FR2194840A1 - Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur - Google Patents
Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphurInfo
- Publication number
- FR2194840A1 FR2194840A1 FR7327715A FR7327715A FR2194840A1 FR 2194840 A1 FR2194840 A1 FR 2194840A1 FR 7327715 A FR7327715 A FR 7327715A FR 7327715 A FR7327715 A FR 7327715A FR 2194840 A1 FR2194840 A1 FR 2194840A1
- Authority
- FR
- France
- Prior art keywords
- pulp
- prior
- treatment
- lignocellulosic materials
- sulphur
- 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
- 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)
- Glass Compositions (AREA)
- Crystals, And After-Treatments Of Crystals (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 |
---|---|
FR2194840A1 true FR2194840A1 (en) | 1974-03-01 |
FR2194840B1 FR2194840B1 (sr) | 1976-04-30 |
Family
ID=26958163
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7327715A Granted FR2194840A1 (en) | 1972-07-31 | 1973-07-27 | Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPS5217121B2 (sr) |
FI (1) | FI55693C (sr) |
FR (1) | FR2194840A1 (sr) |
NO (1) | NO137099C (sr) |
SE (1) | SE389135B (sr) |
-
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
Non-Patent Citations (1)
Title |
---|
NEANT * |
Also Published As
Publication number | Publication date |
---|---|
NO137099C (no) | 1977-12-28 |
FR2194840B1 (sr) | 1976-04-30 |
JPS4992302A (sr) | 1974-09-03 |
JPS5217121B2 (sr) | 1977-05-13 |
SE389135B (sv) | 1976-10-25 |
NO137099B (no) | 1977-09-19 |
FI55693C (fi) | 1979-09-10 |
FI55693B (fi) | 1979-05-31 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
ES425711A1 (es) | Procedimiento para la desliquificacion de un material lig- nocelulosico. | |
GB1434232A (en) | Method of producing cellulose pulp by means of oxygen gas delignification | |
FR2194840A1 (en) | Hydrogen sulphide treatment of lignocellulosic materials - prior to alkaline digestion in pulp prodn. to eliminate loss of sulphur | |
GB785561A (en) | Regeneration of ammonia-sulphur dioxide cooking acid used in production of wood pulp | |
GB1007796A (en) | Production of soda ash | |
Hartler et al. | Oxygen-alkali bleaching of sulphate pulp | |
GB815247A (en) | Bleaching woob pulps | |
FR2049779A5 (en) | Recovery of chemicals from sulphite pulp - waste liquor | |
GB1015835A (en) | A method of producing a highly porous, light and flowable sodium perborate | |
GB1278519A (en) | Production of sodium perborate | |
GB637578A (en) | Methods for extracting alumina from raw anhydrous calcium aluminates | |
GB758766A (en) | Process for the production of pulp from bagasse | |
GB1323931A (en) | Desulphurization of flue gas | |
GB1470299A (en) | Process for removing so2 from gases | |
SU128282A1 (ru) | Способ получени содового плава дл производства сульфатной целлюлозы. | |
ES414549A1 (es) | Procedimiento de fabricacion de abonos humicos. | |
GB1068331A (en) | Improvements in or relating to methods of preparing pulp | |
Giro | Carbonation of spent monosulphite pulping liquors | |
GB1356527A (en) | Methods of washing away gypseous scale from scrubbers for smoke desulphurization by the wet lime-gypsum process | |
GB958866A (en) | Production of ethylene sulphide | |
GB787172A (en) | Process for the production of sodium sulphide | |
GB389218A (en) | Process for producing waste liquors with a high content of organic substances in thedigestion of sulphite pulp | |
FR2143898A1 (en) | Hydrogen sulphide extn from bisulphides - by multistage reaction with bicarbonate | |
GB1007873A (en) | Process for the manufacture of boric acid from calcium borate ores | |
GB1241575A (en) | Process for converting gypsum to calcium sulphide and apparatus therefor |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |