DE140804T1 - HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS. - Google Patents

HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS.

Info

Publication number
DE140804T1
DE140804T1 DE198484420167T DE84420167T DE140804T1 DE 140804 T1 DE140804 T1 DE 140804T1 DE 198484420167 T DE198484420167 T DE 198484420167T DE 84420167 T DE84420167 T DE 84420167T DE 140804 T1 DE140804 T1 DE 140804T1
Authority
DE
Germany
Prior art keywords
hypochlorite
hydrogen peroxide
added
weight
chemical paper
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
DE198484420167T
Other languages
German (de)
Inventor
Christian F-386610 Gieres De Choudens
Dominique F-38130 Echirolles Lachenal
Luis Departement Forestier Avenida Garzon 780 Soria-Mozzone
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 DE140804T1 publication Critical patent/DE140804T1/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
    • D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
    • D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
    • D21C9/144—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites with ClO2/Cl2 and other bleaching agents in a multistage process

Abstract

1. Process for bleaching chemical paper pulps by means of an alkaline hypochlorite solution and then hydrogen peroxide, without intermediate washing of the treated pulp, characterized in that the hydrogen peroxide is added when 85% to 95% of the hypochlorite is consumed.

Claims (6)

0U0804 84 420 167.3 Ansprüche0U0804 84 420 167.3 claims 1. Verfahren zum Bleichen von chemischen Papierinassen mit einer alkalischen Hypochloritlösung und anschließend mit Wasserstoffperoxid, dadurch gekennzeichnet, daß das Wasserstoffper-1. Process for bleaching chemical paper inlays with an alkaline hypochlorite solution and then with hydrogen peroxide, thereby characterized that the hydrogen per- r> oxid ohne Vorwaschen dor behandelten Masse zugesetzt wird, wenn 85 % bis 95 % des Hypochlorits verbraucht sind. r > oxide is added to the treated mass without pre-washing when 85% to 95% of the hypochlorite has been consumed. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Wasserstoffperoxid in einer Menge von 0,1 bis 2 Gewichtsprozent, bezogen auf das Gewicht der Papiermasse, zugesetzt wird.2. The method according to claim 1, characterized in that the hydrogen peroxide in an amount from 0.1 to 2 percent by weight, based on the weight of the paper pulp, is added. 3. Verfahren nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, daß die Zugabe des Wasserstoffperoxidserfolgt, ohne daß die Behänd lungsiemperatur geändert wird.3. The method according to any one of claims 1 or 2, characterized in that the addition of the Hydrogen peroxide takes place without the handling temperature is changed. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß dem Wasserstoffperoxid Natriumhydroxid zugesetzt wird.4. The method according to any one of claims 1 to 3, characterized in that the hydrogen peroxide Sodium hydroxide is added. 5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Menge des zugesetzten Natrium-5 hydroxids unter 2 Gewichtsprozent, bezogen auf das Gewicht der Papiermasse, liegt.5. The method according to claim 4, characterized in that that the amount of sodium hydroxide added is less than 2 percent by weight on the weight of the paper pulp. _ 2 —_ 2 - 84 420 167.384 420 167.3 6. Verfahren nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß das Hypochlorit Natriumhypochlorit oder Kalziumhypochlorit ist.6. The method according to any one of claims 1 to 5, characterized in that the hypochlorite Is sodium hypochlorite or calcium hypochlorite.
DE198484420167T 1983-10-13 1984-10-05 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS. Pending DE140804T1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8316500A FR2553444B1 (en) 1983-10-13 1983-10-13 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP

Publications (1)

Publication Number Publication Date
DE140804T1 true DE140804T1 (en) 1985-12-05

Family

ID=9293226

Family Applications (2)

Application Number Title Priority Date Filing Date
DE8484420167T Expired DE3461941D1 (en) 1983-10-13 1984-10-05 Hypochlorite treatment of chemical paper pulps
DE198484420167T Pending DE140804T1 (en) 1983-10-13 1984-10-05 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULPS.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE8484420167T Expired DE3461941D1 (en) 1983-10-13 1984-10-05 Hypochlorite treatment of chemical paper pulps

Country Status (9)

Country Link
EP (1) EP0140804B1 (en)
JP (1) JPS6099086A (en)
AT (1) ATE24745T1 (en)
AU (1) AU565124B2 (en)
CA (1) CA1269805A (en)
DE (2) DE3461941D1 (en)
ES (1) ES536713A0 (en)
FI (1) FI75374C (en)
FR (1) FR2553444B1 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ229702A (en) * 1989-06-23 1993-03-26 Nz Forest Products Ltd Formerl Bleaching chemical pulp including an activation step followed by an alkaline extraction step with no intervening washing step
AU6485598A (en) * 1996-12-11 1998-07-03 Akio Mita Method for storing and transporting cellulosic and process for manufacturing pulp
CN100500990C (en) * 2005-09-02 2009-06-17 华南理工大学 Paper pulp cleaning and bleaching process
JP4968638B2 (en) * 2005-11-15 2012-07-04 好高 青山 Shaft-shaped parts supply device
JP4941726B2 (en) * 2007-01-12 2012-05-30 沖縄県 Method for bleaching discolored wood
JP4943908B2 (en) * 2007-03-26 2012-05-30 陽一 松本 Method for producing kakkon fiber and kuzu fiber obtained by the method
JP2008264866A (en) * 2007-04-20 2008-11-06 Yoshitaka Aoyama Apparatus and method of controlling operation of electrode in electric resistance welding

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE736070C (en) * 1938-07-01 1943-06-07 Degussa Process for treating pulp
US2527563A (en) * 1947-08-13 1950-10-31 Buffalo Electro Chem Co Method of bleaching semichemical pulps
US2661261A (en) * 1950-06-30 1953-12-01 Buffalo Electro Chem Co Method of superbleaching chemical pulp
US2865701A (en) * 1953-12-07 1958-12-23 Nat Distillers Chem Corp Process of bleaching kraft pulp with alkaline hypochlorite bleach acidifying the pulp containing residual chlorine and then bleaching with alkaline peroxide
US2920011A (en) * 1955-03-18 1960-01-05 Waldorf Paper Prod Co Elevated temperature and pressure two stage hypochlorite peroxide pulp bleaching process

Also Published As

Publication number Publication date
ES8603607A1 (en) 1985-12-16
ATE24745T1 (en) 1987-01-15
ES536713A0 (en) 1985-12-16
JPS6214678B2 (en) 1987-04-03
FR2553444B1 (en) 1986-07-18
JPS6099086A (en) 1985-06-01
FI843975A0 (en) 1984-10-10
EP0140804B1 (en) 1987-01-07
AU565124B2 (en) 1987-09-03
FI843975L (en) 1985-04-14
DE3461941D1 (en) 1987-02-12
FI75374B (en) 1988-02-29
CA1269805A (en) 1990-06-05
FR2553444A1 (en) 1985-04-19
FI75374C (en) 1988-06-09
AU3421184A (en) 1985-04-18
EP0140804A1 (en) 1985-05-08

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