FI132674A - - Google Patents
Info
- Publication number
- FI132674A FI132674A FI1326/74A FI132674A FI132674A FI 132674 A FI132674 A FI 132674A FI 1326/74 A FI1326/74 A FI 1326/74A FI 132674 A FI132674 A FI 132674A FI 132674 A FI132674 A FI 132674A
- Authority
- FI
- Finland
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
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2327900A DE2327900C3 (en) | 1973-06-01 | 1973-06-01 | Bleaching of cellulose with considerably reduced use of chlorine |
| DE2327900 | 1973-06-01 | ||
| ZA7507622 | 1975-12-04 | ||
| ZA757622A ZA757622B (en) | 1973-06-01 | 1975-12-04 | Bleaching process for wood pulp with the use of considerably reduced amounts of chlorine |
| CH1587875 | 1975-12-05 | ||
| CH1587875A CH618487A5 (en) | 1973-06-01 | 1975-12-05 | Multiple-stage process for the low-chlorine complete bleaching of wood pulp |
| FR7628206A FR2364999A1 (en) | 1973-06-01 | 1976-09-20 | Bleaching of cellulose pulps with reduced chlorine use - involving an initial degradation stage using strongly alkaline peroxide |
| FR7628206 | 1976-09-20 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| FI132674A true FI132674A (en) | 1974-12-02 |
| FI62361B FI62361B (en) | 1982-08-31 |
| FI62361C FI62361C (en) | 1982-12-10 |
Family
ID=27429620
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FI1326/74A FI62361C (en) | 1973-06-01 | 1974-04-30 | BLEKNING AV CELLULOSA MED EN AVSEVAERT REDUCERAD KLORMAENGD |
Country Status (9)
| Country | Link |
|---|---|
| AT (1) | AT334732B (en) |
| BE (1) | BE836358A (en) |
| CA (1) | CA1055656A (en) |
| CH (1) | CH618487A5 (en) |
| DE (1) | DE2327900C3 (en) |
| FI (1) | FI62361C (en) |
| FR (1) | FR2364999A1 (en) |
| SE (1) | SE415674B (en) |
| ZA (1) | ZA757622B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2327900C3 (en) * | 1973-06-01 | 1985-02-07 | Degussa Ag, 6000 Frankfurt | Bleaching of cellulose with considerably reduced use of chlorine |
| DE2538673C2 (en) * | 1975-08-30 | 1986-01-16 | Degussa Ag, 6000 Frankfurt | Bleaching of cellulose with considerably reduced use of chlorine |
| BE869153A (en) * | 1977-07-29 | 1979-01-22 | Ugine Kuhlmann | PROCESS FOR THE MANUFACTURE OF CHEMICAL PAPER PULP |
| DE2841013C2 (en) * | 1978-09-21 | 1984-06-07 | Degussa Ag, 6000 Frankfurt | Process for full bleaching of pulp |
| US9631316B2 (en) * | 2012-12-31 | 2017-04-25 | Api Intellectual Property Holdings, Llc | Biomass fractionation processes employing sulfur dioxide |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2527563A (en) * | 1947-08-13 | 1950-10-31 | Buffalo Electro Chem Co | Method of bleaching semichemical pulps |
| FR1118216A (en) * | 1954-02-02 | 1956-06-01 | I Ab | Half-cellulose bleaching process |
| DE2327900C3 (en) * | 1973-06-01 | 1985-02-07 | Degussa Ag, 6000 Frankfurt | Bleaching of cellulose with considerably reduced use of chlorine |
-
1973
- 1973-06-01 DE DE2327900A patent/DE2327900C3/en not_active Expired
-
1974
- 1974-04-30 FI FI1326/74A patent/FI62361C/en active
- 1974-05-31 SE SE7407273A patent/SE415674B/en not_active IP Right Cessation
- 1974-05-31 CA CA201,323A patent/CA1055656A/en not_active Expired
- 1974-05-31 AT AT452974A patent/AT334732B/en not_active IP Right Cessation
-
1975
- 1975-12-04 ZA ZA757622A patent/ZA757622B/en unknown
- 1975-12-05 CH CH1587875A patent/CH618487A5/en not_active IP Right Cessation
- 1975-12-05 BE BE6045281A patent/BE836358A/en not_active IP Right Cessation
-
1976
- 1976-09-20 FR FR7628206A patent/FR2364999A1/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| DE2327900B2 (en) | 1978-08-03 |
| FR2364999B1 (en) | 1979-01-12 |
| BE836358A (en) | 1976-04-01 |
| ZA757622B (en) | 1976-11-24 |
| FI62361C (en) | 1982-12-10 |
| ATA452974A (en) | 1976-05-15 |
| DE2327900C3 (en) | 1985-02-07 |
| FI62361B (en) | 1982-08-31 |
| CA1055656A (en) | 1979-06-05 |
| CH618487A5 (en) | 1980-07-31 |
| SE7407273L (en) | 1974-12-02 |
| DE2327900A1 (en) | 1975-01-02 |
| SE415674B (en) | 1980-10-20 |
| AT334732B (en) | 1976-02-10 |
| FR2364999A1 (en) | 1978-04-14 |