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ES2089567T3 - A METHOD FOR PASTA WHITENING WITH OZONE. - Google Patents

A METHOD FOR PASTA WHITENING WITH OZONE.

Info

Publication number
ES2089567T3
ES2089567T3 ES92920388T ES92920388T ES2089567T3 ES 2089567 T3 ES2089567 T3 ES 2089567T3 ES 92920388 T ES92920388 T ES 92920388T ES 92920388 T ES92920388 T ES 92920388T ES 2089567 T3 ES2089567 T3 ES 2089567T3
Authority
ES
Spain
Prior art keywords
ozone
solution
sodium
essential
cellulose pulp
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES92920388T
Other languages
Spanish (es)
Inventor
Rolf Carl August Brannland
Sture Erik Olof Noreus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mo och Domsjo AB
Original Assignee
Mo och Domsjo AB
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 Mo och Domsjo AB filed Critical Mo och Domsjo AB
Application granted granted Critical
Publication of ES2089567T3 publication Critical patent/ES2089567T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • D21C11/00—Regeneration of pulp liquors or effluent waste waters
    • D21C11/0021—Introduction of various effluents, e.g. waste waters, into the pulping, recovery and regeneration cycle (closed-cycle)
    • 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

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Paper (AREA)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Detergent Compositions (AREA)

Abstract

CUANDO SE CONCLUYE UN PROCESO DE FABRICACION DE PULPA DE CELULOSA DE ALTA CLARIDAD, ES DECIR INCLUYENDO LA RECUPERACION DE PRACTICAMENTE TODO EL JUGO DE DESECHO, HAY UN ENRIQUECIMIENTO INSOSTENIBLE DE CIERTOS ELEMENTOS BASICOS, TALES COMO EL SODIO Y EL AZUFRE. EL PRESENTE INVENTO PROPORCIONA UNA SOLUCION PARCIAL A ESTE PROBLEMA Y ESTA RELACIONADA CON UN METODO DE BLANQUEO CON MATERIAL LIGNOCELULOSICO DE OZONO (PULPA DE CELULOSA) QUE HA SIDO FABRICADO QUIMICAMENTE, AL MENOS PARCIALMENTE, EN PRESENCIA DE AGUA CON UN GRADO DE ACIDEZ, EXPRESADO COMO PH, DE 2 NE DURANTE EL PROCESO DE BLANQUEO AL OZONO, AÑADIENDO UNA SOLUCION DE ACIDO SULFURICO O UNA SOLUCION ACIDA DE SULFATO DE SODIO PRODUCIDA POR ELECTROLISIS (O ELECTRODIALISIS) DE UNA SOLUCION DE SULFATO DE SODIO ESENCIALMENTE NEUTRA, OBTENIDA RECICLANDO PRODUCTOS QUIMICOS EN UN SISTEMA AL QUE SE AÑADE LA SOLUCION RESTANTE (JUGOS DE DESECHO) DEL PROCESO DE BLANQUEO AL OZONO.WHEN A HIGH CLARITY CELLULOSE PULP MANUFACTURING PROCESS IS CONCLUDED, THAT IS, INCLUDING THE RECOVERY OF PRACTICALLY ALL THE WASTE JUICE, THERE IS AN UNSUSTAINABLE ENRICHMENT OF CERTAIN BASIC ELEMENTS, SUCH AS SODIUM AND SODIUM. THE PRESENT INVENTION PROVIDES A PARTIAL SOLUTION TO THIS PROBLEM AND IS RELATED TO A BLEACHING METHOD WITH LIGNOCELLULOSIC OZONE MATERIAL (CELLULOSE PULP) THAT HAS BEEN MADE CHEMICALLY, AT LEAST PARTIALLY, IN THE PRESENCE OF WATER TO A DEGREE OF A PH, DE 2 NE DURING THE OZONE BLEACHING PROCESS, ADDING A SOLUTION OF SULFURIC ACID OR AN ACID SOLUTION OF SODIUM SULPHATE PRODUCED BY ELECTROLYSIS (OR ELECTRODIALISIS), ESSENTIAL ESSENTIAL ESSENTIAL SOLUTION SYSTEM TO WHICH THE REMAINING SOLUTION (WASTE JUICES) OF THE BLEACHING PROCESS TO THE OZONE IS ADDED.

ES92920388T 1991-09-17 1992-09-16 A METHOD FOR PASTA WHITENING WITH OZONE. Expired - Lifetime ES2089567T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9102693A SE500053C2 (en) 1991-09-17 1991-09-17 Ozone bleaching whereby the pulp is acidified with sulfuric acid produced by electrolysis

Publications (1)

Publication Number Publication Date
ES2089567T3 true ES2089567T3 (en) 1996-10-01

Family

ID=20383749

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92920388T Expired - Lifetime ES2089567T3 (en) 1991-09-17 1992-09-16 A METHOD FOR PASTA WHITENING WITH OZONE.

Country Status (10)

Country Link
EP (1) EP0605565B1 (en)
AT (1) ATE138989T1 (en)
AU (1) AU657003B2 (en)
CA (1) CA2116974A1 (en)
DE (1) DE69211351T2 (en)
ES (1) ES2089567T3 (en)
FI (1) FI941238A0 (en)
PT (1) PT100870B (en)
SE (1) SE500053C2 (en)
WO (1) WO1993006297A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE9704298L (en) * 1997-11-24 1999-05-25 Kvaerner Pulping Tech Procedure for bleaching cellulose in a closed system using Caro's acid
KR101815677B1 (en) * 2011-07-26 2018-01-30 롯데정밀화학 주식회사 Method for removing the chromaticity of cellulose and its derivatives
DE102013100997A1 (en) 2013-01-31 2014-07-31 Thyssenkrupp Resource Technologies Gmbh 1; 2 Method and plant for grinding lumpy starting material
CN115490372A (en) * 2021-06-17 2022-12-20 中国石油化工股份有限公司 Method and system for treating black liquor produced by pulping waste cotton

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS503990B1 (en) * 1969-02-19 1975-02-13
NO144711C (en) * 1978-04-04 1981-10-21 Myrens Verksted As PROCEDURE FOR BLACKING OXYGEN-EQUIVALIZED CELLULOSE-containing OZONE

Also Published As

Publication number Publication date
PT100870A (en) 1994-01-31
SE500053C2 (en) 1994-03-28
PT100870B (en) 1999-07-30
FI941238A7 (en) 1994-03-16
DE69211351D1 (en) 1996-07-11
ATE138989T1 (en) 1996-06-15
FI941238L (en) 1994-03-16
EP0605565A1 (en) 1994-07-13
EP0605565B1 (en) 1996-06-05
AU657003B2 (en) 1995-02-23
SE9102693D0 (en) 1991-09-17
DE69211351T2 (en) 1997-01-23
SE9102693L (en) 1993-03-18
AU2663192A (en) 1993-04-27
CA2116974A1 (en) 1993-04-01
FI941238A0 (en) 1994-03-16
WO1993006297A1 (en) 1993-04-01

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