SE9603415L - Process for producing high yield cellulose pulp - Google Patents
Process for producing high yield cellulose pulpInfo
- Publication number
- SE9603415L SE9603415L SE9603415A SE9603415A SE9603415L SE 9603415 L SE9603415 L SE 9603415L SE 9603415 A SE9603415 A SE 9603415A SE 9603415 A SE9603415 A SE 9603415A SE 9603415 L SE9603415 L SE 9603415L
- Authority
- SE
- Sweden
- Prior art keywords
- cooking
- flow
- zone
- counter
- cellulose pulp
- Prior art date
Links
- 229920002678 cellulose Polymers 0.000 title abstract 2
- 239000001913 cellulose Substances 0.000 title abstract 2
- 238000000034 method Methods 0.000 title abstract 2
- 238000010411 cooking Methods 0.000 abstract 8
- 238000005470 impregnation Methods 0.000 abstract 3
- OSVXSBDYLRYLIG-UHFFFAOYSA-N dioxidochlorine(.) Chemical compound O=Cl=O OSVXSBDYLRYLIG-UHFFFAOYSA-N 0.000 abstract 2
- 239000007788 liquid Substances 0.000 abstract 2
- 239000002023 wood Substances 0.000 abstract 2
- 239000004155 Chlorine dioxide Substances 0.000 abstract 1
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 238000004061 bleaching Methods 0.000 abstract 1
- 235000019398 chlorine dioxide Nutrition 0.000 abstract 1
- 239000000706 filtrate Substances 0.000 abstract 1
- 238000002203 pretreatment Methods 0.000 abstract 1
- HYHCSLBZRBJJCH-UHFFFAOYSA-M sodium hydrosulfide Chemical compound [Na+].[SH-] HYHCSLBZRBJJCH-UHFFFAOYSA-M 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
- D21C1/00—Pretreatment of the finely-divided materials before digesting
- D21C1/06—Pretreatment of the finely-divided materials before digesting with alkaline reacting compounds
-
- 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
- D21C3/24—Continuous processes
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
Method for the preparation of cellulose pulp comprises a pre-treatment step with an impregnation liquid containing hydrogen sulphide and/or sodium bisulphide, carried out in an impregnation zone at 100-160 deg. C, pressure greater than 3 atmospheres and a pH of 5-10, followed by an alkali cooking step.The impregnation liquid comprises filtrate from the bleaching plant or leftover acid from chlorine dioxide processing. The cooking step contains a cooking zone with unidirectional flow and at least one cooking zone with a counter-flow. Cooking temperature is 165 deg. C for coniferous wood and 155 deg. C for deciduous wood. The temperature in the final counter-flow cooking zone is the same as the highest temperature in the cooking step. Dwell time in the counter-flow cooking zone is >30 minutes.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9603415A SE9603415L (en) | 1996-09-19 | 1996-09-19 | Process for producing high yield cellulose pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9603415A SE9603415L (en) | 1996-09-19 | 1996-09-19 | Process for producing high yield cellulose pulp |
Publications (2)
Publication Number | Publication Date |
---|---|
SE9603415D0 SE9603415D0 (en) | 1996-09-19 |
SE9603415L true SE9603415L (en) | 1998-03-20 |
Family
ID=20403941
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE9603415A SE9603415L (en) | 1996-09-19 | 1996-09-19 | Process for producing high yield cellulose pulp |
Country Status (1)
Country | Link |
---|---|
SE (1) | SE9603415L (en) |
-
1996
- 1996-09-19 SE SE9603415A patent/SE9603415L/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE9603415D0 (en) | 1996-09-19 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2098092A1 (en) | Method of Treatment of Waste Paper of the Like | |
ATE163447T1 (en) | METHOD FOR PRODUCING COLLAGEN FIBERS | |
ATE173741T1 (en) | METHOD FOR PRODUCING CELLULOSE SOLUTIONS | |
SE9604111L (en) | Process and apparatus for preparing chemical cellulose pulp | |
SE8604313D0 (en) | CATIONIC CELLULOSA PRODUCT AND PROCEDURES FOR PRODUCING THEREOF | |
PL289627A1 (en) | Method of separating water from diluted solution of n-mothylmorpholine, n-methylmorpholine and/or morpholine n-oxide | |
SE9603415L (en) | Process for producing high yield cellulose pulp | |
DK0737210T4 (en) | Process for preparing cationic starch | |
DE60039788D1 (en) | METHOD FOR THE PRODUCTION OF PULP AND CALIUM-CONTAINING FERTILIZER | |
ATE141351T1 (en) | METHOD FOR PRODUCING POWER PULP | |
NO920828L (en) | PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES | |
SE9301160L (en) | Process for treating process water | |
ES2119576T3 (en) | PRODUCTION PROCEDURE OF CELLULOSE MOLDED BODIES. | |
ATE384161T1 (en) | METHOD FOR PRODUCING STEAM FROM BLACK LYE | |
SE8106326L (en) | PROCEDURE FOR PREPARING CELLULOSAMASS BY THE SULPHATE METHOD | |
SE8701344D0 (en) | PROCEDURES FOR RECOVERY OF CELL SUBSTANCE | |
ATE111986T1 (en) | PROCESS FOR THE PRODUCTION OF HEMICELLULOSIC HYDROLYSATE AND A SPECIAL PULP. | |
ID20258A (en) | STRENGTH FACTORY PRODUCTION PROCESS | |
NO920830L (en) | PROCEDURE FOR DELIGNIFICATION OF CELLULOSE-SUBSTANCES | |
SU429156A1 (en) | METHOD OF OBTAINING CELLULOSE | |
SU372306A1 (en) | METHOD OF BLEACHING OF CELLULOSE \ SH: U:, -.- to: Y ^ i - ': biji /, \ ,; i L: i'iA, \ Ji_ ", | |
SU891688A1 (en) | Method of preparing cellulose low-substituted alkali-soluble xanthogenates | |
SE8500342L (en) | METHOD OF TREATING CELLULOSAMASSA | |
NO920829L (en) | PROCEDURE FOR THE WHICH OF CHEMICAL MASS IN ALIFATIC MONOCARBOXYL ACIDS | |
DK197882A (en) | PROCEDURE FOR PREPARING 3,3-DIMETHYLUTIC ACID |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
NAV | Patent application has lapsed |