ES2119234T3 - PROCEDURE FOR THE WHITENING OF A CHEMICAL PAPER MILL. - Google Patents

PROCEDURE FOR THE WHITENING OF A CHEMICAL PAPER MILL.

Info

Publication number
ES2119234T3
ES2119234T3 ES94931026T ES94931026T ES2119234T3 ES 2119234 T3 ES2119234 T3 ES 2119234T3 ES 94931026 T ES94931026 T ES 94931026T ES 94931026 T ES94931026 T ES 94931026T ES 2119234 T3 ES2119234 T3 ES 2119234T3
Authority
ES
Spain
Prior art keywords
whitening
procedure
paper mill
chemical paper
chemical
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 - Lifetime
Application number
ES94931026T
Other languages
Spanish (es)
Inventor
Francois Desprez
Nicholas A Troughton
Johan Devenyns
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.)
SOLVAY INTEROX
Solvay Chimie SA
Original Assignee
SOLVAY INTEROX
Solvay Interox 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=3887524&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=ES2119234(T3) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by SOLVAY INTEROX, Solvay Interox SA filed Critical SOLVAY INTEROX
Application granted granted Critical
Publication of ES2119234T3 publication Critical patent/ES2119234T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
    • 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1042—Use of chelating agents
    • 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

Process for bleaching a chemical pulp through a sequence of processing steps comprising, in this order, a step for decontaminating the pulp by removing its transition metals, an alcaline hydrogen peroxide processing step and a processing step using a non peroxygenated acid.
ES94931026T 1993-11-04 1994-10-28 PROCEDURE FOR THE WHITENING OF A CHEMICAL PAPER MILL. Expired - Lifetime ES2119234T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE9301215A BE1007700A3 (en) 1993-11-04 1993-11-04 Method of laundering of chemical pulp.

Publications (1)

Publication Number Publication Date
ES2119234T3 true ES2119234T3 (en) 1998-10-01

Family

ID=3887524

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94931026T Expired - Lifetime ES2119234T3 (en) 1993-11-04 1994-10-28 PROCEDURE FOR THE WHITENING OF A CHEMICAL PAPER MILL.

Country Status (15)

Country Link
EP (1) EP0726979B1 (en)
JP (1) JPH09507096A (en)
AT (1) ATE166118T1 (en)
AU (1) AU7994094A (en)
BE (1) BE1007700A3 (en)
BR (1) BR9407976A (en)
CA (1) CA2175817A1 (en)
DE (1) DE69410286T2 (en)
ES (1) ES2119234T3 (en)
FI (1) FI961895A (en)
MA (1) MA23365A1 (en)
NO (1) NO961817L (en)
NZ (1) NZ274852A (en)
WO (1) WO1995012709A1 (en)
ZA (1) ZA948562B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1007757A3 (en) * 1993-11-10 1995-10-17 Solvay Interox Method of laundering of chemical pulp.
FI105701B (en) * 1995-10-20 2000-09-29 Ahlstrom Machinery Oy Method and arrangement for treatment of pulp

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2582692B1 (en) * 1985-05-29 1987-12-11 Atochem TREATMENT OF CHEMICAL PAPER PULP WITH HYDROGEN PEROXIDE FOR BLEACHING
ATE97179T1 (en) * 1989-06-06 1993-11-15 Eka Nobel Ab PROCESS FOR BLEACHING LIGNOCELLULOSE CONTAINING PULP.
FR2655668B1 (en) * 1989-12-11 1995-06-09 Du Pin Cellulose PROCESS FOR BLEACHING CHEMICAL CELLULOSIC PASTA.

Also Published As

Publication number Publication date
FI961895A0 (en) 1996-05-03
AU7994094A (en) 1995-05-23
JPH09507096A (en) 1997-07-15
DE69410286T2 (en) 1998-12-10
EP0726979A1 (en) 1996-08-21
NO961817D0 (en) 1996-05-03
DE69410286D1 (en) 1998-06-18
ATE166118T1 (en) 1998-05-15
WO1995012709A1 (en) 1995-05-11
NZ274852A (en) 1997-04-24
BE1007700A3 (en) 1995-10-03
MA23365A1 (en) 1995-07-01
EP0726979B1 (en) 1998-05-13
FI961895A (en) 1996-05-03
ZA948562B (en) 1995-06-30
CA2175817A1 (en) 1995-05-11
NO961817L (en) 1996-05-03
BR9407976A (en) 1996-12-03

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