation by control of process stream PH and salt concentration

Country Status (8)

Country Link
US (2) US5554259A (fi)
EP (1) EP0721525A4 (fi)
AU (1) AU7876194A (fi)
BR (1) BR9407731A (fi)
CA (1) CA2173215A1 (fi)
FI (1) FI961464A (fi)
WO (1) WO1995009944A1 (fi)
ZA (1) ZA947488B (fi)

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SE9301160L (sv) * 1992-08-28 1994-03-01 Sunds Defibrator Ind Ab Förfarande för behandling av processvatten
SE9501623L (sv) * 1995-05-02 1996-11-03 Sunds Defibrator Ind Ab Blekning av massa
SE9503004L (sv) * 1995-08-30 1997-03-01 Sunds Defibrator Ind Ab Blekning av massa
US5728264A (en) * 1995-10-25 1998-03-17 Union Camp Patent Holding, Inc. Avoidance of salt scaling by acidic pulp washing process
SE9603029D0 (sv) * 1996-08-20 1996-08-20 Svenska Traeforskningsinst Method for lowering the level of oxalic acid
SE509444C2 (sv) * 1997-05-14 1999-01-25 Mo Och Domsjoe Ab Förfarande för minimering av kalcium orsakat inkrustproblem vid framställning av blekt cellulosamassa
SE511794C2 (sv) * 1997-06-30 1999-11-29 Sunds Defibrator Ind Ab Sätt att reducera halten kalcium i vätskefasen i en pappersmassasuspension
US6315863B1 (en) 1998-06-18 2001-11-13 Weyerhaeuser Company Chlorine dioxide pulp bleaching process having reduced barium scaling by recycling post-chlorination waste filtrate
US20040200589A1 (en) * 2003-04-08 2004-10-14 Herring William J. Method of making pulp having high hemicellulose content
US20040200587A1 (en) * 2003-04-08 2004-10-14 Herring William J. Cellulose pulp having increased hemicellulose content
CN103790060A (zh) * 2012-10-31 2014-05-14 陈根长 聚集态改性制浆新工艺的磨浆、漂白技术

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Also Published As

Publication number Publication date
FI961464A (fi) 1996-05-29
AU7876194A (en) 1995-05-01
WO1995009944A1 (en) 1995-04-13
US5693184A (en) 1997-12-02
EP0721525A4 (en) 1997-05-28
BR9407731A (pt) 1997-02-12
US5554259A (en) 1996-09-10
EP0721525A1 (en) 1996-07-17
FI961464A0 (fi) 1996-04-01
CA2173215A1 (en) 1995-04-13

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