FR2390541B1 - - Google Patents
Info
- Publication number
- FR2390541B1 FR2390541B1 FR7807150A FR7807150A FR2390541B1 FR 2390541 B1 FR2390541 B1 FR 2390541B1 FR 7807150 A FR7807150 A FR 7807150A FR 7807150 A FR7807150 A FR 7807150A FR 2390541 B1 FR2390541 B1 FR 2390541B1
- Authority
- FR
- France
- 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
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
- D21C9/1005—Pretreatment of the pulp, e.g. degassing the pulp
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 |
---|---|---|---|
DE19772721402 DE2721402C2 (de) | 1977-05-12 | 1977-05-12 | Verfahren zum Bleichen von Zellstoff |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2390541A1 FR2390541A1 (fr) | 1978-12-08 |
FR2390541B1 true FR2390541B1 (fr) | 1981-04-30 |
Family
ID=6008737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7807150A Granted FR2390541A1 (fr) | 1977-05-12 | 1978-03-13 | Procede de blanchiment de cellulose |
Country Status (4)
Country | Link |
---|---|
AT (1) | AT364243B (fr) |
CH (1) | CH633844A5 (fr) |
DE (1) | DE2721402C2 (fr) |
FR (1) | FR2390541A1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2841013C2 (de) * | 1978-09-21 | 1984-06-07 | Degussa Ag, 6000 Frankfurt | Verfahren zur Vollbleiche von Zellstoff |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE436804C (de) * | 1924-05-22 | 1926-11-09 | Erich Opfermann Dr | Verfahren zur Bleichung von Zellstoff |
US2026068A (en) * | 1929-09-11 | 1935-12-31 | Du Pont | Process for the improvement of cellulose |
US1998389A (en) * | 1929-11-23 | 1935-04-16 | Scheller Emil | Process for improving cellulose |
US2083294A (en) * | 1932-05-16 | 1937-06-08 | Francis J Cirves | Process for bleaching pulp |
DE736070C (de) * | 1938-07-01 | 1943-06-07 | Degussa | Verfahren zum Behandeln von Zellstoff |
US2527563A (en) * | 1947-08-13 | 1950-10-31 | Buffalo Electro Chem Co | Method of bleaching semichemical pulps |
NO138491B (no) * | 1974-04-17 | 1978-06-05 | Per Kock Christensen | Fremgangsmaate ved delignifisering og bleking av cellulosemasse |
-
1977
- 1977-05-12 DE DE19772721402 patent/DE2721402C2/de not_active Expired
-
1978
- 1978-03-13 FR FR7807150A patent/FR2390541A1/fr active Granted
- 1978-05-10 AT AT339178A patent/AT364243B/de not_active IP Right Cessation
- 1978-05-11 CH CH514378A patent/CH633844A5/de not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE2721402C2 (de) | 1984-04-12 |
CH633844A5 (en) | 1982-12-31 |
FR2390541A1 (fr) | 1978-12-08 |
ATA339178A (de) | 1981-02-15 |
AT364243B (de) | 1981-10-12 |
DE2721402A1 (de) | 1978-11-16 |
Similar Documents
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |