DE148712T1 - METHOD FOR BLEACHING PAPER PULP BY MEANS OF HYDROGEN PEROXIDE. - Google Patents

METHOD FOR BLEACHING PAPER PULP BY MEANS OF HYDROGEN PEROXIDE.

Info

Publication number
DE148712T1
DE148712T1 DE198484420215T DE84420215T DE148712T1 DE 148712 T1 DE148712 T1 DE 148712T1 DE 198484420215 T DE198484420215 T DE 198484420215T DE 84420215 T DE84420215 T DE 84420215T DE 148712 T1 DE148712 T1 DE 148712T1
Authority
DE
Germany
Prior art keywords
hydrogen peroxide
concentration
alkaline
weight
magnesium
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.)
Pending
Application number
DE198484420215T
Other languages
German (de)
Inventor
Bernard F-69340 Francheville-Le-Bas Dubreux
Jean-Pierre F-69600 Oullins Schirrmann
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.)
Arkema France SA
Original Assignee
Atochem SA
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 SA filed Critical Atochem SA
Publication of DE148712T1 publication Critical patent/DE148712T1/en
Pending 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
    • 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.

Claims (5)

0U8712 84 420 215.0 Ansprüche0U8712 84 420 215.0 Claims 1. Verfahren zum Bleichen von chemischen Papierraassen mit Wasserstoffperoxid, dadurch gekennzeichnet, daß der Arbeitsgang in einer einzigen Stufe bei einem pH-Wert von 11 bis 11,5 und einer Temperatur von 700C bis 1000C mittels einer Lösung durchgeführt wird, die außer Wasserstoffperoxid mindestens ein alkalisches Mittel enthalten, ausgewählt unter dem Natriumhydroxid und dem Natriumcarbonat, >,1. A method for bleaching chemical paper races with hydrogen peroxide, characterized in that the operation is carried out in a single stage at a pH of 11 to 11.5 and a temperature of 70 0 C to 100 0 C by means of a solution which in addition to hydrogen peroxide, contain at least one alkaline agent selected from sodium hydroxide and sodium carbonate,>, mindestens ein Alkalisilikat mit einer Konzentra- ίat least one alkali silicate with a concentration ί tion von mindestens 0,3 Gew% Si0_, mindestens ein Magnesiumsalz und mindestens ein Calciumsalz in einer derartigen Menge enthält, daß die Konzentration von jedem der Erdalkaliemente zwischen 0,05 und 1 Gew% beträgt, die in gelöstem Zustand gehalten werden mit Hilfe von wenigstens einem Mittel, das Komplexe mit Erdalkaliionen bildet, in einer derartigen Menge, daß die Gesamtkonzentration an Komplexierungsmittel höchstens 10 Gew% beträgt.tion of at least 0.3 wt% Si0_, at least one magnesium salt and at least one calcium salt in in an amount such that the concentration of each of the alkaline earth elements is between 0.05 and 1 wt%, which are kept in the dissolved state with the aid of at least one Agent which forms complexes with alkaline earth metal ions in such an amount that the total concentration of complexing agent is at most 10% by weight. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Alkalisilikat Natriumsilikat ist.2. The method according to claim 1, characterized in that the alkali silicate is sodium silicate. 3. Verfahren nach Anspruch 1 oder 2, dadurch gekenn-5 zeichnet, daß die Anionen der Magnesium- und Calciumsalze gegenüber Wasserstoffperoxid inert sind.3. The method according to claim 1 or 2, characterized in that the anions of the magnesium and Calcium salts are inert to hydrogen peroxide are. 1010 1515th 2020th 2525th 0Η87120Η8712 - 2 - 84 420 215.0- 2 - 84 420 215.0 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Magnesiumsalz Magnesiumchlorid ist.4. The method according to any one of claims 1 to 3, characterized characterized in that the magnesium salt is magnesium chloride. 5. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß das Calciumsalz Calciumchlorid ist.5. The method according to any one of claims 1 to 3, characterized in that the calcium salt Calcium chloride is. 3030th
DE198484420215T 1983-12-29 1984-12-21 METHOD FOR BLEACHING PAPER PULP BY MEANS OF HYDROGEN PEROXIDE. Pending DE148712T1 (en)

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
DE148712T1 true DE148712T1 (en) 1986-01-02

Family

ID=9295687

Family Applications (2)

Application Number Title Priority Date Filing Date
DE198484420215T Pending DE148712T1 (en) 1983-12-29 1984-12-21 METHOD FOR BLEACHING PAPER PULP BY MEANS OF HYDROGEN PEROXIDE.
DE8484420215T Expired DE3466024D1 (en) 1983-12-29 1984-12-21 Process for bleaching paper pulps with hydrogen peroxide

Family Applications After (1)

Application Number Title Priority Date Filing Date
DE8484420215T Expired DE3466024D1 (en) 1983-12-29 1984-12-21 Process for bleaching paper pulps with 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) 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 1996-01-15 Eka Nobel Ab Treatment of chemical pulp with an acid and then a magnesium and calcium compound in chlorine-free bleaching
ATE184060T1 (en) * 1993-04-20 1999-09-15 Eka Chemicals Ab METHOD FOR BLEACHING PULP CONTAINING LIGNOCELLULOSE
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
ATE263268T1 (en) * 1998-05-15 2004-04-15 Nat Silicates Partnership PEROXIDES, OXYGEN, AND PEROXIDES/OXYGEN BLEACHING OF PULP 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
JPS60181391A (en) 1985-09-17
FR2557605B1 (en) 1987-12-11
FI76135B (en) 1988-05-31
EP0148712A1 (en) 1985-07-17
AU3724384A (en) 1985-07-04
FR2557605A1 (en) 1985-07-05
ES539151A0 (en) 1985-11-16
AU567787B2 (en) 1987-12-03
JPS6261716B2 (en) 1987-12-23
EP0148712B1 (en) 1987-09-09
DE3466024D1 (en) 1987-10-15
ES8602173A1 (en) 1985-11-16
FI845121A0 (en) 1984-12-27
CA1262805A (en) 1989-11-14
ATE29537T1 (en) 1987-09-15
FI76135C (en) 1992-04-15
FI845121L (en) 1985-06-30

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