DE69121332D1 - METHOD FOR PRODUCING POWERS - Google Patents
METHOD FOR PRODUCING POWERSInfo
- Publication number
- DE69121332D1 DE69121332D1 DE69121332T DE69121332T DE69121332D1 DE 69121332 D1 DE69121332 D1 DE 69121332D1 DE 69121332 T DE69121332 T DE 69121332T DE 69121332 T DE69121332 T DE 69121332T DE 69121332 D1 DE69121332 D1 DE 69121332D1
- Authority
- DE
- Germany
- Prior art keywords
- followed
- temperature
- chips
- processes
- powers
- 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.)
- Revoked
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
- D21C3/02—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
- 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
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
Landscapes
- Inorganic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Paper (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Polysaccharides And Polysaccharide Derivatives (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Inorganic Insulating Materials (AREA)
- Nonmetallic Welding Materials (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Holo Graphy (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Noodles (AREA)
Abstract
Processes for preparing kraft pulp are disclosed. The processes include pretreating cellulosic material or chips with spent cooking liquor at the temperature of about 20 to 100 DEG C, followed by heating the impregnated chips at the temperature of from about 120 to 180 DEG C, followed by digestion of the lignin with white liquor, which is facilitated by using this pretreatment process.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900663A FI93866B (en) | 1990-02-09 | 1990-02-09 | Method for preparing sulphate pulp |
PCT/FI1991/000043 WO1991012368A1 (en) | 1990-02-09 | 1991-02-11 | Process for preparing kraft pulp |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69121332D1 true DE69121332D1 (en) | 1996-09-19 |
DE69121332T2 DE69121332T2 (en) | 1997-03-13 |
Family
ID=8529860
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69121332T Revoked DE69121332T2 (en) | 1990-02-09 | 1991-02-11 | METHOD FOR PRODUCING POWERS |
Country Status (14)
Country | Link |
---|---|
EP (1) | EP0468016B1 (en) |
JP (1) | JP2900091B2 (en) |
AT (1) | ATE141351T1 (en) |
AU (1) | AU639304B2 (en) |
BR (1) | BR9104333A (en) |
CA (1) | CA2049322C (en) |
DE (1) | DE69121332T2 (en) |
ES (1) | ES2091319T3 (en) |
FI (1) | FI93866B (en) |
NO (1) | NO178935C (en) |
NZ (1) | NZ236941A (en) |
PT (1) | PT96713B (en) |
WO (1) | WO1991012368A1 (en) |
ZA (1) | ZA91958B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE469842C (en) * | 1992-01-21 | 1996-01-15 | Sunds Defibrator Ind Ab | Bleaching of chemical pulp with peroxide |
NZ247276A (en) * | 1992-04-06 | 1994-12-22 | Westvaco Corp | Production of papermaking fibre of low lignin content from recycled high lignin waste paper; mixtures with fresh pulp and products produced therefrom |
FI970254A (en) | 1997-01-22 | 1998-07-23 | Ahlstrom Machinery Oy | Method and apparatus for cooking pulp |
FI20002587A (en) * | 2000-11-24 | 2002-05-25 | Metso Paper Inc | Alkaline cooking method for fibrous material |
FI20002586A (en) * | 2000-11-24 | 2002-05-25 | Metso Paper Inc | Process for alkaline batching when cooking fiber material |
KR20110123184A (en) | 2010-05-06 | 2011-11-14 | 바히아 스페셜티 셀룰로스 에스에이 | Method and system for high alpha dissolving pulp production |
AR091998A1 (en) | 2012-05-03 | 2015-03-18 | Annikki Gmbh | CELLULOSE PREPARATION PROCEDURE WITH LIGNIN LOW CONCENTRATION |
KR102143773B1 (en) * | 2018-10-25 | 2020-08-12 | 한국세라믹기술원 | Manufacturing method of porous active carbon using lignocellulose biomass and manufacturing method of the supercapacitor usig the active carbon |
KR102157512B1 (en) * | 2018-11-16 | 2020-09-18 | 한국세라믹기술원 | Manufacturing method of spherical porous active carbon using lignocellulose biomass and manufacturing method of the supercapacitor usig the porous active carbon |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE101369C1 (en) * | ||||
US1687076A (en) * | 1927-10-12 | 1928-10-09 | Venning D Simons | Process for cooking wood chips by the alkaline process of pulp manufacture |
US2639987A (en) * | 1947-07-09 | 1953-05-26 | Ass Pulp & Paper Mills | Two-stage pulping process |
US4578149A (en) * | 1981-03-05 | 1986-03-25 | Fagerlund Bertil K E | Process for digesting cellulosic material with heat recovery |
-
1990
- 1990-02-09 FI FI900663A patent/FI93866B/en not_active IP Right Cessation
-
1991
- 1991-01-30 NZ NZ236941A patent/NZ236941A/en unknown
- 1991-02-08 PT PT96713A patent/PT96713B/en not_active IP Right Cessation
- 1991-02-08 ZA ZA91958A patent/ZA91958B/en unknown
- 1991-02-11 JP JP3503756A patent/JP2900091B2/en not_active Expired - Fee Related
- 1991-02-11 AU AU72189/91A patent/AU639304B2/en not_active Ceased
- 1991-02-11 AT AT91903366T patent/ATE141351T1/en active
- 1991-02-11 WO PCT/FI1991/000043 patent/WO1991012368A1/en not_active Application Discontinuation
- 1991-02-11 BR BR919104333A patent/BR9104333A/en not_active IP Right Cessation
- 1991-02-11 ES ES91903366T patent/ES2091319T3/en not_active Expired - Lifetime
- 1991-02-11 EP EP91903366A patent/EP0468016B1/en not_active Revoked
- 1991-02-11 DE DE69121332T patent/DE69121332T2/en not_active Revoked
- 1991-02-11 CA CA002049322A patent/CA2049322C/en not_active Expired - Lifetime
- 1991-10-02 NO NO913873A patent/NO178935C/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2091319T3 (en) | 1996-11-01 |
PT96713B (en) | 2001-05-31 |
JP2900091B2 (en) | 1999-06-02 |
DE69121332T2 (en) | 1997-03-13 |
AU7218991A (en) | 1991-09-03 |
WO1991012368A1 (en) | 1991-08-22 |
CA2049322C (en) | 2002-08-20 |
FI93866B (en) | 1995-02-28 |
NO913873D0 (en) | 1991-10-02 |
FI900663A0 (en) | 1990-02-09 |
CA2049322A1 (en) | 1991-08-10 |
FI900663A (en) | 1991-08-10 |
EP0468016A1 (en) | 1992-01-29 |
NO178935B (en) | 1996-03-25 |
PT96713A (en) | 1991-10-31 |
NO178935C (en) | 2000-06-26 |
JPH04505485A (en) | 1992-09-24 |
ATE141351T1 (en) | 1996-08-15 |
NZ236941A (en) | 1993-10-26 |
EP0468016B1 (en) | 1996-08-14 |
ZA91958B (en) | 1991-11-27 |
AU639304B2 (en) | 1993-07-22 |
NO913873L (en) | 1991-10-02 |
BR9104333A (en) | 1992-04-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8363 | Opposition against the patent | ||
8331 | Complete revocation |