SE421713B - Tvastegsforfarande for framstellning av sulfitmassa - Google Patents
Tvastegsforfarande for framstellning av sulfitmassaInfo
- Publication number
- SE421713B SE421713B SE7510677A SE7510677A SE421713B SE 421713 B SE421713 B SE 421713B SE 7510677 A SE7510677 A SE 7510677A SE 7510677 A SE7510677 A SE 7510677A SE 421713 B SE421713 B SE 421713B
- Authority
- SE
- Sweden
- Prior art keywords
- sulfit
- preparation
- step procedure
- procedure
- sulfit preparation
- 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
- D21C3/22—Other features of pulping processes
- D21C3/26—Multistage processes
- D21C3/266—Multistage processes the same pulping agent being used in all stages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S162/00—Paper making and fiber liberation
- Y10S162/02—Chip soaking
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19742445523 DE2445523A1 (de) | 1974-09-24 | 1974-09-24 | Verfahren zur herstellung von zellstoff |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7510677L SE7510677L (sv) | 1976-03-25 |
| SE421713B true SE421713B (sv) | 1982-01-25 |
Family
ID=5926572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7510677A SE421713B (sv) | 1974-09-24 | 1975-09-23 | Tvastegsforfarande for framstellning av sulfitmassa |
Country Status (14)
| Country | Link |
|---|---|
| US (1) | US4141787A (sv) |
| AT (1) | AT351358B (sv) |
| BE (1) | BE833712A (sv) |
| DE (1) | DE2445523A1 (sv) |
| DK (1) | DK141450C (sv) |
| FI (1) | FI59629C (sv) |
| FR (1) | FR2286233A1 (sv) |
| GB (1) | GB1527607A (sv) |
| IE (1) | IE42219B1 (sv) |
| IT (1) | IT1056128B (sv) |
| LU (1) | LU73439A1 (sv) |
| NL (1) | NL7511238A (sv) |
| NO (1) | NO147390C (sv) |
| SE (1) | SE421713B (sv) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4307660C1 (de) * | 1993-03-11 | 1994-08-04 | Feldmuehle Ag Stora | Herstellung chemo-mechanischer und/oder chemo-thermo-mechanischer Holzstoffe |
| PT101999B (pt) * | 1997-04-28 | 2003-09-30 | Joao Manuel Almeida Oliveira B | Processo quimico de deslenhificacao da madeira utilizando como reagente activo o composto - bissulfito duplo de magnesio e amonio |
| CN112726252B (zh) * | 2020-11-30 | 2022-11-25 | 山东华泰纸业股份有限公司 | 一种造纸厂废渣的综合利用方法 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE564738C (de) * | 1931-01-09 | 1932-11-23 | Patentaktiebolaget Groendal Ra | Verfahren zur Herstellung von Sulfitzellstoff |
| US2192239A (en) * | 1937-12-07 | 1940-03-05 | Weyerhaeuser Timber Co | Process of digesting wood or other ligno-cellulose materials |
| BE496841A (sv) * | 1949-07-12 | |||
| US2859108A (en) * | 1953-05-27 | 1958-11-04 | Rosenblads Patenter Ab | Method for preparing digestion acid for digestion of sulphite |
| US3046182A (en) * | 1956-01-13 | 1962-07-24 | Smith Paper Mills Ltd Howard | Sulphite pulping process |
| US3067086A (en) * | 1959-09-15 | 1962-12-04 | Columbia Cellulose Company Ltd | Pulping process |
| DE1198666B (de) * | 1961-10-20 | 1965-08-12 | Metallgesellschaft Ag | Verfahren zur Erzeugung von Zellstoff |
| US3383277A (en) * | 1967-02-06 | 1968-05-14 | Scott Paper Co | Two-stage pulping process with an isothermal first stage |
-
1974
- 1974-09-24 DE DE19742445523 patent/DE2445523A1/de active Pending
-
1975
- 1975-09-16 US US05/613,907 patent/US4141787A/en not_active Expired - Lifetime
- 1975-09-22 LU LU73439A patent/LU73439A1/xx unknown
- 1975-09-23 BE BE160287A patent/BE833712A/xx not_active IP Right Cessation
- 1975-09-23 NO NO753228A patent/NO147390C/no unknown
- 1975-09-23 FI FI752659A patent/FI59629C/fi not_active IP Right Cessation
- 1975-09-23 AT AT728875A patent/AT351358B/de not_active IP Right Cessation
- 1975-09-23 DK DK425975A patent/DK141450C/da not_active IP Right Cessation
- 1975-09-23 SE SE7510677A patent/SE421713B/sv not_active IP Right Cessation
- 1975-09-24 FR FR7529295A patent/FR2286233A1/fr active Granted
- 1975-09-24 IT IT51494/75A patent/IT1056128B/it active
- 1975-09-24 IE IE2092/75A patent/IE42219B1/en unknown
- 1975-09-24 GB GB29158/75A patent/GB1527607A/en not_active Expired
- 1975-09-24 NL NL7511238A patent/NL7511238A/xx not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| NO753228L (sv) | 1976-03-25 |
| FR2286233B1 (sv) | 1981-04-30 |
| ATA728875A (de) | 1978-12-15 |
| LU73439A1 (sv) | 1976-04-13 |
| NO147390B (no) | 1982-12-20 |
| FI59629B (fi) | 1981-05-29 |
| IE42219B1 (en) | 1980-07-02 |
| US4141787A (en) | 1979-02-27 |
| DK141450C (da) | 1980-09-29 |
| FR2286233A1 (fr) | 1976-04-23 |
| IE42219L (en) | 1976-03-24 |
| NO147390C (no) | 1983-03-30 |
| BE833712A (fr) | 1976-01-16 |
| GB1527607A (en) | 1978-10-04 |
| DK425975A (da) | 1976-03-25 |
| DK141450B (da) | 1980-03-17 |
| SE7510677L (sv) | 1976-03-25 |
| NL7511238A (nl) | 1976-03-26 |
| AT351358B (de) | 1979-07-25 |
| FI59629C (fi) | 1981-09-10 |
| FI752659A (sv) | 1976-03-25 |
| DE2445523A1 (de) | 1976-04-01 |
| IT1056128B (it) | 1982-01-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| NUG | Patent has lapsed |
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