YU48264B - PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASH - Google Patents
PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASHInfo
- Publication number
- YU48264B YU48264B YU58792A YU58792A YU48264B YU 48264 B YU48264 B YU 48264B YU 58792 A YU58792 A YU 58792A YU 58792 A YU58792 A YU 58792A YU 48264 B YU48264 B YU 48264B
- Authority
- YU
- Yugoslavia
- Prior art keywords
- mass
- temperature
- bleaching
- processing
- chemical paper
- 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
- D21C9/1057—Multistage, with compounds cited in more than one sub-group D21C9/10, D21C9/12, D21C9/16
-
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
-
- 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
- D21C9/147—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications
- D21C9/153—Bleaching ; Apparatus therefor with oxygen or its allotropic modifications with ozone
-
- 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
- D21C9/16—Bleaching ; Apparatus therefor with per compounds
- D21C9/166—Bleaching ; Apparatus therefor with per compounds with peracids
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Abstract
POSTUPAK ZA BELJENJE I UKLANJANJE LIGNINA IZ HEMIJSKIH PAPIRNIH KASA naznačen time, što se u prvoj fazi sirova kaša obradjuje gasovitim kiseonikom, pri čemu se obrada odvija pri pritisku od 20 do 1000 kPa, na temperaturi od 70-130В°C i u trajanju od 30 do 180 min, pri čemu se dodaje alkalno jedinjenje birano od hidroksida i karbonata alkalnih ili zemnoalkalnih metala, sa donjom graničnom pH vrednošću od 7, a masa korišćenih alkalija u odnosu na masu čvrstih sastojaka iznosi izmedju 0,5 i 4%, i što se u drugoj i trećoj fazi kaša dobijena u prvoj fazi obradjuje, po proizvoljnom redosledu, gasovitim ozonom, pri čemu se obrada ozonom vrši u prisustvu kiseline kao što je rastvor SO2 pri pH u opsegu od 0,5 do 5, u trajanju od 3 do 80 min, na temperaturi od 2 do 50В°C, a gustina u ovoj fazi obrade je od 0,4 do 45% mas. suve materije, i monopersumpornom kiselinom ili nekom od njenih soli, pri čemu se ta obrada vrši pri pH vrednosti od 0,5 pa do pH 12, u trajanju od 30 do 150 min i na temperaturi od 50 do 100В°C, a pri gustini kaše od 5 do 25% mas. suve materije. - Prijava sadrži još 9 zavisnih zahteva.PROCESS FOR BLEACHING AND REMOVAL OF LIGNINE FROM CHEMICAL PAPER CASES characterized in that in the first phase the raw porridge is treated with gaseous oxygen, where the processing takes place at a pressure of 20 to 1000 kPa, at a temperature of 70-130V ° C and for a period of 30 to 180 min, adding an alkaline compound selected from alkali or alkaline earth metal hydroxides and carbonates, with a lower pH limit of 7, and the mass of alkali used in relation to the mass of solids is between 0.5 and 4%, and which in in the second and third stages, the slurry obtained in the first stage is treated, in any order, with ozone gas, the ozone treatment being carried out in the presence of an acid such as a SO2 solution at pH in the range of 0.5 to 5, for 3 to 80 minutes. , at a temperature of 2 to 50V ° C, and the density at this stage of processing is from 0.4 to 45% of the mass. dry matter, and monopersulphuric acid or one of its salts, where this processing is carried out at a pH of 0.5 to pH 12, for 30 to 150 min and at a temperature of 50 to 100V ° C, and at a density porridge from 5 to 25% of the mass. dry matter. - The application contains 9 more dependent requests.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE9100549A BE1004974A3 (en) | 1991-06-06 | 1991-06-06 | Method for laundering and pasta delignification paper chemicals and application this method of laundering and the delignification of kraft pulp and pulp asam. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| YU58792A YU58792A (en) | 1994-09-09 |
| YU48264B true YU48264B (en) | 1997-09-30 |
Family
ID=3885547
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| YU58792A YU48264B (en) | 1991-06-06 | 1992-06-05 | PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASH |
Country Status (16)
| Country | Link |
|---|---|
| EP (1) | EP0587822B1 (en) |
| JP (1) | JPH06507683A (en) |
| AR (1) | AR247257A1 (en) |
| AT (1) | ATE127179T1 (en) |
| AU (1) | AU651462B2 (en) |
| BE (1) | BE1004974A3 (en) |
| BR (1) | BR9206112A (en) |
| CA (1) | CA2110698A1 (en) |
| DE (1) | DE69204457T2 (en) |
| ES (1) | ES2079209T3 (en) |
| FI (1) | FI935422A (en) |
| NO (1) | NO302129B1 (en) |
| NZ (1) | NZ242996A (en) |
| WO (1) | WO1992021814A1 (en) |
| YU (1) | YU48264B (en) |
| ZA (1) | ZA924021B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1006881A3 (en) * | 1993-03-02 | 1995-01-17 | Solvay Interox | Method for delignification of chemical pulp. |
| SE506480C2 (en) * | 1995-06-29 | 1997-12-22 | Sca Graphic Res Ab | Bleaching of lignocellulosic fibrous material with ozone and peracid in a combination step |
| US5770011A (en) * | 1995-11-17 | 1998-06-23 | International Paper Company | Neutral monoperoxysulfate bleaching process |
| FI964715A (en) * | 1996-11-26 | 1998-05-27 | Keskuslaboratorio | Method for bleaching cellulose pulp |
| EP0931874A1 (en) * | 1998-01-22 | 1999-07-28 | Degussa-Hüls Aktiengesellschaft | Pulp bleaching process including final stage treatment step with salt of peroxymonosulfuric acid |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4372812A (en) * | 1978-04-07 | 1983-02-08 | International Paper Company | Chlorine free process for bleaching lignocellulosic pulp |
| US5091054A (en) * | 1989-08-18 | 1992-02-25 | Degussa Corporation | Process for bleaching and delignification of lignocellulosic |
-
1991
- 1991-06-06 BE BE9100549A patent/BE1004974A3/en not_active IP Right Cessation
-
1992
- 1992-06-01 BR BR9206112A patent/BR9206112A/en not_active Application Discontinuation
- 1992-06-01 AU AU18775/92A patent/AU651462B2/en not_active Ceased
- 1992-06-01 EP EP92924472A patent/EP0587822B1/en not_active Expired - Lifetime
- 1992-06-01 ES ES92924472T patent/ES2079209T3/en not_active Expired - Fee Related
- 1992-06-01 DE DE69204457T patent/DE69204457T2/en not_active Expired - Fee Related
- 1992-06-01 WO PCT/EP1992/001222 patent/WO1992021814A1/en active IP Right Grant
- 1992-06-01 CA CA002110698A patent/CA2110698A1/en not_active Abandoned
- 1992-06-01 JP JP4510141A patent/JPH06507683A/en active Pending
- 1992-06-01 AT AT92924472T patent/ATE127179T1/en not_active IP Right Cessation
- 1992-06-02 AR AR92322455A patent/AR247257A1/en active
- 1992-06-02 ZA ZA924021A patent/ZA924021B/en unknown
- 1992-06-03 NZ NZ242996A patent/NZ242996A/en unknown
- 1992-06-05 YU YU58792A patent/YU48264B/en unknown
-
1993
- 1993-12-03 NO NO934406A patent/NO302129B1/en unknown
- 1993-12-03 FI FI935422A patent/FI935422A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06507683A (en) | 1994-09-01 |
| AU1877592A (en) | 1993-01-08 |
| AU651462B2 (en) | 1994-07-21 |
| ATE127179T1 (en) | 1995-09-15 |
| AR247257A1 (en) | 1994-11-30 |
| FI935422A0 (en) | 1993-12-03 |
| DE69204457D1 (en) | 1995-10-05 |
| BE1004974A3 (en) | 1993-03-09 |
| DE69204457T2 (en) | 1996-04-18 |
| NO934406D0 (en) | 1993-12-03 |
| ZA924021B (en) | 1993-02-24 |
| BR9206112A (en) | 1995-10-10 |
| NZ242996A (en) | 1995-01-27 |
| WO1992021814A1 (en) | 1992-12-10 |
| ES2079209T3 (en) | 1996-01-01 |
| FI935422A (en) | 1994-01-11 |
| CA2110698A1 (en) | 1992-12-10 |
| NO302129B1 (en) | 1998-01-26 |
| EP0587822A1 (en) | 1994-03-23 |
| YU58792A (en) | 1994-09-09 |
| EP0587822B1 (en) | 1995-08-30 |
| NO934406L (en) | 1994-01-26 |
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