CA2023904C - Deinking and bleaching secondary fiber - Google Patents

Deinking and bleaching secondary fiber

Info

Publication number
CA2023904C
CA2023904C CA 2023904 CA2023904A CA2023904C CA 2023904 C CA2023904 C CA 2023904C CA 2023904 CA2023904 CA 2023904 CA 2023904 A CA2023904 A CA 2023904A CA 2023904 C CA2023904 C CA 2023904C
Authority
CA
Canada
Prior art keywords
pulp
surfactant
oxygen
deinking
washing
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.)
Expired - Fee Related
Application number
CA 2023904
Other languages
English (en)
French (fr)
Other versions
CA2023904A1 (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
Air Products and Chemicals Inc
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 Air Products and Chemicals Inc filed Critical Air Products and Chemicals Inc
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)
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 1989-10-18

Publications (2)

Publication Number Publication Date
CA2023904A1 CA2023904A1 (en) 1991-04-19
CA2023904C true 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 (ja)
KR (1) KR930010534B1 (ja)
CN (1) CN1051062A (ja)
BR (1) BR9004623A (ja)
CA (1) CA2023904C (ja)
MX (1) MX174304B (ja)
MY (1) MY107045A (ja)
ZA (1) ZA907009B (ja)

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 (zh) * 2020-06-17 2022-07-26 宁波宝新不锈钢有限公司 一种有利于平整延伸率轧出的不锈钢垫纸的制备方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6225796A (ja) * 1985-07-26 1987-02-03 松下電器産業株式会社 音声認識装置

Also Published As

Publication number Publication date
CA2023904A1 (en) 1991-04-19
KR910008224A (ko) 1991-05-30
ZA907009B (en) 1992-05-27
BR9004623A (pt) 1991-09-10
MX174304B (es) 1994-05-04
MY107045A (en) 1995-09-30
KR930010534B1 (ko) 1993-10-25
JPH03137285A (ja) 1991-06-11
CN1051062A (zh) 1991-05-01

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed
MKLA Lapsed

Effective date: 19990823