NO862116L - TREMASS CHARACTERIZATION UNDER PRESSURE AND CHLORINE INTRODUCTION IN TORQUE Bubbles. - Google Patents
TREMASS CHARACTERIZATION UNDER PRESSURE AND CHLORINE INTRODUCTION IN TORQUE Bubbles.Info
- Publication number
- NO862116L NO862116L NO862116A NO862116A NO862116L NO 862116 L NO862116 L NO 862116L NO 862116 A NO862116 A NO 862116A NO 862116 A NO862116 A NO 862116A NO 862116 L NO862116 L NO 862116L
- Authority
- NO
- Norway
- Prior art keywords
- mixer
- treatment
- chlorine
- pulp
- chlorine gas
- 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
- 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
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
Abstract
A method and apparatus are provided for increasing the efficiency of treatment of a paper pulp slurry with chlorine gas, such as in the bleaching or delignification of deciduous wood chemical pulps, coniferous wood chemical pulps, and non-wood fibrous chemical pulps. Chlorine gas is intimately mixed with the pulp in a fluidizing mixer (14), the pulp preferably having a consistency of about 7-12%, and then is passed to a retention vessel (20). The discharge of pulp from the mixer to the retention vessel, and from the retention vessel to other treatment structures, is throttled by valves (30, 31) so as to increase the pressure in both the mixer and the retention vessel to above atmospheric, and preferably in the range of about 15-150 psig (1 to 10 bar above atmospheric pressure). The chlorine gas is added to the mixer through one more discs (53) of porous materials having pore sizes in the range of about 5-175 microns, such as porous ceramic or sintered metal discs. The increased pressure during the chlorine treatment, and the introduction of the chlorine gas in the form of minute bubbles, improve the solubility of the chlorine in the pulp slurry and thereby increase the efficiency of treatment. (Figure 1).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US74467885A | 1985-06-14 | 1985-06-14 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| NO862116L true NO862116L (en) | 1986-12-15 |
| NO168123B NO168123B (en) | 1991-10-07 |
| NO168123C NO168123C (en) | 1992-01-15 |
Family
ID=24993592
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO862116A NO168123C (en) | 1985-06-14 | 1986-05-28 | PROCEDURE AND APPARATUS FOR TREATING FINE DISTRIBUTED FIBER-containing CELLULOS MATERIALS WITH CHLORGE GAS |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP0207062B1 (en) |
| JP (1) | JPS61289192A (en) |
| AT (1) | ATE48452T1 (en) |
| BR (1) | BR8602738A (en) |
| CA (1) | CA1276408C (en) |
| DE (1) | DE3667310D1 (en) |
| FI (1) | FI85728C (en) |
| NO (1) | NO168123C (en) |
| SE (1) | SE466459B (en) |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US56833A (en) * | 1866-07-31 | Improvement in bleaching paper-stock | ||
| US1971241A (en) * | 1933-04-01 | 1934-08-21 | Pennsylvania Salt Mfg Co | Method of chlorination |
| DE1621684A1 (en) * | 1967-10-04 | 1971-07-08 | Bellmer Geb Kg Maschf | Machine combination for the line section in pulp processing plants |
| SE387671B (en) * | 1973-04-27 | 1976-09-13 | Mo Och Domsjoe Ab | COMPACT WHITE BLEACHING, NON-FLUFFAT LIQUID LIGNOCELLULOSE MATERIAL WITH GASY BLEACHING, PREFERABLY ACID GAS |
-
1985
- 1985-10-25 CA CA000493830A patent/CA1276408C/en not_active Expired - Fee Related
-
1986
- 1986-05-19 FI FI862082A patent/FI85728C/en not_active IP Right Cessation
- 1986-05-28 NO NO862116A patent/NO168123C/en unknown
- 1986-06-04 JP JP61128270A patent/JPS61289192A/en active Pending
- 1986-06-06 AT AT86890168T patent/ATE48452T1/en not_active IP Right Cessation
- 1986-06-06 DE DE8686890168T patent/DE3667310D1/en not_active Expired - Fee Related
- 1986-06-06 EP EP86890168A patent/EP0207062B1/en not_active Expired
- 1986-06-10 SE SE8602592A patent/SE466459B/en not_active IP Right Cessation
- 1986-06-11 BR BR8602738A patent/BR8602738A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61289192A (en) | 1986-12-19 |
| EP0207062B1 (en) | 1989-12-06 |
| ATE48452T1 (en) | 1989-12-15 |
| SE466459B (en) | 1992-02-17 |
| NO168123B (en) | 1991-10-07 |
| CA1276408C (en) | 1990-11-20 |
| FI862082A (en) | 1986-12-15 |
| SE8602592L (en) | 1986-12-15 |
| NO168123C (en) | 1992-01-15 |
| SE8602592D0 (en) | 1986-06-10 |
| DE3667310D1 (en) | 1990-01-11 |
| FI862082A0 (en) | 1986-05-19 |
| FI85728B (en) | 1992-02-14 |
| FI85728C (en) | 1992-05-25 |
| BR8602738A (en) | 1987-02-10 |
| EP0207062A1 (en) | 1986-12-30 |
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