CA2023904A1 - Deinking and bleaching secondary fiber - Google Patents

Deinking and bleaching secondary fiber

Info

Publication number
CA2023904A1
CA2023904A1 CA2023904A CA2023904A CA2023904A1 CA 2023904 A1 CA2023904 A1 CA 2023904A1 CA 2023904 A CA2023904 A CA 2023904A CA 2023904 A CA2023904 A CA 2023904A CA 2023904 A1 CA2023904 A1 CA 2023904A1
Authority
CA
Canada
Prior art keywords
deinking
secondary fiber
fiber
bleaching secondary
bleaching
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
CA2023904A
Other languages
French (fr)
Other versions
CA2023904C (en
Inventor
Ronald Charles Naddeo
Augustine Ivanhoe Dalton
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.)
Air Products and Chemicals 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 CA2023904A1 publication Critical patent/CA2023904A1/en
Application granted granted Critical
Publication of CA2023904C publication Critical patent/CA2023904C/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
    • D21C1/00—Pretreatment of the finely-divided materials before digesting
    • D21C1/08—Pretreatment of the finely-divided materials before digesting with oxygen-generating compounds
    • 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

Landscapes

  • Paper (AREA)

Abstract

The brightness and bleachability of recycled secondary fiber is enhanced by subjecting the pulped fiber to washing in aqueous surfactant before and/or after treatment with oxygen-containing gas dispersed in an aqueous alkaline medium.
CA 2023904 1989-10-18 1990-08-23 Deinking and bleaching secondary fiber Expired - Fee Related CA2023904C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US42329889A 1989-10-18 1989-10-18
US423298 1995-04-17

Publications (2)

Publication Number Publication Date
CA2023904A1 true CA2023904A1 (en) 1991-04-19
CA2023904C CA2023904C (en) 1995-11-28

Family

ID=23678370

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2023904 Expired - Fee Related CA2023904C (en) 1989-10-18 1990-08-23 Deinking and bleaching secondary fiber

Country Status (8)

Country Link
JP (1) JPH03137285A (en)
KR (1) KR930010534B1 (en)
CN (1) CN1051062A (en)
BR (1) BR9004623A (en)
CA (1) CA2023904C (en)
MX (1) MX174304B (en)
MY (1) MY107045A (en)
ZA (1) ZA907009B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2082557C (en) 1992-02-24 1997-03-11 Charles W. Hankins Integrated pulping process of waste paper yielding tissue-grade paper fibers
CN111893800B (en) * 2020-06-17 2022-07-26 宁波宝新不锈钢有限公司 Preparation method of stainless steel packing paper beneficial to flattening elongation percentage rolling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225796A (en) * 1985-07-26 1987-02-03 松下電器産業株式会社 Voice recognition equipment

Also Published As

Publication number Publication date
CA2023904C (en) 1995-11-28
MX174304B (en) 1994-05-04
MY107045A (en) 1995-09-30
JPH03137285A (en) 1991-06-11
KR910008224A (en) 1991-05-30
CN1051062A (en) 1991-05-01
BR9004623A (en) 1991-09-10
KR930010534B1 (en) 1993-10-25
ZA907009B (en) 1992-05-27

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19990823