MX9602927A - Process for bleaching kraft pulp. - Google Patents

Process for bleaching kraft pulp.

Info

Publication number
MX9602927A
MX9602927A MX9602927A MX9602927A MX9602927A MX 9602927 A MX9602927 A MX 9602927A MX 9602927 A MX9602927 A MX 9602927A MX 9602927 A MX9602927 A MX 9602927A MX 9602927 A MX9602927 A MX 9602927A
Authority
MX
Mexico
Prior art keywords
kraft pulp
bleaching kraft
pulp
bleaching
agent
Prior art date
Application number
MX9602927A
Other languages
Spanish (es)
Other versions
MXPA96002927A (en
Inventor
Jeffrey Nye
Original Assignee
Hoechst Celanese Corp
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 Hoechst Celanese Corp filed Critical Hoechst Celanese Corp
Publication of MXPA96002927A publication Critical patent/MXPA96002927A/en
Publication of MX9602927A publication Critical patent/MX9602927A/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
    • D21C9/1084—Bleaching ; Apparatus therefor with reducing compounds
    • 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16

Abstract

A method for bleaching lignocellulose containing pulp which has been chemically pulped is described wherein the method comprises the steps of sequentially treating the pulp with a reducing agent, a chelating agent and an oxidative agent.
MX9602927A 1995-07-20 1996-07-22 Process for bleaching kraft pulp. MX9602927A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/504,818 USH1690H (en) 1995-07-20 1995-07-20 Process for bleaching kraft pulp
US08504818 1995-07-20

Publications (2)

Publication Number Publication Date
MXPA96002927A MXPA96002927A (en) 1998-04-01
MX9602927A true MX9602927A (en) 1998-04-30

Family

ID=24007874

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9602927A MX9602927A (en) 1995-07-20 1996-07-22 Process for bleaching kraft pulp.

Country Status (3)

Country Link
US (1) USH1690H (en)
CA (1) CA2181523A1 (en)
MX (1) MX9602927A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2285823C (en) * 1998-10-28 2007-07-10 Pulp And Paper Research Institute Of Canada A method for reducing alkaline darkening of mechanical pulp containing a calcium carbonate filler
US6881299B2 (en) * 2001-05-16 2005-04-19 North American Paper Corporation Refiner bleaching with magnesium oxide and hydrogen peroxide
US6743332B2 (en) * 2001-05-16 2004-06-01 Weyerhaeuser Company High temperature peroxide bleaching of mechanical pulps
DE10320618A1 (en) * 2003-05-08 2004-11-18 Papierfabrik Albbruck Gmbh & Co. Kg Process for bleaching fibrous materials
WO2009154898A1 (en) 2008-06-20 2009-12-23 International Paper Company Composition and recording sheet with improved optical properties
US9932709B2 (en) 2013-03-15 2018-04-03 Ecolab Usa Inc. Processes and compositions for brightness improvement in paper production
US8980051B2 (en) * 2009-04-24 2015-03-17 International Paper Company Sulfonation of pulp produced by alkali pulping process

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1154205A (en) * 1980-04-15 1983-09-27 Madhu P. Godsay Brightness improvement of ozone bleached pulps
US4578149A (en) * 1981-03-05 1986-03-25 Fagerlund Bertil K E Process for digesting cellulosic material with heat recovery
CA1249402A (en) * 1984-12-21 1989-01-31 Pulp And Paper Research Institute Of Canada Multistage brightening of high yield and ultra high- yield wood pulps
CA1340348C (en) * 1989-03-23 1999-01-26 Michel Barbe Bleaching process for the production of high bright pulps
BE1004630A3 (en) * 1990-10-17 1992-12-22 Interox Internat Sa Method for preservation of strength characteristics of paper pulp chemicals.
ES2101830T3 (en) * 1990-10-24 1997-07-16 Beloit Technologies Inc PULP REDUCTION PROCESS IN PAPER MANUFACTURING.
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
AU671337B2 (en) * 1992-11-27 1996-08-22 Eka Nobel Ab Process for bleaching of lignocellulose-containing pulp
PL309191A1 (en) * 1992-11-27 1995-09-18 Eka Nobel Ab Method delignifying a lignocellulose containing pulp
DE4301802A1 (en) * 1993-01-23 1994-07-28 Basf Ag Process for increasing the whiteness of cellulose bleached without chlorine

Also Published As

Publication number Publication date
USH1690H (en) 1997-11-04
CA2181523A1 (en) 1997-01-21

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