SE8504083L - METHOD OF PRODUCING CELLULOSAMASSA - Google Patents
METHOD OF PRODUCING CELLULOSAMASSAInfo
- Publication number
- SE8504083L SE8504083L SE8504083A SE8504083A SE8504083L SE 8504083 L SE8504083 L SE 8504083L SE 8504083 A SE8504083 A SE 8504083A SE 8504083 A SE8504083 A SE 8504083A SE 8504083 L SE8504083 L SE 8504083L
- Authority
- SE
- Sweden
- Prior art keywords
- raw material
- fibrous raw
- pressure vessel
- sodium carbonate
- pressure
- 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
- D21C3/00—Pulping cellulose-containing materials
- D21C3/04—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides
- D21C3/06—Pulping cellulose-containing materials with acids, acid salts or acid anhydrides sulfur dioxide; sulfurous acid; bisulfites sulfites
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21B—FIBROUS RAW MATERIALS OR THEIR MECHANICAL TREATMENT
- D21B1/00—Fibrous raw materials or their mechanical treatment
- D21B1/04—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres
- D21B1/12—Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods, by the use of steam
- D21B1/30—Defibrating by other means
- D21B1/36—Explosive disintegration by sudden pressure reduction
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
A method for the production of cellulosic pulp comprises defibration of a fibrous raw material consisting of wood chips, straw, bagasse, reed or the like. The fibrous raw material is impregnated by an aqueous solution of sodium carbonate. The fibrous raw material impregnated with sodium carbonate is fed to a pressure vessel (5). The material in the pressure vessel (5) is acidified by supplying sulphur dioxide to the pressure vessel (5), said sulphur dioxide reacting with said sodium carbonate to generate sodium sulphite and carbon dioxide, said reaction at least partly taking place in situ in the fibrous raw material. The material in the pressure vessel (5) thereafter for a short period of time is heated by saturated steam at a pressure of 20-100 bar, which further promotes said reaction. Thereafter the material is rapidly discharged and caused to expand in a second vessel (22) under a substantially lower and substantially constant pressure.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8504083A SE455314B (en) | 1985-09-03 | 1985-09-03 | PREPARATION OF CELLULOSAMASA INCLUDING CHEMICAL PREPARATION AND DEFIBRATION BY EXPANSION |
PCT/SE1986/000389 WO1987001402A1 (en) | 1985-09-03 | 1986-09-02 | Method for producing of cellulosic pulp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8504083A SE455314B (en) | 1985-09-03 | 1985-09-03 | PREPARATION OF CELLULOSAMASA INCLUDING CHEMICAL PREPARATION AND DEFIBRATION BY EXPANSION |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8504083D0 SE8504083D0 (en) | 1985-09-03 |
SE8504083L true SE8504083L (en) | 1987-03-04 |
SE455314B SE455314B (en) | 1988-07-04 |
Family
ID=20361275
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8504083A SE455314B (en) | 1985-09-03 | 1985-09-03 | PREPARATION OF CELLULOSAMASA INCLUDING CHEMICAL PREPARATION AND DEFIBRATION BY EXPANSION |
Country Status (2)
Country | Link |
---|---|
SE (1) | SE455314B (en) |
WO (1) | WO1987001402A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1230208A (en) * | 1987-03-24 | 1987-12-15 | Bohuslav V. Kokta | Process for preparing pulp for paper making |
CA2037275A1 (en) * | 1991-02-28 | 1992-08-29 | Bohuslav V. Kokta | Steam explosion pulping process for papermaking |
US6413362B1 (en) | 1999-11-24 | 2002-07-02 | Kimberly-Clark Worldwide, Inc. | Method of steam treating low yield papermaking fibers to produce a permanent curl |
KR20010100017A (en) | 1998-12-30 | 2001-11-09 | 로날드 디. 맥크레이 | Steam Explosion Treatment with Addition of Chemicals |
EP1571255A1 (en) * | 2004-03-03 | 2005-09-07 | SCA Hygiene Products GmbH | Apparatus and method for reducing steam loss in a closed system |
WO2010124381A1 (en) | 2009-04-30 | 2010-11-04 | Evegenetics Canada Inc. | Preparation of biofuels and other useful products such as 5-(hydroxymethyl)-furfural |
NZ578113A (en) * | 2009-07-01 | 2010-07-30 | Lignotech Developments Ltd | Processing of lignocellulosic and related materials |
EP2336344A1 (en) | 2009-12-21 | 2011-06-22 | Sekab E-Technology AB | Pre-treatment of cellulosic material |
CN104562827B (en) * | 2014-12-11 | 2016-06-01 | 陕西科技大学 | The dynamic shaping device of a kind of laboratory simulation long mesh paper making machine |
SG11202109864PA (en) * | 2019-03-20 | 2021-10-28 | Ymir Tech Ehf | Steam-explosion equipment and method for treatment of organic material |
WO2021110188A1 (en) * | 2019-12-03 | 2021-06-10 | Klingele Papierwerke Gmbh & Co. Kg | Method and device for producing fibrous material with a feed system and a helical screw system |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1872996A (en) * | 1925-05-21 | 1932-08-23 | Masonite Corp | Process of making paper pulp |
US2234188A (en) * | 1938-03-31 | 1941-03-11 | Masonite Corp | Process of making light-colored ligno-cellulose fiber |
SE434652B (en) * | 1977-04-27 | 1984-08-06 | Commw Scient Ind Res Org | PROCEDURE FOR EXPLOSION DEFIBRATION OF CELLULOSIC FIBERS FROM VEGETABLE MATERIAL AND EXHAUST NOZZLE FOR IMPLEMENTATION OF THE PROCEDURE |
-
1985
- 1985-09-03 SE SE8504083A patent/SE455314B/en not_active IP Right Cessation
-
1986
- 1986-09-02 WO PCT/SE1986/000389 patent/WO1987001402A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
WO1987001402A1 (en) | 1987-03-12 |
SE8504083D0 (en) | 1985-09-03 |
SE455314B (en) | 1988-07-04 |
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