DE59105105D1 - Process for low-chlorine bleaching and delignification of cellulose. - Google Patents

Process for low-chlorine bleaching and delignification of cellulose.

Info

Publication number
DE59105105D1
DE59105105D1 DE59105105T DE59105105T DE59105105D1 DE 59105105 D1 DE59105105 D1 DE 59105105D1 DE 59105105 T DE59105105 T DE 59105105T DE 59105105 T DE59105105 T DE 59105105T DE 59105105 D1 DE59105105 D1 DE 59105105D1
Authority
DE
Germany
Prior art keywords
delignification
low
cellulose
chlorine
chlorine bleaching
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 - Fee Related
Application number
DE59105105T
Other languages
German (de)
Inventor
Werner Dr Sturm
Ludwig Eibl
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.)
Evonik Operations GmbH
Original Assignee
SKW Trostberg AG
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 SKW Trostberg AG filed Critical SKW Trostberg AG
Application granted granted Critical
Publication of DE59105105D1 publication Critical patent/DE59105105D1/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • D21C9/1026—Other features in bleaching processes
    • D21C9/1036—Use of compounds accelerating or improving the efficiency of the processes
    • 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
    • D21C9/16—Bleaching ; Apparatus therefor with per compounds
    • D21C9/163—Bleaching ; Apparatus therefor with per compounds with peroxides

Abstract

A process for low-chlorine bleaching and delignification of pulp is described, a pulp prebleached in an at least two-stage bleaching sequence being treated in an extractive final bleach separately with an aqueous solution of cyanamide and an alkaline solution of hydrogen peroxide. In this way, pulps of high degrees of whiteness can be produced in a chlorine-free final bleach.
DE59105105T 1990-10-05 1991-10-04 Process for low-chlorine bleaching and delignification of cellulose. Expired - Fee Related DE59105105D1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4031597A DE4031597A1 (en) 1990-10-05 1990-10-05 METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR

Publications (1)

Publication Number Publication Date
DE59105105D1 true DE59105105D1 (en) 1995-05-11

Family

ID=6415688

Family Applications (2)

Application Number Title Priority Date Filing Date
DE4031597A Withdrawn DE4031597A1 (en) 1990-10-05 1990-10-05 METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR
DE59105105T Expired - Fee Related DE59105105D1 (en) 1990-10-05 1991-10-04 Process for low-chlorine bleaching and delignification of cellulose.

Family Applications Before (1)

Application Number Title Priority Date Filing Date
DE4031597A Withdrawn DE4031597A1 (en) 1990-10-05 1990-10-05 METHOD FOR LOW-CHLORINE BLEACHING AND DELIGNIFICATION OF CELLULAR

Country Status (7)

Country Link
EP (1) EP0479319B1 (en)
AT (1) ATE120815T1 (en)
CA (1) CA2052758A1 (en)
DE (2) DE4031597A1 (en)
ES (1) ES2070388T3 (en)
FI (1) FI914694A (en)
NO (1) NO913848L (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009045628A1 (en) 2009-10-13 2011-04-14 Henkel Ag & Co. Kgaa Bleach activators for processes for bleaching cellulosic fibers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE664257C (en) * 1929-09-11 1938-08-25 Degussa Process for upgrading cellulose
AT167849B (en) * 1945-01-10 1951-03-10 Buffalo Electro Chem Co Process for bleaching wood pulp
AT183646B (en) * 1950-06-30 1955-10-25 Buffalo Electro Chem Co Process for bleaching sulphate or sulphite pulp
DE2742262C2 (en) * 1977-09-20 1982-06-09 Degussa Ag, 6000 Frankfurt Process for the production of a medium to high viscosity softwood sulphite pulp
US4568420B1 (en) * 1984-12-03 1999-03-02 Int Paper Co Multi-stage bleaching process including an enhanced oxidative extraction stage
FR2589494B1 (en) * 1985-10-30 1988-07-29 Atochem PROCESS FOR BLEACHING CHEMICAL PAPER PULP
DE3544398A1 (en) * 1985-12-16 1987-06-19 Sueddeutsche Kalkstickstoff METHOD FOR THE BLEACHING AND DELIGNIFICATION OF CELLULAR-BASED PRODUCTS
DE4004364A1 (en) * 1990-02-13 1991-08-14 Sueddeutsche Kalkstickstoff Bleaching and delignifying pre-balanced cellulose - in two stages with peroxide activated with cyanamide or cyanamide salt, avoiding agents contg. chlorine

Also Published As

Publication number Publication date
NO913848L (en) 1992-04-06
ES2070388T3 (en) 1995-06-01
ATE120815T1 (en) 1995-04-15
FI914694A (en) 1992-04-06
FI914694A0 (en) 1991-10-04
DE4031597A1 (en) 1992-04-09
EP0479319B1 (en) 1995-04-05
CA2052758A1 (en) 1992-04-06
NO913848D0 (en) 1991-10-01
EP0479319A1 (en) 1992-04-08

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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