MX174304B - METHOD FOR FADING AND WHITENING SECONDARY FIBERS - Google Patents

METHOD FOR FADING AND WHITENING SECONDARY FIBERS

Info

Publication number
MX174304B
MX174304B MX2216090A MX2216090A MX174304B MX 174304 B MX174304 B MX 174304B MX 2216090 A MX2216090 A MX 2216090A MX 2216090 A MX2216090 A MX 2216090A MX 174304 B MX174304 B MX 174304B
Authority
MX
Mexico
Prior art keywords
pulp
fiber
whitening
fading
secondary fibers
Prior art date
Application number
MX2216090A
Other languages
Spanish (es)
Inventor
Ronald Charles Naddeo
Agustine Ivanhoe Dalton
Original Assignee
Air Prod & Chem
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 Prod & Chem filed Critical Air Prod & Chem
Publication of MX174304B publication Critical patent/MX174304B/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
    • 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

La presente invención se refiere a un método para desteñir y blanquear fibra secundaria, que incluye las etapas de someter una pulpa consistente de una pasta acuosa,alcalina de dicha fibra a la reacción con un gas que contiene oxígeno, posteriormente lavar la pulpa, de esta forma blanqueada en un baño acuoso que contenga un agente tensoactivo aniónico o no iónico,agregado a la pulpa antes de o durante el lavado,caracterizado en que el surfactante evita el deposito de tinta residual y otros contaminantes en la fibra en dicha pulpa así blanqueada.The present invention relates to a method for bleaching and bleaching secondary fiber, which includes the steps of subjecting a pulp consisting of an aqueous, alkaline pulp of said fiber to the reaction with an oxygen-containing gas, subsequently washing the pulp, in this way bleached form in an aqueous bath containing an anionic or nonionic surfactant, added to the pulp before or during washing, characterized in that the surfactant prevents the deposit of residual ink and other contaminants on the fiber in said pulp thus bleached.

MX2216090A 1989-10-18 1990-08-30 METHOD FOR FADING AND WHITENING SECONDARY FIBERS MX174304B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US42329889A 1989-10-18 1989-10-18

Publications (1)

Publication Number Publication Date
MX174304B true MX174304B (en) 1994-05-04

Family

ID=23678370

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2216090A MX174304B (en) 1989-10-18 1990-08-30 METHOD FOR FADING AND WHITENING SECONDARY FIBERS

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
CA2023904A1 (en) 1991-04-19
KR910008224A (en) 1991-05-30
ZA907009B (en) 1992-05-27
BR9004623A (en) 1991-09-10
MY107045A (en) 1995-09-30
KR930010534B1 (en) 1993-10-25
JPH03137285A (en) 1991-06-11
CA2023904C (en) 1995-11-28
CN1051062A (en) 1991-05-01

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