CA2053035A1 - Chlorine-Free Wood Pulps and Process of Making - Google Patents

Chlorine-Free Wood Pulps and Process of Making

Info

Publication number
CA2053035A1
CA2053035A1 CA 2053035 CA2053035A CA2053035A1 CA 2053035 A1 CA2053035 A1 CA 2053035A1 CA 2053035 CA2053035 CA 2053035 CA 2053035 A CA2053035 A CA 2053035A CA 2053035 A1 CA2053035 A1 CA 2053035A1
Authority
CA
Canada
Prior art keywords
pulp
bleaching
chlorine based
bleach
chlorine
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2053035
Other languages
French (fr)
Other versions
CA2053035C (en
Inventor
Malcolm Cronlund
Jairo H. Lora
Jeanne L. Powers
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcell Technologies Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2053035A1 publication Critical patent/CA2053035A1/en
Application granted granted Critical
Publication of CA2053035C publication Critical patent/CA2053035C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • D21C9/147—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
    • D21C9/1057—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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds

Landscapes

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

Abstract

This invention provides for a batch and continuous process with countercurrent recycle of bleaching filtrates for the delignification and bleaching of pulp. Oxygen delignification of pulp is achieved in excess of from about 50%
to about 76% as measured by kappa numbers, while the pulp viscosity is minimally decreased in the range of from about 2 to about 5 cps. Bleaching of delignified pulp is achieved with peroxy compounds and ozone and pulp brightness of from about 82 to 88 ISO can be achieved with pulp containing zero level TOX
from chlorine based bleaching chemicals and zero level of AOX
in the bleach effluents. Higher brightness of from about 90 to about 92 ISO can also be achieved by addition of very low levels of chlorine based bleaching chemicals. Corresponding bleach effluents contain less than 200 ppm AOX. Bleaching filtrates can be recycled for pulp washing and for use with an organosolv pulping process which results in significant energy savings and mitigation if not elimination of pollution typically associated with chlorine based bleaching. This invention also relates to bleach pulp product derived from the process and to an apparatus for carrying out the process.
CA 2053035 1990-10-12 1991-10-08 Chlorine-free wood pulps and process of making Expired - Fee Related CA2053035C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US59676590A 1990-10-12 1990-10-12
US596,765 1990-10-12
US77062891A 1991-10-03 1991-10-03
US07/770,628 1991-10-03

Publications (2)

Publication Number Publication Date
CA2053035A1 true CA2053035A1 (en) 1992-04-13
CA2053035C CA2053035C (en) 1997-09-30

Family

ID=27082622

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2053035 Expired - Fee Related CA2053035C (en) 1990-10-12 1991-10-08 Chlorine-free wood pulps and process of making

Country Status (8)

Country Link
EP (1) EP0480469A3 (en)
JP (1) JPH06287881A (en)
AU (2) AU8575691A (en)
BR (1) BR9104455A (en)
CA (1) CA2053035C (en)
FI (1) FI914766A (en)
MX (1) MX9101558A (en)
PT (1) PT99205A (en)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2073027T3 (en) * 1990-05-17 1995-08-01 Union Camp Patent Holding ENVIRONMENTALLY IMPROVED PROCEDURE FOR WHITENING LIGNOCELLULOSIC MATERIALS.
SE512137C2 (en) † 1992-10-29 2000-01-31 Eka Chemicals Ab Process for bleaching lignocellulosic pulp
WO1994012721A1 (en) * 1992-11-27 1994-06-09 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp
US6007678A (en) * 1992-11-27 1999-12-28 Eka Nobel Ab Process for delignification of lignocellulose-containing pulp with an organic peracid or salts thereof
BE1006881A3 (en) * 1993-03-02 1995-01-17 Solvay Interox Method for delignification of chemical pulp.
CA2163389A1 (en) * 1994-11-23 1996-05-24 Malcolm Cronlund Chlorine-free organosolv pulps
AU2400697A (en) * 1996-03-25 1997-10-17 Alcell Technologies Inc. Ozone-bleached organosolv pulps
JP3794254B2 (en) * 2000-02-28 2006-07-05 王子製紙株式会社 Neutral paper
SE532370C2 (en) * 2008-02-28 2009-12-29 Metso Paper Inc Method of bleaching a pulp
US9512237B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Method for inhibiting the growth of microbes with a modified cellulose fiber
KR101739949B1 (en) 2009-05-28 2017-05-25 게페 첼루로제 게엠베하 Modified cellulose from chemical kraft fiber and methods of making and using the same
US9512563B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Surface treated modified cellulose from chemical kraft fiber and methods of making and using same
US9511167B2 (en) 2009-05-28 2016-12-06 Gp Cellulose Gmbh Modified cellulose from chemical kraft fiber and methods of making and using the same
US9551076B2 (en) 2011-05-31 2017-01-24 Clean Chemistry, Inc. Electrochemical reactor and process
EP2892854A4 (en) 2012-09-07 2016-11-02 Clean Chemistry Llc Systems and methods for generation of reactive oxygen species and applications thereof
US10151064B2 (en) * 2013-02-08 2018-12-11 Gp Cellulose Gmbh Softwood kraft fiber having an improved α-cellulose content and its use in the production of chemical cellulose products
MX364379B (en) 2013-03-14 2019-04-24 Gp Cellulose Gmbh A method of making highly functional, low viscosity kraft fiber using an acidic bleaching sequence and a fiber made by the process.
AU2014229512B2 (en) 2013-03-15 2017-06-22 Gp Cellulose Gmbh A low viscosity kraft fiber having an enhanced carboxyl content and methods of making and using the same
FR3007044B1 (en) * 2013-06-13 2016-01-15 Air Liquide PROCESS FOR TREATING CHEMICAL PAPER PASTES BY OZONE TREATMENT IN THE PRESENCE OF MAGNESIUM IONS
AT515152B1 (en) * 2013-11-26 2015-12-15 Chemiefaser Lenzing Ag A process for pretreating recovered cotton fibers for use in the manufacture of regenerated cellulose moldings
WO2016037149A1 (en) 2014-09-04 2016-03-10 Clean Chemistry, Inc. Method of water treatment utilizing a peracetate oxidant solution
US10472265B2 (en) 2015-03-26 2019-11-12 Clean Chemistry, Inc. Systems and methods of reducing a bacteria population in high hydrogen sulfide water
CA3007778C (en) 2015-12-07 2023-09-26 Clean Chemistry, Inc. Methods of microbial control
US10883224B2 (en) 2015-12-07 2021-01-05 Clean Chemistry, Inc. Methods of pulp fiber treatment
US11136714B2 (en) 2016-07-25 2021-10-05 Clean Chemistry, Inc. Methods of optical brightening agent removal
CA3040734A1 (en) 2016-11-16 2018-05-24 Gp Cellulose Gmbh Modified cellulose from chemical fiber and methods of making and using the same
US11311012B1 (en) 2017-09-07 2022-04-26 Clean Chemistry, Inc. Bacterial control in fermentation systems
US11591751B2 (en) * 2019-09-17 2023-02-28 Gpcp Ip Holdings Llc High efficiency fiber bleaching process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219505C3 (en) * 1972-04-21 1974-10-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Chlorine-free multi-stage bleaching of cellulose
SE462919B (en) * 1979-05-11 1990-09-17 Sunds Defibrator Ind Ab PROCEDURE TO PERFORM ALKALIE EXTRACTION OF CELLULOSAMASS IN THE PRESENCE OF ACID
AT373303B (en) * 1981-08-06 1984-01-10 Chemiefaser Lenzing Ag METHOD FOR THE PRODUCTION OF LOW-LEVEL CELLS
US4619733A (en) * 1983-11-30 1986-10-28 Kooi Boon Lam Pollution free pulping process using recycled wash effluent from multiple bleach stages to remove black liquor and recovering sodium hydroxide from the black liquor
ES2041828T3 (en) * 1988-01-25 1993-12-01 Acetocell Gmbh & Co. Kg PROCEDURE FOR THE TREATMENT OF CELLULOSE MASS CONTAINING LIGNIN, WITH OZONE.
AT395028B (en) * 1990-02-07 1992-08-25 Chemiefaser Lenzing Ag METHOD FOR CHLORINE-FREE BLEACHING OF FIBER FIBER

Also Published As

Publication number Publication date
CA2053035C (en) 1997-09-30
PT99205A (en) 1992-09-30
EP0480469A2 (en) 1992-04-15
FI914766A0 (en) 1991-10-09
AU8575691A (en) 1992-04-30
JPH06287881A (en) 1994-10-11
AU1018395A (en) 1995-03-09
BR9104455A (en) 1992-06-09
FI914766A (en) 1992-04-13
MX9101558A (en) 1992-06-05
EP0480469A3 (en) 1994-06-01

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