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SE8700313L - PROCEDURE FOR WHEATING OF MECHANICAL MASSES - Google Patents

PROCEDURE FOR WHEATING OF MECHANICAL MASSES

Info

Publication number
SE8700313L
SE8700313L SE8700313A SE8700313A SE8700313L SE 8700313 L SE8700313 L SE 8700313L SE 8700313 A SE8700313 A SE 8700313A SE 8700313 A SE8700313 A SE 8700313A SE 8700313 L SE8700313 L SE 8700313L
Authority
SE
Sweden
Prior art keywords
wheating
procedure
hydrogen peroxide
mechanical masses
masses
Prior art date
Application number
SE8700313A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE8700313D0 (en
SE467666B (en
Inventor
D Lachenal
Original Assignee
Atochem
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 Atochem filed Critical Atochem
Publication of SE8700313D0 publication Critical patent/SE8700313D0/en
Publication of SE8700313L publication Critical patent/SE8700313L/en
Publication of SE467666B publication Critical patent/SE467666B/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
    • 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
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Landscapes

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

Abstract

Process for bleaching mechanical pulp with the aid of hydrogen peroxide, characterised in that the mechanical pulp is subjected to the action of hydrogen peroxide in an acidic medium in the absence of the complexant, and is then bleached by means of hydrogen peroxide in an alkaline medium, in the presence of at least one stabiliser for hydrogen peroxide.
SE8700313A 1986-01-30 1987-01-27 PROCEDURES FOR WHEATING MECHANICAL MASS WITH WATER PEROXIDE SE467666B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8601465A FR2593527B1 (en) 1986-01-30 1986-01-30 PROCESS FOR BLEACHING MECHANICAL PASTA.

Publications (3)

Publication Number Publication Date
SE8700313D0 SE8700313D0 (en) 1987-01-27
SE8700313L true SE8700313L (en) 1987-07-31
SE467666B SE467666B (en) 1992-08-24

Family

ID=9331755

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8700313A SE467666B (en) 1986-01-30 1987-01-27 PROCEDURES FOR WHEATING MECHANICAL MASS WITH WATER PEROXIDE

Country Status (4)

Country Link
JP (1) JPS62191589A (en)
FI (1) FI87244C (en)
FR (1) FR2593527B1 (en)
SE (1) SE467666B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2622221A1 (en) * 1987-10-22 1989-04-28 Atochem PROCESS FOR BLEACHING PASTA
US6605181B1 (en) * 1993-10-01 2003-08-12 Kvaerner Pulping Aktiebolag Peroxide bleach sequence including an acidic bleach stage and including a wash stage
DE19516151A1 (en) * 1995-05-03 1996-11-07 Sven Siegle Process for the production of a pulp from cellulosic material, the pulp itself and its use

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE420430B (en) * 1978-02-17 1981-10-05 Mo Och Domsjoe Ab PROCEDURE FOR WHEATING AND EXTRACTION OF LIGNOCELLULOSALLY MATERIALS WITH PEROXID CONTAINING BLACKS
US4410397A (en) * 1978-04-07 1983-10-18 International Paper Company Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives
FR2520397A1 (en) * 1982-01-28 1983-07-29 Centre Tech Ind Papier PROCESS FOR TREATING CHEMICAL PAPER PASTES
SE451606B (en) * 1982-09-14 1987-10-19 Sca Development Ab VIEW WHITENING OF HOG REPLACEMENT MASSES AVERAGE PEROXIDES

Also Published As

Publication number Publication date
JPS62191589A (en) 1987-08-21
FI870391L (en) 1987-07-31
SE8700313D0 (en) 1987-01-27
SE467666B (en) 1992-08-24
FI87244C (en) 1992-12-10
FR2593527A1 (en) 1987-07-31
FI87244B (en) 1992-08-31
FI870391A0 (en) 1987-01-29
JPH0156195B2 (en) 1989-11-29
FR2593527B1 (en) 1988-03-25

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