PT89533A - Processo para a preparacao de pasta de celulose kraft semibranqueada - Google Patents
Processo para a preparacao de pasta de celulose kraft semibranqueadaInfo
- 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
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)
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)
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 | 1995-09-11 | 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, 48527 Nordhorn | Reinigungsgerät für glatte Flächen, insbesondere zum Putzen von Fenstern |
Family Cites Families (3)
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 |
-
1988
- 1988-01-28 DE DE3802401A patent/DE3802401A1/de not_active Withdrawn
- 1988-11-30 EP EP88119939A patent/EP0325731A1/de not_active Ceased
- 1988-12-12 ZA ZA889289A patent/ZA889289B/xx unknown
- 1988-12-12 AU AU26798/88A patent/AU607026B2/en not_active Ceased
- 1988-12-13 NO NO88885525A patent/NO885525L/no unknown
-
1989
- 1989-01-09 FI FI890100A patent/FI890100A/fi not_active IP Right Cessation
- 1989-01-23 BR BR898900259A patent/BR8900259A/pt unknown
- 1989-01-26 NZ NZ227748A patent/NZ227748A/en unknown
- 1989-01-26 PT PT89533A patent/PT89533A/pt not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
DE3802401A1 (de) | 1989-08-03 |
AU607026B2 (en) | 1991-02-21 |
AU2679888A (en) | 1989-08-03 |
ZA889289B (en) | 1989-09-27 |
FI890100A0 (fi) | 1989-01-09 |
NO885525L (no) | 1989-07-31 |
NZ227748A (en) | 1990-04-26 |
BR8900259A (pt) | 1989-09-19 |
NO885525D0 (no) | 1988-12-13 |
FI890100A (fi) | 1989-07-29 |
EP0325731A1 (de) | 1989-08-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FC3A | Refusal |
Effective date: 19931025 |