ATE29537T1 - PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE. - Google Patents

PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE.

Info

Publication number
ATE29537T1
ATE29537T1 AT84420215T AT84420215T ATE29537T1 AT E29537 T1 ATE29537 T1 AT E29537T1 AT 84420215 T AT84420215 T AT 84420215T AT 84420215 T AT84420215 T AT 84420215T AT E29537 T1 ATE29537 T1 AT E29537T1
Authority
AT
Austria
Prior art keywords
hydrogen peroxide
weight
alkaline
concentration
paper pulp
Prior art date
Application number
AT84420215T
Other languages
German (de)
Inventor
Bernard Dubreux
Jean-Pierre Schirrmann
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
Application granted granted Critical
Publication of ATE29537T1 publication Critical patent/ATE29537T1/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

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.
AT84420215T 1983-12-29 1984-12-21 PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE. ATE29537T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320990A FR2557605B1 (en) 1983-12-29 1983-12-29 PROCESS FOR BLEACHING PAPER PULP BY HYDROGEN PEROXIDE
EP84420215A EP0148712B1 (en) 1983-12-29 1984-12-21 Process for bleaching paper pulps with hydrogen peroxide

Publications (1)

Publication Number Publication Date
ATE29537T1 true ATE29537T1 (en) 1987-09-15

Family

ID=9295687

Family Applications (1)

Application Number Title Priority Date Filing Date
AT84420215T ATE29537T1 (en) 1983-12-29 1984-12-21 PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE.

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) DE148712T1 (en)
ES (1) ES539151A0 (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
DE69822893D1 (en) * 1998-05-15 2004-05-06 Nat Silicates Partnership Etob PEROXIDES, OXYGEN, AND PEROXIDES / OXYGEN BLEACH OF CELLULAR MATERIALS AND WASTE PAPER FIBERS
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
EP0148712A1 (en) 1985-07-17
FR2557605A1 (en) 1985-07-05
JPS6261716B2 (en) 1987-12-23
AU567787B2 (en) 1987-12-03
DE148712T1 (en) 1986-01-02
CA1262805A (en) 1989-11-14
DE3466024D1 (en) 1987-10-15
AU3724384A (en) 1985-07-04
ES8602173A1 (en) 1985-11-16
JPS60181391A (en) 1985-09-17
EP0148712B1 (en) 1987-09-09
ES539151A0 (en) 1985-11-16
FI845121L (en) 1985-06-30
FI76135C (en) 1992-04-15
FR2557605B1 (en) 1987-12-11
FI76135B (en) 1988-05-31
FI845121A0 (en) 1984-12-27

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Legal Events

Date Code Title Description
UEP Publication of translation of european patent specification
REN Ceased due to non-payment of the annual fee