PT89533A - Processo para a preparacao de pasta de celulose kraft semibranqueada - Google Patents

Processo para a preparacao de pasta de celulose kraft semibranqueada

Info

Publication number
PT89533A
PT89533A PT89533A PT8953389A PT89533A PT 89533 A PT89533 A PT 89533A PT 89533 A PT89533 A PT 89533A PT 8953389 A PT8953389 A PT 8953389A PT 89533 A PT89533 A PT 89533A
Authority
PT
Portugal
Prior art keywords
paste
semi
preparation
reduced
kraft cellulose
Prior art date
Application number
PT89533A
Other languages
English (en)
Inventor
Oswald Helmling
Hans Ulrich Suss
Jurgen Meier
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Publication of PT89533A publication Critical patent/PT89533A/pt

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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
PT89533A 1988-01-28 1989-01-26 Processo para a preparacao de pasta de celulose kraft semibranqueada PT89533A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE3802401A DE3802401A1 (de) 1988-01-28 1988-01-28 Verfahren zur herstellung von halbgebleichtem kraftzellstoff

Publications (1)

Publication Number Publication Date
PT89533A true PT89533A (pt) 1989-10-04

Family

ID=6346109

Family Applications (1)

Application Number Title Priority Date Filing Date
PT89533A PT89533A (pt) 1988-01-28 1989-01-26 Processo para a preparacao de pasta de celulose kraft semibranqueada

Country Status (9)

Country Link
EP (1) EP0325731A1 (pt)
AU (1) AU607026B2 (pt)
BR (1) BR8900259A (pt)
DE (1) DE3802401A1 (pt)
FI (1) FI890100A (pt)
NO (1) NO885525L (pt)
NZ (1) NZ227748A (pt)
PT (1) PT89533A (pt)
ZA (1) ZA889289B (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE460124B (sv) * 1988-09-14 1989-09-11 Sunds Defibrator Saett foer framstaellning av kemimekanisk massa av loevved
DE4004364A1 (de) * 1990-02-13 1991-08-14 Sueddeutsche Kalkstickstoff Verfahren zur chlorfreien bleiche und delignifizierung von zellstoff
SE466060C (sv) 1990-02-13 1995-07-11 Moelnlycke Ab Absorberande kemitermomekanisk massa och framställning därav
US5607546A (en) * 1990-02-13 1997-03-04 Molnlycke Ab CTMP-process
NZ237019A (en) * 1990-02-19 1992-11-25 Amcor Ltd Bleaching paper pulp by initially treating with oxygen and/or hydrogen peroxide and subsequently treating with a bleaching agent without intervening washing steps
US6398908B1 (en) 1991-04-30 2002-06-04 Eka Nobel Ab Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound
BE1005800A3 (fr) * 1992-05-22 1994-02-01 Solvay Interox Procede pour la delignification et le blanchiment d'une pate a papier chimique.
WO1995008021A1 (en) * 1993-09-15 1995-03-23 Kamyr, Inc. Eop stage for chlorine free bleaching
DE29911772U1 (de) 1999-07-06 1999-09-02 Tien Dieter Reinigungsgerät für glatte Flächen, insbesondere zum Putzen von Fenstern

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1601408A (pt) * 1967-06-20 1970-08-24
FI45574C (fi) * 1970-05-11 1972-07-10 Kymin Oy Kymmene Ab Menetelmä selluloosapitoisten aineiden valkaisemiseksi.
FR2457339A1 (fr) * 1979-05-25 1980-12-19 Interox Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques

Also Published As

Publication number Publication date
EP0325731A1 (de) 1989-08-02
DE3802401A1 (de) 1989-08-03
AU607026B2 (en) 1991-02-21
BR8900259A (pt) 1989-09-19
FI890100A (fi) 1989-07-29
ZA889289B (en) 1989-09-27
NO885525D0 (no) 1988-12-13
NO885525L (no) 1989-07-31
FI890100A0 (fi) 1989-01-09
AU2679888A (en) 1989-08-03
NZ227748A (en) 1990-04-26

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Legal Events

Date Code Title Description
FC3A Refusal

Effective date: 19931025