CA2202714A1 - Process for increasing the degree of whiteness of paper fiber pulp - Google Patents

Process for increasing the degree of whiteness of paper fiber pulp

Info

Publication number
CA2202714A1
CA2202714A1 CA002202714A CA2202714A CA2202714A1 CA 2202714 A1 CA2202714 A1 CA 2202714A1 CA 002202714 A CA002202714 A CA 002202714A CA 2202714 A CA2202714 A CA 2202714A CA 2202714 A1 CA2202714 A1 CA 2202714A1
Authority
CA
Canada
Prior art keywords
bleaching
pulp
suspension
whiteness
increasing
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
CA002202714A
Other languages
French (fr)
Other versions
CA2202714C (en
Inventor
Volker Gehr
Harald Selder
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.)
Voith Paper Fiber and Environmental Solutions GmbH and Co KG
Original Assignee
Voith Sulzer Stoffaufbereitung GmbH
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 Voith Sulzer Stoffaufbereitung GmbH filed Critical Voith Sulzer Stoffaufbereitung GmbH
Publication of CA2202714A1 publication Critical patent/CA2202714A1/en
Application granted granted Critical
Publication of CA2202714C publication Critical patent/CA2202714C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
    • D21B1/00—Fibrous raw materials or their mechanical treatment
    • D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
    • D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
    • D21B1/30—Defibrating by other means
    • D21B1/32—Defibrating by other means of waste paper
    • 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
    • D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
    • D21C5/02—Working-up waste paper
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B41M5/3852—Anthraquinone or naphthoquinone dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B41M5/3854—Dyes containing one or more acyclic carbon-to-carbon double bonds, e.g., di- or tri-cyanovinyl, methine
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B41M5/388—Azo dyes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/382—Contact thermal transfer or sublimation processes
    • B41M5/385—Contact thermal transfer or sublimation processes characterised by the transferable dyes or pigments
    • B41M5/39—Dyes containing one or more carbon-to-nitrogen double bonds, e.g. azomethine
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/64—Paper recycling

Abstract

A process for increasing a degree of whiteness of paper pulp may include bring paper fiber pulp, which may at least partially include printed waste paper, into a suspension with water. The suspension may be mixed with bleaching aids and bleaching chemicals. The bleaching chemicals may preferably contain molecular oxygen.
Intensely mechanically treating the pulp, e.g., at at least 20 kWh/to, prior to bleaching the pulp suspension. The bleaching period may take at least 10 minutes, with a pressure above the atmospheric pressure being exerted during the bleaching. After bleaching, a major portion of remaining color print particles may be removed from the bleached pulp.
CA 2202714 1996-04-16 1997-04-15 Process for increasing the degree of whiteness of paper fiber pulp Expired - Fee Related CA2202714C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19614947.9 1996-04-16
DE1996114947 DE19614947B4 (en) 1996-04-16 1996-04-16 Process for increasing the whiteness of paper pulp

Publications (2)

Publication Number Publication Date
CA2202714A1 true CA2202714A1 (en) 1997-10-16
CA2202714C CA2202714C (en) 2002-06-25

Family

ID=7791398

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2202714 Expired - Fee Related CA2202714C (en) 1996-04-16 1997-04-15 Process for increasing the degree of whiteness of paper fiber pulp

Country Status (4)

Country Link
US (1) US5958179A (en)
EP (1) EP0802275A1 (en)
CA (1) CA2202714C (en)
DE (1) DE19614947B4 (en)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19751173A1 (en) * 1997-11-19 1999-05-27 Voith Sulzer Papiertech Patent Pulp bleaching method especially for recycling used paper materials
KR100288123B1 (en) * 1998-06-27 2001-05-02 김충섭 Recycling Method of Corrugated Cardboard Using Floating and Kneading Treatment
EP1096062B1 (en) * 1999-10-29 2004-02-11 Voith Paper Patent GmbH Process to improve the homogenity and bleaching degree of paper pulp
DE19954246A1 (en) * 1999-10-29 2001-07-26 Voith Paper Patent Gmbh Process for increasing the homogeneity and whiteness of paper pulp
DE19958038A1 (en) * 1999-12-03 2001-06-07 Voith Paper Patent Gmbh Process for increasing the water retention of paper pulp
DE10000181A1 (en) * 2000-01-05 2001-07-12 Voith Paper Patent Gmbh Process for dissolving waste paper
US6458240B1 (en) 2000-01-14 2002-10-01 Georgia-Pacific Corporation Method for removing contaminants from fibers in recycle fiber pulping
DE10121324A1 (en) * 2001-05-02 2002-11-07 Voith Paper Patent Gmbh Process for producing a fiber suspension from paper-containing material
DE10135699A1 (en) * 2001-07-21 2003-02-13 Voith Paper Patent Gmbh Process for processing dry waste
FI112805B (en) * 2001-10-10 2004-01-15 Megatrex Oy Process for removing dyes, especially inks from recycled fiber materials
JP2003119679A (en) * 2001-10-17 2003-04-23 Aikawa Iron Works Co Ltd Apparatus for heating pulp
AT411604B (en) * 2002-03-27 2004-03-25 Andritz Ag Maschf METHOD AND DEVICE FOR DISPERSING A PAPER FIBER FIBER
DE10219844C1 (en) * 2002-05-03 2003-09-18 Voith Paper Patent Gmbh Hot dispersion of a paper fiber suspension, from used recycled paper, has a press to give a high-consistency suspension for heating, with measurements of heating energy consumption to control the press action
US7297225B2 (en) * 2004-06-22 2007-11-20 Georgia-Pacific Consumer Products Lp Process for high temperature peroxide bleaching of pulp with cool discharge
US10895038B2 (en) 2017-05-31 2021-01-19 Gpcp Ip Holdings Llc High consistency re-pulping method, apparatus and absorbent products incorporating recycled fiber
US11591751B2 (en) 2019-09-17 2023-02-28 Gpcp Ip Holdings Llc High efficiency fiber bleaching process
US20220213648A1 (en) 2021-01-06 2022-07-07 Gpcp Ip Holdings Llc Oxygen Treatment of High Kappa Fibers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3610940A1 (en) * 1986-03-04 1987-09-10 Escher Wyss Gmbh HIGH TEMPERATURE HIGH CONSISTENCY FAST WHITE
US5211809A (en) * 1991-05-21 1993-05-18 Air Products And Chemicals, Inc,. Dye removal in oxygen color stripping of secondary fibers
US5518580A (en) * 1991-09-20 1996-05-21 J.M. Voith Gmbh Method of processing printed waste matter
DE4133683A1 (en) * 1991-09-20 1993-03-25 Voith Gmbh J M METHOD FOR PROCESSING PRINTED WASTE PAPER
CA2082557C (en) * 1992-02-24 1997-03-11 Charles W. Hankins Integrated pulping process of waste paper yielding tissue-grade paper fibers
DE4233286A1 (en) * 1992-10-02 1994-04-07 Voith Gmbh J M Process for the treatment of printed waste paper
US6153300A (en) * 1994-04-18 2000-11-28 Ahlstrom Machinery, Inc. Bleaching cellulose pulp having cleanliness which varies significantly over time using at least two different bleaching stages and bleaching chemicals
SE9403494L (en) * 1994-10-13 1996-04-14 Aga Ab Methods and apparatus for bleaching recycled fiber

Also Published As

Publication number Publication date
DE19614947A1 (en) 1997-10-23
DE19614947B4 (en) 2004-04-08
EP0802275A1 (en) 1997-10-22
CA2202714C (en) 2002-06-25
US5958179A (en) 1999-09-28

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed