ATE24745T1 - HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP. - Google Patents

HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP.

Info

Publication number
ATE24745T1
ATE24745T1 AT84420167T AT84420167T ATE24745T1 AT E24745 T1 ATE24745 T1 AT E24745T1 AT 84420167 T AT84420167 T AT 84420167T AT 84420167 T AT84420167 T AT 84420167T AT E24745 T1 ATE24745 T1 AT E24745T1
Authority
AT
Austria
Prior art keywords
paper pulp
chemical paper
hypochlorite treatment
hypochlorite
hydrogen peroxide
Prior art date
Application number
AT84420167T
Other languages
German (de)
Inventor
Dominique Lachenal
Choudens Christian De
Luis Soria-Mozzone
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 ATE24745T1 publication Critical patent/ATE24745T1/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
    • D21C9/12—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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Detergent Compositions (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Cosmetics (AREA)

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.
AT84420167T 1983-10-13 1984-10-05 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP. ATE24745T1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8316500A FR2553444B1 (en) 1983-10-13 1983-10-13 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP
EP84420167A EP0140804B1 (en) 1983-10-13 1984-10-05 Hypochlorite treatment of chemical paper pulps

Publications (1)

Publication Number Publication Date
ATE24745T1 true ATE24745T1 (en) 1987-01-15

Family

ID=9293226

Family Applications (1)

Application Number Title Priority Date Filing Date
AT84420167T ATE24745T1 (en) 1983-10-13 1984-10-05 HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP.

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) DE140804T1 (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
EP0140804A1 (en) 1985-05-08
FI75374B (en) 1988-02-29
EP0140804B1 (en) 1987-01-07
JPS6099086A (en) 1985-06-01
FI75374C (en) 1988-06-09
FR2553444A1 (en) 1985-04-19
AU3421184A (en) 1985-04-18
JPS6214678B2 (en) 1987-04-03
AU565124B2 (en) 1987-09-03
FI843975L (en) 1985-04-14
CA1269805A (en) 1990-06-05
DE140804T1 (en) 1985-12-05
DE3461941D1 (en) 1987-02-12
ES8603607A1 (en) 1985-12-16
FI843975A0 (en) 1984-10-10
ES536713A0 (en) 1985-12-16
FR2553444B1 (en) 1986-07-18

Similar Documents

Publication Publication Date Title
SE7902901L (en) OXYGEN LIGNIFIED BLOCK, CELLULOSIZED PULP WITH OZON
FR2457339B1 (en)
ATE48290T1 (en) PROCESSES FOR DELIGNIFICATION AND BLEACHING OF PULP.
DE69301285D1 (en) Process for delignification of chemical pulps
ATE54475T1 (en) PROCESSES FOR BLEACHING AND DELIGNIFICATION OF PULP-CONTAINING PRODUCTS.
KR830007942A (en) Extraction and Bleaching of Woven Fabrics by a Single Process Using a Treatment Solution Containing Hydrogen Peroxide
ATE24745T1 (en) HYPOCHLORITE TREATMENT OF CHEMICAL PAPER PULP.
DE69212051D1 (en) Process for the production of bleached high yield paper pulp
FI884807A7 (en) PEROXIDBLEKNING AV MECHANICAL MASSAGE.
ATE29537T1 (en) PROCESS FOR BLEACHING PAPER PULP USING HYDROGEN PEROXIDE.
ES2038954A6 (en) Bleaching of paper pulp
ATE84582T1 (en) CONTROL OF PEROXIDE BLEACHING OF VARIOUS PAPER FIBERS.
ATE48291T1 (en) PROCESS FOR BLEACHING CHEMICAL WOOD PULP.
ATE183264T1 (en) METHOD FOR BLEACHING PULP WITHOUT USING CHEMICALS CONTAINING CHLORINE
DE69226143D1 (en) Process to improve selectivity in chemical pulp delignification
SE9900425D0 (en) Pulp delignification process
ATE35433T1 (en) METHODS OF PREPARING CHEMICAL WOOD PULP FOR BLEACHING.
SE9303551D0 (en) Ways to treat chemical pulp without the use of chlorine-containing chemicals
SE9002001D0 (en) METHOD FOR SUPPLYING WATER PEROXIDE IN CELLULOSA PENSIONS

Legal Events

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