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YU48264B - PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASH - Google Patents

PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASH

Info

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
Application number
YU58792A
Other languages
Serbo-Croatian (sh)
Other versions
YU58792A (en
Inventor
M. Hammann
Original Assignee
Interox International (Societe Anonyme)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Interox International (Societe Anonyme) filed Critical Interox International (Societe Anonyme)
Publication of YU58792A publication Critical patent/YU58792A/en
Publication of YU48264B publication Critical patent/YU48264B/en

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.

YU58792A 1991-06-06 1992-06-05 PROCEDURE FOR BLEACHING AND REMOVING LIGNIN FROM CHEMICAL PAPER CASH YU48264B (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
DE69204457T2 (en) 1996-04-18
FI935422A0 (en) 1993-12-03
YU58792A (en) 1994-09-09
BR9206112A (en) 1995-10-10
FI935422A (en) 1994-01-11
JPH06507683A (en) 1994-09-01
EP0587822A1 (en) 1994-03-23
ES2079209T3 (en) 1996-01-01
DE69204457D1 (en) 1995-10-05
NZ242996A (en) 1995-01-27
ZA924021B (en) 1993-02-24
WO1992021814A1 (en) 1992-12-10
NO302129B1 (en) 1998-01-26
AR247257A1 (en) 1994-11-30
ATE127179T1 (en) 1995-09-15
AU651462B2 (en) 1994-07-21
AU1877592A (en) 1993-01-08
NO934406D0 (en) 1993-12-03
CA2110698A1 (en) 1992-12-10
EP0587822B1 (en) 1995-08-30
BE1004974A3 (en) 1993-03-09
NO934406L (en) 1994-01-26

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