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MX9307413A - PROCESS FOR WHITENING PULP CONTAINING LIGNOCELLULOSE. - Google Patents

PROCESS FOR WHITENING PULP CONTAINING LIGNOCELLULOSE.

Info

Publication number
MX9307413A
MX9307413A MX9307413A MX9307413A MX9307413A MX 9307413 A MX9307413 A MX 9307413A MX 9307413 A MX9307413 A MX 9307413A MX 9307413 A MX9307413 A MX 9307413A MX 9307413 A MX9307413 A MX 9307413A
Authority
MX
Mexico
Prior art keywords
degrees celsius
approximately
bleaching
pulp containing
pulp
Prior art date
Application number
MX9307413A
Other languages
Spanish (es)
Inventor
Magnus Linsten
Jiri Basta
Ann-Sofie Haellstroem
Original Assignee
Eka Nobel Ab
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=26661599&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=MX9307413(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from SE9203584A external-priority patent/SE9203584D0/en
Priority claimed from SE9300225A external-priority patent/SE9300225D0/en
Application filed by Eka Nobel Ab filed Critical Eka Nobel Ab
Publication of MX9307413A publication Critical patent/MX9307413A/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
    • D21C9/1026—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
    • D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Micro-Organisms Or Cultivation Processes Thereof (AREA)

Abstract

Un proceso para blanquear pulpa que contiene lignocelulosa con un compuesto que contiene peróxido, ozono o ditionita sódica, caracterizado porque la pulpa, antes de dicho blanqueo, en una secuencia, se trata primero con un agente de complexión con un pH comprendido entro 3.5 y aproximadamente 11 y a una temperatura dentro del rango de 26 grados centígrados a aproximadamente 100 grados centígrados, y después se deslignifica con un parecido orgánico o sales del mismo a una temperatura dentro del rango de 50 grados centígrados hasta aproximadamente 140 grados centígrados, y porque la pulpa, antes de dicho blanqueo, se lava en un pH de cuando menos aproximadamente 4.A process for bleaching pulp containing lignocellulose with a compound containing peroxide, ozone or sodium dithionite, characterized in that the pulp, before said bleaching, in a sequence, is first treated with a complexing agent with a pH between 3.5 and approximately 11 and at a temperature within the range of 26 degrees Celsius to approximately 100 degrees Celsius, and then delignifies with organic resemblance or salts thereof at a temperature within the range of 50 degrees Celsius to approximately 140 degrees Celsius, and because the pulp, before said bleaching, it is washed at a pH of at least about 4.

MX9307413A 1992-11-27 1993-11-25 PROCESS FOR WHITENING PULP CONTAINING LIGNOCELLULOSE. MX9307413A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9203584A SE9203584D0 (en) 1992-11-27 1992-11-27 PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MACHINE
SE9300225A SE9300225D0 (en) 1993-01-26 1993-01-26 PROCEDURES FOR BLACKING OF LIGNOCELLULOSALLY MACHINE

Publications (1)

Publication Number Publication Date
MX9307413A true MX9307413A (en) 1994-07-29

Family

ID=26661599

Family Applications (1)

Application Number Title Priority Date Filing Date
MX9307413A MX9307413A (en) 1992-11-27 1993-11-25 PROCESS FOR WHITENING PULP CONTAINING LIGNOCELLULOSE.

Country Status (16)

Country Link
EP (1) EP0670929B2 (en)
JP (1) JPH08503749A (en)
AT (1) ATE141972T1 (en)
AU (1) AU671337B2 (en)
BR (1) BR9307520A (en)
CA (1) CA2149649C (en)
CZ (1) CZ285246B6 (en)
DE (1) DE69304342T3 (en)
ES (1) ES2091121T3 (en)
FI (1) FI118572B (en)
MX (1) MX9307413A (en)
NO (1) NO306737B1 (en)
NZ (1) NZ258273A (en)
PL (1) PL309190A1 (en)
RU (1) RU2097463C1 (en)
WO (1) WO1994012722A1 (en)

Families Citing this family (7)

* 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.
US5656130A (en) * 1995-04-28 1997-08-12 Union Camp Holding, Inc. Ambient temperature pulp bleaching with peroxyacid salts
USH1690H (en) * 1995-07-20 1997-11-04 Nye; Jeffrey Process for bleaching kraft pulp
SE9503004L (en) * 1995-08-30 1997-03-01 Sunds Defibrator Ind Ab Bleaching of pulp
DE19704054C2 (en) * 1997-02-04 2000-08-10 Stockhausen Chem Fab Gmbh Process for the production of fibrous materials with improved properties
US6702921B2 (en) * 2001-05-01 2004-03-09 Ondeo Nalco Company Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agent
DE602004011911T9 (en) * 2004-06-14 2009-01-02 Warwick International Group Ltd., Holywell Activator for pulp bleaching

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219505C3 (en) † 1972-04-21 1974-10-17 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt Chlorine-free multi-stage bleaching of cellulose
DE3005947B1 (en) † 1980-02-16 1981-01-29 Degussa Process for bleaching pulp using organic peracid
JPS5721591A (en) † 1980-07-11 1982-02-04 Mitsubishi Gas Chemical Co Peroxide bleaching of wood pulp
DE69004492T3 (en) * 1989-06-06 2001-11-15 Eka Nobel Ab, Bohus Process for bleaching pulps containing lignocellulose.
US5091054A (en) * 1989-08-18 1992-02-25 Degussa Corporation Process for bleaching and delignification of lignocellulosic
BE1004674A3 (en) * 1991-03-11 1993-01-12 Interox Internat Sa Method of laundering of chemical pulp and application of the method of laundering pulp kraft.
DE4114135A1 (en) † 1991-04-30 1992-11-05 Sueddeutsche Kalkstickstoff Chlorine-free bleaching and delignification of alkali cellulose - by first treating with aq. organic peracid soln. and then with cyanamide (salt) activated hydrogen peroxide soln.
EP0844328A3 (en) * 1991-10-04 1998-07-15 Solvay Interox, Inc. Process for improving the selectivity in the delignification of a chemical pulp
BE1006057A3 (en) † 1992-07-06 1994-05-03 Solvay Interox Method for delignification of chemical pulp.

Also Published As

Publication number Publication date
FI952551A7 (en) 1995-05-24
FI952551A0 (en) 1995-05-24
ES2091121T3 (en) 1996-10-16
NO952074L (en) 1995-07-26
JPH08503749A (en) 1996-04-23
NZ258273A (en) 1996-08-27
DE69304342T3 (en) 2004-07-01
DE69304342D1 (en) 1996-10-02
PL309190A1 (en) 1995-09-18
FI118572B (en) 2007-12-31
EP0670929A1 (en) 1995-09-13
WO1994012722A1 (en) 1994-06-09
RU95113460A (en) 1996-12-27
CA2149649C (en) 2000-09-19
DE69304342T2 (en) 1997-03-06
EP0670929B2 (en) 2003-10-22
AU5583194A (en) 1994-06-22
RU2097463C1 (en) 1997-11-27
NO306737B1 (en) 1999-12-13
ATE141972T1 (en) 1996-09-15
BR9307520A (en) 1999-08-31
NO952074D0 (en) 1995-05-26
CZ285246B6 (en) 1999-06-16
EP0670929B1 (en) 1996-08-28
CZ132895A3 (en) 1996-01-17
AU671337B2 (en) 1996-08-22

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Legal Events

Date Code Title Description
FG Grant or registration
MM Annulment or lapse due to non-payment of fees