FI845121A0 - FOERFARANDE FOER BLEKNING AV PAPPERSMASSOR MED VAETEPEROXID. - Google Patents

FOERFARANDE FOER BLEKNING AV PAPPERSMASSOR MED VAETEPEROXID.

Info

Publication number
FI845121A0
FI845121A0 FI845121A FI845121A FI845121A0 FI 845121 A0 FI845121 A0 FI 845121A0 FI 845121 A FI845121 A FI 845121A FI 845121 A FI845121 A FI 845121A FI 845121 A0 FI845121 A0 FI 845121A0
Authority
FI
Finland
Prior art keywords
weight
alkaline
vaeteperoxid
pappersmassor
med
Prior art date
Application number
FI845121A
Other languages
Finnish (fi)
Other versions
FI76135C (en
FI76135B (en
FI845121L (en
Inventor
Bernard Dubreux
Jean-Pierre Schirmann
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 FI845121A0 publication Critical patent/FI845121A0/en
Publication of FI845121L publication Critical patent/FI845121L/en
Application granted granted Critical
Publication of FI76135B publication Critical patent/FI76135B/en
Publication of FI76135C publication Critical patent/FI76135C/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)
  • Detergent Compositions (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Load-Bearing And Curtain Walls (AREA)

Abstract

1. Process for bleaching chemical paper pulps using hydrogen peroxide, characterized in that the operation is carried out in a single stage at a pH of 11 to 11.5, at a temperature of 70 degrees C to 100 degrees C, with the aid of a solution containing, in addition to hydrogen peroxide, at least one alkaline agent chosen from sodium hydroxide and sodium carbonate, at least one alkali metal silicate at a concentration of at least 0.3% by weight, expressed as SiO2 , at least one magnesium salt and at least one calcium salt in such quantity that the weight concentration of each of these alkaline-earth elements is between 0.05% and 1%, these elements being maintained in the dissolved state with the aid of at least one complexing agent for alkaline-earth ions in such quantity that the total concentration of complexant does not exceed 10% by weight.
FI845121A 1983-12-29 1984-12-27 FOERFARANDE FOER BLEKNING AV PAPPERSMASSOR MED VAETEPEROXID. FI76135C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320990 1983-12-29
FR8320990A FR2557605B1 (en) 1983-12-29 1983-12-29 PROCESS FOR BLEACHING PAPER PULP BY HYDROGEN PEROXIDE

Publications (4)

Publication Number Publication Date
FI845121A0 true FI845121A0 (en) 1984-12-27
FI845121L FI845121L (en) 1985-06-30
FI76135B FI76135B (en) 1988-05-31
FI76135C FI76135C (en) 1992-04-15

Family

ID=9295687

Family Applications (1)

Application Number Title Priority Date Filing Date
FI845121A FI76135C (en) 1983-12-29 1984-12-27 FOERFARANDE FOER BLEKNING AV PAPPERSMASSOR MED VAETEPEROXID.

Country Status (9)

Country Link
EP (1) EP0148712B1 (en)
JP (1) JPS60181391A (en)
AT (1) ATE29537T1 (en)
AU (1) AU567787B2 (en)
CA (1) CA1262805A (en)
DE (2) DE3466024D1 (en)
ES (1) ES8602173A1 (en)
FI (1) FI76135C (en)
FR (1) FR2557605B1 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3544398A1 (en) * 1985-12-16 1987-06-19 Sueddeutsche Kalkstickstoff METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS
JPH0642046B2 (en) * 1987-01-29 1994-06-01 新王子製紙株式会社 Support for photographic paper
SE470065C (en) * 1991-04-30 1995-10-12 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching
DE69420306T2 (en) * 1993-04-20 2000-04-20 Eka Chemicals Ab Bohus Process for bleaching lignocellulosic pulp
IT1290070B1 (en) * 1997-03-13 1998-10-19 3V Sigma Spa COMPOSITIONS FOR THE PAPER WHITENING
GB2327894A (en) * 1997-08-01 1999-02-10 Nippon Paint Co Ltd Method of multi-layer coating formation
US6699358B1 (en) 1998-05-15 2004-03-02 National Silicates Partnership Method for brightening chemical pulp with hydrogen peroxide using a magnesium compound in silicate solution
EP1088130B1 (en) * 1998-05-15 2004-03-31 National Silicates Partnership Peroxide, oxygen, and peroxide/oxygen brightening of chemical and mixed waste pulps
US7001484B2 (en) 2000-05-04 2006-02-21 University Of New Brunswick Peroxide bleaching of wood pulp using stabilizers and sodium hydrosulfide reducing agent
US8845860B2 (en) 2010-09-16 2014-09-30 Georgia-Pacific Consumer Products Lp High brightness pulps from lignin rich waste papers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US437813A (en) * 1890-10-07 Envelope-machine
NL97796C (en) * 1958-05-29
US3472813A (en) * 1967-01-18 1969-10-14 Argus Chem Resistance of acrylonitrile butadiene styrene polymers to discoloration
FR2038056A1 (en) * 1969-03-07 1971-01-08 Air Liquide Stable, clear bleaching bath for paper - pulp
SE7510015L (en) * 1975-09-09 1977-03-10 Dev Ab Sca WAY TO TREAT LIGNOCELLULOSIS-CONTAINING MATERIAL
JPS583074B2 (en) * 1975-11-17 1983-01-19 三菱瓦斯化学株式会社 Palpuno Kasan Kabutsu Hiyou Hakuhou
JPS5927436B2 (en) * 1979-05-29 1984-07-05 王子製紙株式会社 Peroxide bleaching method for wood pulp
FR2476684A1 (en) * 1980-02-21 1981-08-28 Interox PROCESS FOR INHIBITING CORROSION OF TITANIUM APPLIANCES

Also Published As

Publication number Publication date
FI76135C (en) 1992-04-15
JPS60181391A (en) 1985-09-17
ES539151A0 (en) 1985-11-16
FR2557605A1 (en) 1985-07-05
FR2557605B1 (en) 1987-12-11
EP0148712B1 (en) 1987-09-09
AU3724384A (en) 1985-07-04
DE3466024D1 (en) 1987-10-15
EP0148712A1 (en) 1985-07-17
FI76135B (en) 1988-05-31
ATE29537T1 (en) 1987-09-15
JPS6261716B2 (en) 1987-12-23
ES8602173A1 (en) 1985-11-16
AU567787B2 (en) 1987-12-03
DE148712T1 (en) 1986-01-02
CA1262805A (en) 1989-11-14
FI845121L (en) 1985-06-30

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Legal Events

Date Code Title Description
MM Patent lapsed

Owner name: ATOCHEM