DE3461941D1 - Hypochlorite treatment of chemical paper pulps - Google Patents

Hypochlorite treatment of chemical paper pulps

Info

Publication number
DE3461941D1
DE3461941D1 DE8484420167T DE3461941T DE3461941D1 DE 3461941 D1 DE3461941 D1 DE 3461941D1 DE 8484420167 T DE8484420167 T DE 8484420167T DE 3461941 T DE3461941 T DE 3461941T DE 3461941 D1 DE3461941 D1 DE 3461941D1
Authority
DE
Germany
Prior art keywords
paper pulps
chemical paper
hypochlorite treatment
hypochlorite
hydrogen peroxide
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.)
Expired
Application number
DE8484420167T
Other languages
German (de)
Inventor
Dominique Lachenal
Choudens Christian De
Luis 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.)
CENTRE TECH IND PAPIER
Arkema France SA
Original Assignee
CENTRE TECH IND PAPIER
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 CENTRE TECH IND PAPIER, Atochem SA filed Critical CENTRE TECH IND PAPIER
Application granted granted Critical
Publication of DE3461941D1 publication Critical patent/DE3461941D1/en
Expired 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.
DE8484420167T 1983-10-13 1984-10-05 Hypochlorite treatment of chemical paper pulps Expired DE3461941D1 (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
DE3461941D1 true DE3461941D1 (en) 1987-02-12

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 After (1)

Application Number Title Priority Date Filing Date
DE198484420167T Pending DE140804T1 (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) ES8603607A1 (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
DE140804T1 (en) 1985-12-05
FR2553444A1 (en) 1985-04-19
JPS6214678B2 (en) 1987-04-03
AU3421184A (en) 1985-04-18
CA1269805A (en) 1990-06-05
FI75374B (en) 1988-02-29
ATE24745T1 (en) 1987-01-15
ES536713A0 (en) 1985-12-16
JPS6099086A (en) 1985-06-01
FI75374C (en) 1988-06-09
FI843975L (en) 1985-04-14
ES8603607A1 (en) 1985-12-16
FI843975A0 (en) 1984-10-10
FR2553444B1 (en) 1986-07-18
AU565124B2 (en) 1987-09-03
EP0140804B1 (en) 1987-01-07
EP0140804A1 (en) 1985-05-08

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Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8339 Ceased/non-payment of the annual fee