FI68273C - Foerfarande foer framstaellning av barrtraedscellulosa foer keisk vidarebehandling saosom foer framstaellning av specia lppper - Google Patents
Foerfarande foer framstaellning av barrtraedscellulosa foer keisk vidarebehandling saosom foer framstaellning av specia lppper Download PDFInfo
- Publication number
- FI68273C FI68273C FI782869A FI782869A FI68273C FI 68273 C FI68273 C FI 68273C FI 782869 A FI782869 A FI 782869A FI 782869 A FI782869 A FI 782869A FI 68273 C FI68273 C FI 68273C
- Authority
- FI
- Finland
- Prior art keywords
- foer
- pulp
- lignin
- peroxide
- framstaellning
- 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
- D21C9/08—Removal of fats, resins, pitch or waxes; Chemical or physical purification, i.e. refining, of crude cellulose by removing non-cellulosic contaminants, optionally combined with bleaching
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Cosmetics (AREA)
- Sanitary Thin Papers (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2742262 | 1977-09-20 | ||
DE2742262A DE2742262C2 (de) | 1977-09-20 | 1977-09-20 | Verfahren zur Herstellung eines mittel- bis hochviskosen Nadelholz-Sulfitzellstoffs |
Publications (3)
Publication Number | Publication Date |
---|---|
FI782869A FI782869A (fi) | 1979-03-21 |
FI68273B FI68273B (fi) | 1985-04-30 |
FI68273C true FI68273C (fi) | 1985-08-12 |
Family
ID=6019413
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI782869A FI68273C (fi) | 1977-09-20 | 1978-09-20 | Foerfarande foer framstaellning av barrtraedscellulosa foer keisk vidarebehandling saosom foer framstaellning av specia lppper |
Country Status (16)
Country | Link |
---|---|
JP (1) | JPS5455606A (sv) |
AR (1) | AR218936A1 (sv) |
AT (1) | AT367812B (sv) |
BE (1) | BE870607A (sv) |
BR (1) | BR7806050A (sv) |
CA (1) | CA1133660A (sv) |
CH (1) | CH638003A5 (sv) |
DE (1) | DE2742262C2 (sv) |
ES (1) | ES472687A1 (sv) |
FI (1) | FI68273C (sv) |
FR (1) | FR2403418A1 (sv) |
GB (1) | GB2005743B (sv) |
IT (1) | IT1109111B (sv) |
NO (1) | NO153978C (sv) |
SE (1) | SE7809831L (sv) |
ZA (1) | ZA785356B (sv) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2520397A1 (fr) * | 1982-01-28 | 1983-07-29 | Centre Tech Ind Papier | Procede pour le traitement de pates papetieres chimiques |
DE4031597A1 (de) * | 1990-10-05 | 1992-04-09 | Sueddeutsche Kalkstickstoff | Verfahren zur chlorarmen bleiche und delignifizierung von zellstoff |
SE470065C (sv) * | 1991-04-30 | 1996-01-15 | Eka Nobel Ab | Behandling av kemisk massa med en syra och därefter en magnesium- och kalciumförening vid klorfri blekning |
US6398908B1 (en) | 1991-04-30 | 2002-06-04 | Eka Nobel Ab | Process for acid bleaching of lignocellulose-containing pulp with a magnesium compound |
DE102007036376A1 (de) * | 2007-07-31 | 2009-02-05 | Voith Patent Gmbh | Gebleichter Faserstoff |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2026068A (en) * | 1929-09-11 | 1935-12-31 | Du Pont | Process for the improvement of cellulose |
DE753531C (de) * | 1938-11-09 | 1953-05-18 | Degussa | Verfahren zum Bleichen von Zellstoff |
-
1977
- 1977-09-20 DE DE2742262A patent/DE2742262C2/de not_active Expired
-
1978
- 1978-08-18 ES ES472687A patent/ES472687A1/es not_active Expired
- 1978-08-18 NO NO782820A patent/NO153978C/no unknown
- 1978-08-21 FR FR7824288A patent/FR2403418A1/fr active Granted
- 1978-09-15 BR BR7806050A patent/BR7806050A/pt unknown
- 1978-09-19 GB GB7837320A patent/GB2005743B/en not_active Expired
- 1978-09-19 IT IT69162/78A patent/IT1109111B/it active
- 1978-09-19 SE SE7809831A patent/SE7809831L/sv unknown
- 1978-09-19 CH CH978978A patent/CH638003A5/de not_active IP Right Cessation
- 1978-09-19 AT AT0675678A patent/AT367812B/de not_active IP Right Cessation
- 1978-09-19 BE BE6046608A patent/BE870607A/xx not_active IP Right Cessation
- 1978-09-20 JP JP11470478A patent/JPS5455606A/ja active Pending
- 1978-09-20 FI FI782869A patent/FI68273C/fi not_active IP Right Cessation
- 1978-09-20 ZA ZA00785356A patent/ZA785356B/xx unknown
- 1978-09-20 AR AR273785A patent/AR218936A1/es active
- 1978-09-20 CA CA311,653A patent/CA1133660A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1133660A (en) | 1982-10-19 |
IT1109111B (it) | 1985-12-16 |
FI68273B (fi) | 1985-04-30 |
IT7869162A0 (it) | 1978-09-19 |
GB2005743B (en) | 1982-03-03 |
NO782820L (no) | 1979-03-21 |
BE870607A (fr) | 1979-03-19 |
NO153978C (no) | 1986-06-25 |
FR2403418A1 (fr) | 1979-04-13 |
FI782869A (fi) | 1979-03-21 |
ATA675678A (de) | 1981-12-15 |
ES472687A1 (es) | 1979-02-16 |
FR2403418B1 (sv) | 1982-07-02 |
ZA785356B (en) | 1979-09-26 |
JPS5455606A (en) | 1979-05-02 |
DE2742262A1 (de) | 1979-03-29 |
AR218936A1 (es) | 1980-07-15 |
BR7806050A (pt) | 1979-05-02 |
DE2742262C2 (de) | 1982-06-09 |
AT367812B (de) | 1982-08-10 |
GB2005743A (en) | 1979-04-25 |
NO153978B (no) | 1986-03-17 |
CH638003A5 (de) | 1983-08-31 |
SE7809831L (sv) | 1979-03-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
MM | Patent lapsed |
Owner name: SCHWAEBISCHE AKTIENGESELLSCHAFT Owner name: DEGUSSA AKTIENGESELLSCHAFT |