SE7609148L - PROCEDURE FOR THE PREPARATION OF CELLULOSA - Google Patents
PROCEDURE FOR THE PREPARATION OF CELLULOSAInfo
- Publication number
- SE7609148L SE7609148L SE7609148A SE7609148A SE7609148L SE 7609148 L SE7609148 L SE 7609148L SE 7609148 A SE7609148 A SE 7609148A SE 7609148 A SE7609148 A SE 7609148A SE 7609148 L SE7609148 L SE 7609148L
- Authority
- SE
- Sweden
- Prior art keywords
- raw material
- cellulosa
- procedure
- preparation
- delignification
- Prior art date
Links
- 239000002994 raw material Substances 0.000 abstract 5
- 239000003513 alkali Substances 0.000 abstract 3
- 239000000126 substance Substances 0.000 abstract 2
- 229920001131 Pulp (paper) Polymers 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/02—Pulping cellulose-containing materials with inorganic bases or alkaline reacting compounds, e.g. sulfate processes
-
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The present invention provides a method of manufacturing a chemical pulp from a fibrous raw material which comprises homogeneously impregnating the fibrous raw material with an alkali solution of weaker chemical activity whereby to minimize delignification of said raw material, subjecting said alkali impregnated raw material to mechanical defibration and treating said defibrated raw material with an alkali solution of stronger chemical activity to effect delignification thereof.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR7505352 | 1975-08-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
SE7609148L true SE7609148L (en) | 1977-02-21 |
Family
ID=3996454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7609148A SE7609148L (en) | 1975-08-20 | 1976-08-17 | PROCEDURE FOR THE PREPARATION OF CELLULOSA |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPS5237802A (en) |
CA (1) | CA1066697A (en) |
FI (1) | FI762341A (en) |
SE (1) | SE7609148L (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FI20105799A0 (en) | 2010-07-13 | 2010-07-13 | Olli Joutsimo | Improved chemical pulp manufacturing process |
WO2018187238A1 (en) * | 2017-04-03 | 2018-10-11 | University Of Maryland, College Park | Flexible wood structures and devices, and methods for fabricating and use thereof |
US20180356127A1 (en) | 2017-06-09 | 2018-12-13 | University Of Maryland, College Park | Wood-based solar thermal devices, and methods for fabrication and use thereof |
EP3681682A4 (en) | 2017-09-15 | 2021-06-16 | University of Maryland, College Park | Delignified wood materials, and methods for fabricating and use thereof |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3773610A (en) * | 1970-12-11 | 1973-11-20 | Bauer Bros Co | Pressurized system for pulp refining including pressurized double disk treatment |
JPS4887101A (en) * | 1972-02-22 | 1973-11-16 |
-
1976
- 1976-08-17 FI FI762341A patent/FI762341A/fi not_active Application Discontinuation
- 1976-08-17 SE SE7609148A patent/SE7609148L/en not_active Application Discontinuation
- 1976-08-20 JP JP51098812A patent/JPS5237802A/en active Pending
- 1976-08-20 CA CA259,578A patent/CA1066697A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
CA1066697A (en) | 1979-11-20 |
JPS5237802A (en) | 1977-03-24 |
FI762341A (en) | 1977-02-21 |
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