JPS4992302A - - Google Patents
Info
- Publication number
- JPS4992302A JPS4992302A JP8556273A JP8556273A JPS4992302A JP S4992302 A JPS4992302 A JP S4992302A JP 8556273 A JP8556273 A JP 8556273A JP 8556273 A JP8556273 A JP 8556273A JP S4992302 A JPS4992302 A JP S4992302A
- Authority
- JP
- Japan
- 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/04—Pretreatment of the finely-divided materials before digesting with acid reacting compounds
Landscapes
- Paper (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Glass Compositions (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US27685372A | 1972-07-31 | 1972-07-31 | |
| US00362009A US3841962A (en) | 1972-07-31 | 1973-05-21 | Hydrogen sulfide pretreatment of lignocellulosic materials in alkaline pulping processes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS4992302A true JPS4992302A (en:Method) | 1974-09-03 |
| JPS5217121B2 JPS5217121B2 (en:Method) | 1977-05-13 |
Family
ID=26958163
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8556273A Expired JPS5217121B2 (en:Method) | 1972-07-31 | 1973-07-31 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS5217121B2 (en:Method) |
| FI (1) | FI55693C (en:Method) |
| FR (1) | FR2194840A1 (en:Method) |
| NO (1) | NO137099C (en:Method) |
| SE (1) | SE389135B (en:Method) |
-
1973
- 1973-07-25 SE SE7310326A patent/SE389135B/xx unknown
- 1973-07-26 FI FI236673A patent/FI55693C/fi active
- 1973-07-27 FR FR7327715A patent/FR2194840A1/fr active Granted
- 1973-07-30 NO NO305173A patent/NO137099C/no unknown
- 1973-07-31 JP JP8556273A patent/JPS5217121B2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| SE389135B (sv) | 1976-10-25 |
| NO137099C (no) | 1977-12-28 |
| FI55693B (fi) | 1979-05-31 |
| NO137099B (no) | 1977-09-19 |
| FR2194840A1 (en) | 1974-03-01 |
| JPS5217121B2 (en:Method) | 1977-05-13 |
| FR2194840B1 (en:Method) | 1976-04-30 |
| FI55693C (fi) | 1979-09-10 |