FR2177877A1 - Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props - Google Patents
Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve propsInfo
- Publication number
- FR2177877A1 FR2177877A1 FR7310381A FR7310381A FR2177877A1 FR 2177877 A1 FR2177877 A1 FR 2177877A1 FR 7310381 A FR7310381 A FR 7310381A FR 7310381 A FR7310381 A FR 7310381A FR 2177877 A1 FR2177877 A1 FR 2177877A1
- Authority
- FR
- France
- Prior art keywords
- pulp
- bleaching
- impregnation
- props
- improve
- 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.)
- Granted
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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
Cellulosic pulp, destined for bleaching with O2 contg. gas, is produced under press. by any conventional digestion process. Most of the digestion liquor is removed in a washing stage by displacement with a countercurrent of liquor used in the bleaching process. The washed pulp passes to an impregnation zone where it is contacted with sufficient alkali for the bleaching process and impregnated with cellulose decompsn inhibitors. Each stage is effected under pressure. The pulp is then bleached. Pulp of improved mechanical properties is obtd, with more efficient use of materials and heat.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7204251A SE373397C (en) | 1972-03-30 | 1972-03-30 | WAY TO IMPROVE THE WHEATING WHITING WHEN BLINDING CELLULOSAMASSA WITH AN ACID CONTAINING GAS |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2177877A1 true FR2177877A1 (en) | 1973-11-09 |
FR2177877B1 FR2177877B1 (en) | 1975-08-22 |
Family
ID=20263802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7310381A Granted FR2177877A1 (en) | 1972-03-30 | 1973-03-22 | Bleaching cellulose pulp - with impregnation of pulp prior to bleaching to improve props |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS5116524B2 (en) |
CA (1) | CA1001360A (en) |
FI (1) | FI60733C (en) |
FR (1) | FR2177877A1 (en) |
SE (1) | SE373397C (en) |
SU (1) | SU847932A3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992007994A1 (en) * | 1990-10-24 | 1992-05-14 | Beloit Corporation | Pulping process |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE394466C (en) * | 1974-05-16 | 1986-06-23 | Mannbro Systems Handelsbolag | SEE CONTINUOUS ALKALIC DELIGNIFICATION OF LIGNOCELLULOSAMENTAL MATERIAL IN TWO OR MULTIPLE STEPS, WHICH ARE LAST WITH Oxygen |
JPS583074B2 (en) * | 1975-11-17 | 1983-01-19 | 三菱瓦斯化学株式会社 | Palpuno Kasan Kabutsu Hiyou Hakuhou |
-
1972
- 1972-03-30 SE SE7204251A patent/SE373397C/en unknown
-
1973
- 1973-03-21 CA CA166,648A patent/CA1001360A/en not_active Expired
- 1973-03-22 FR FR7310381A patent/FR2177877A1/en active Granted
- 1973-03-22 FI FI90273A patent/FI60733C/en active
- 1973-03-29 SU SU731900403A patent/SU847932A3/en active
- 1973-03-30 JP JP3585773A patent/JPS5116524B2/ja not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992007994A1 (en) * | 1990-10-24 | 1992-05-14 | Beloit Corporation | Pulping process |
Also Published As
Publication number | Publication date |
---|---|
FR2177877B1 (en) | 1975-08-22 |
SU847932A3 (en) | 1981-07-15 |
SE373397C (en) | 1984-02-06 |
JPS5116524B2 (en) | 1976-05-25 |
CA1001360A (en) | 1976-12-14 |
FI60733B (en) | 1981-11-30 |
SE373397B (en) | 1975-02-03 |
FI60733C (en) | 1982-03-10 |
JPS497503A (en) | 1974-01-23 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |