FI45574B - - Google Patents
Info
- Publication number
- FI45574B FI45574B FI1311/70A FI131170A FI45574B FI 45574 B FI45574 B FI 45574B FI 1311/70 A FI1311/70 A FI 1311/70A FI 131170 A FI131170 A FI 131170A FI 45574 B FI45574 B FI 45574B
- 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)
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI701311A FI45574C (sv) | 1970-05-11 | 1970-05-11 | Förfarande för blekning av cellulosahaltiga material. |
DE2040763A DE2040763C3 (de) | 1970-05-11 | 1970-08-17 | Verfahren zum Bleichen und Delignifieren eines zellulosehaltlgen Stoffes |
ZA712989A ZA712989B (en) | 1970-05-11 | 1971-05-07 | Process for bleaching cellulose-containing materials |
CA112,573A CA946107A (en) | 1970-05-11 | 1971-05-10 | Process for bleaching cellulose-containing materials |
NO1752/71A NO127205B (sv) | 1970-05-11 | 1971-05-10 | |
BR2828/71A BR7102828D0 (pt) | 1970-05-11 | 1971-05-11 | Processo para o alojamento e deslinhificacao de material que contem celulose |
SE7106108A SE373396B (sv) | 1970-05-11 | 1971-05-11 | Forfarande vid blekning och delignifiering av cellulosahaltigt material i alkalisk losning med anvendning av syre eller fritt syre innehallande gas och sedan peroxid som ett andra blekningssteg |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI701311A FI45574C (sv) | 1970-05-11 | 1970-05-11 | Förfarande för blekning av cellulosahaltiga material. |
Publications (2)
Publication Number | Publication Date |
---|---|
FI45574B true FI45574B (sv) | 1972-04-04 |
FI45574C FI45574C (sv) | 1972-07-10 |
Family
ID=8505417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FI701311A FI45574C (sv) | 1970-05-11 | 1970-05-11 | Förfarande för blekning av cellulosahaltiga material. |
Country Status (7)
Country | Link |
---|---|
BR (1) | BR7102828D0 (sv) |
CA (1) | CA946107A (sv) |
DE (1) | DE2040763C3 (sv) |
FI (1) | FI45574C (sv) |
NO (1) | NO127205B (sv) |
SE (1) | SE373396B (sv) |
ZA (1) | ZA712989B (sv) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE373395B (sv) * | 1972-12-19 | 1975-02-03 | Mo Och Domsjoe Ab | Forfarande for framstellning av cellulosamassa med hog ljushet genom uppslutning av ved med syrgas under tryck i nervaro av en kokvetska forsatt med basiska neutralisationsmedel |
SE420430B (sv) * | 1978-02-17 | 1981-10-05 | Mo Och Domsjoe Ab | Forfarande for blekning och extraktion av lignocellulosahaltig material med peroxidhaltiga blekmedel |
US4372812A (en) * | 1978-04-07 | 1983-02-08 | International Paper Company | Chlorine free process for bleaching lignocellulosic pulp |
US4410397A (en) | 1978-04-07 | 1983-10-18 | International Paper Company | Delignification and bleaching process and solution for lignocellulosic pulp with peroxide in the presence of metal additives |
FR2457339A1 (fr) * | 1979-05-25 | 1980-12-19 | Interox | Procede pour la delignification et le blanchiment de pates cellulosiques chimiques et semi-chimiques |
DE3207157C1 (de) * | 1982-02-27 | 1983-06-09 | Degussa Ag, 6000 Frankfurt | Verfahren zur Herstellung von halbgebleichten Zellstoffen |
FR2566015B1 (fr) * | 1984-06-15 | 1986-08-29 | Centre Tech Ind Papier | Procede de blanchiment de pate mecanique par le peroxyde d'hydrogene |
DE3428352A1 (de) * | 1984-08-01 | 1986-02-13 | Degussa Ag, 6000 Frankfurt | Verfahren zur delignifizierung und bleiche von zellstoffen |
DE3802401A1 (de) * | 1988-01-28 | 1989-08-03 | Degussa | Verfahren zur herstellung von halbgebleichtem kraftzellstoff |
FI89516B (fi) | 1989-05-10 | 1993-06-30 | Ahlstroem Oy | Foerfarande foer blekning av cellulosamassa med otson |
ES2038097T5 (es) * | 1989-06-06 | 2001-05-01 | Eka Chemicals Ab | Procedimiento para blanquear pastas papeleras que contienen lignocelulosa. |
SE466061B (sv) * | 1990-04-23 | 1991-12-09 | Eka Nobel Ab | Blekning av kemisk massa genom behandling med foerst ett komplexbildande aemne och sedan ett peroxidinnehaallande aemne |
SE9001481L (sv) * | 1990-04-23 | 1991-10-24 | Eka Nobel Ab | Reduktion av halogenorganiska foereningar i blekeriavlopp |
SE9301960L (sv) * | 1993-06-08 | 1994-07-25 | Kvaerner Pulping Tech | Blekning av kemisk massa med peroxid vid övertryck |
WO1997027358A2 (en) * | 1995-12-07 | 1997-07-31 | Beloit Technologies, Inc. | Oxygen delignification of medium consistency pulp slurry |
US6375797B1 (en) * | 1996-06-20 | 2002-04-23 | Andritz-Ahlstrom Oy | Bleaching chemical pulp in a PkDQ-Po Sequence |
BE1011129A4 (fr) * | 1997-04-25 | 1999-05-04 | Solvay Interox | Procede continu de delignification et/ou de blanchiment de pate a papier chimique vierge ou recyclee. |
-
1970
- 1970-05-11 FI FI701311A patent/FI45574C/sv active
- 1970-08-17 DE DE2040763A patent/DE2040763C3/de not_active Expired
-
1971
- 1971-05-07 ZA ZA712989A patent/ZA712989B/xx unknown
- 1971-05-10 NO NO1752/71A patent/NO127205B/no unknown
- 1971-05-10 CA CA112,573A patent/CA946107A/en not_active Expired
- 1971-05-11 BR BR2828/71A patent/BR7102828D0/pt unknown
- 1971-05-11 SE SE7106108A patent/SE373396B/sv unknown
Also Published As
Publication number | Publication date |
---|---|
CA946107A (en) | 1974-04-30 |
BR7102828D0 (pt) | 1973-05-03 |
FI45574C (sv) | 1972-07-10 |
DE2040763B2 (sv) | 1975-02-20 |
DE2040763A1 (de) | 1971-11-18 |
ZA712989B (en) | 1972-01-26 |
DE2040763C3 (de) | 1975-10-02 |
SE373396B (sv) | 1975-02-03 |
NO127205B (sv) | 1973-05-21 |