ES2085614T3 - Blanqueo por ozono con consistencia media. - Google Patents

Blanqueo por ozono con consistencia media.

Info

Publication number
ES2085614T3
ES2085614T3 ES92890136T ES92890136T ES2085614T3 ES 2085614 T3 ES2085614 T3 ES 2085614T3 ES 92890136 T ES92890136 T ES 92890136T ES 92890136 T ES92890136 T ES 92890136T ES 2085614 T3 ES2085614 T3 ES 2085614T3
Authority
ES
Spain
Prior art keywords
pasta
ozone
approximately
route
duct
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
ES92890136T
Other languages
English (en)
Inventor
Kay Henricson
Joseph R Phillips
Brian F Greenwood
Erwin D Funk
Stephen J Dunn
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.)
Kamyr Inc
Original Assignee
Kamyr Inc
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 Kamyr Inc filed Critical Kamyr Inc
Application granted granted Critical
Publication of ES2085614T3 publication Critical patent/ES2085614T3/es
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
    • 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)
  • Investigating Or Analysing Biological Materials (AREA)
  • Saccharide Compounds (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)

Abstract

EN UN METODO PARA EL BLANQUEAMIENTO DE PASTA DE CONSISTENCIA MEDIA CON OZONO UTILIZANDO UN MEZCLADOR (12), UN GAS QUE CONTENGA OZONO Y PASTA CON UNA CONSISTENCIA DE UN 6 A UN 15% SE ALIMENTAN (DESDE 22) EN EL ALIMENTADOR Y DESPUES SE DESCARGAN EN UN PRIMER RECORRIDO, PREFERENTEMENTE VERTICAL (14, 16). LA MEZCLA DE LA PASTA CON EL OZONO SE MUEVE EN UNA PRIMERA PARTE DEL RECORRIDO VERTICAL DURANTE UN PERIODO DE TIEMPO DE 1 A 5 SEGUNDOS APROXIMADAMENTE A UNA VELOCIDAD DE 1 A 5 M/S APROXIMADAMENTE DE MODO QUE EL GAS Y LA PASTA NO SE SEPARAN MIENTRAS SE MUEVEN EN ESTA PRIMERA PARTE Y TIENE LUGAR LA MAYOR PARTE DE LA REACCION DE ABRILLANTAMIENTO DE LA PASTA ENTRE EL OZONO Y LA PASTA. ESTO SE CONSIGUE PREFERENTEMENTE, HACIENDO PASAR A LA MEZCLA HACIA ARRIBA EN UN CONDUCTO DE PEQUEÑO DIAMETRO (14) QUE TENGA UNA ALTURA DE 3 A 20 METROS APROXIMADAMENTE. ENTONCES LA VELOCIDAD DE LA PASTA SE REDUCE MIENTRAS QUE SE SIGUE MOVIENDO EN EL PRIMER RECORRIDO, A BASE DE ALIMENTARLA DIRECTAMENTE EN UN CONDUCTO(16) DE DIAMETRO MUCHO MAYOR (EJ. UNAS 1,5 A 10 VECES MAYOR) DE MODO QUE LA ALTURA DE LA UNIDAD SE PUEDE MANTENER POR DEBAJO DE LOS 100 PIES. LA PASTA FLUYE DENTRO DEL CONDUCTO DE DIAMETRO MENOR DURANTE 0,5 A 5 MINUTOS APROXIMADAMENTE DE MODO QUE PUEDA TENER LUGAR LA REACCION RESIDUAL. ENTONCES LA PASTA FLUYE HASTA ENTRAR EN UN SEGUNDO RECORRIDO (27) BASTANTE DIFERENTE DEL PRIMERO.
ES92890136T 1991-06-07 1992-06-05 Blanqueo por ozono con consistencia media. Expired - Lifetime ES2085614T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/710,439 US5411634A (en) 1991-04-30 1991-06-07 Medium consistency ozone bleaching

Publications (1)

Publication Number Publication Date
ES2085614T3 true ES2085614T3 (es) 1996-06-01

Family

ID=24854034

Family Applications (1)

Application Number Title Priority Date Filing Date
ES92890136T Expired - Lifetime ES2085614T3 (es) 1991-06-07 1992-06-05 Blanqueo por ozono con consistencia media.

Country Status (13)

Country Link
US (1) US5411634A (es)
EP (1) EP0517691B1 (es)
JP (1) JP3095526B2 (es)
AT (1) ATE133728T1 (es)
AU (1) AU1317292A (es)
BR (1) BR9202009A (es)
DE (1) DE69207957T2 (es)
ES (1) ES2085614T3 (es)
FI (1) FI103816B (es)
MX (1) MX9202683A (es)
NO (1) NO922239L (es)
RU (1) RU2082846C1 (es)
ZA (1) ZA922293B (es)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI925558A7 (fi) * 1992-04-22 1993-10-23 Andritz Oy Menetelmä ja laitteisto massan valkaisemiseksi
US6174409B1 (en) 1997-09-19 2001-01-16 American Air Liquide Inc. Method to improve final bleached pulp strength properties by adjusting the CI02:03 ration within a single (D/Z) stage of the bleaching process

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO144711C (no) 1978-04-04 1981-10-21 Myrens Verksted As Fremgangsmaate til bleking av oksygendelignifiserte celluloseholdige masser med ozon
US4372812A (en) * 1978-04-07 1983-02-08 International Paper Company Chlorine free process for bleaching lignocellulosic pulp
US4902381A (en) * 1988-12-09 1990-02-20 Kamyr, Inc. Method of bleaching pulp with ozone-chlorine mixtures
FI89516B (fi) * 1989-05-10 1993-06-30 Ahlstroem Oy Foerfarande foer blekning av cellulosamassa med otson
US5034095A (en) * 1989-06-01 1991-07-23 Oji Paper Co., Ltd. Apparatus and process for the delignification of cellulose pulp
AU636173B2 (en) * 1989-10-30 1993-04-22 Lenzing Aktiengesellschaft Method for the chlorine-free bleaching of pulps

Also Published As

Publication number Publication date
DE69207957T2 (de) 1996-09-19
EP0517691B1 (en) 1996-01-31
US5411634A (en) 1995-05-02
JPH05163691A (ja) 1993-06-29
BR9202009A (pt) 1993-01-19
AU1317292A (en) 1992-12-10
RU2082846C1 (ru) 1997-06-27
JP3095526B2 (ja) 2000-10-03
EP0517691A1 (en) 1992-12-09
DE69207957D1 (de) 1996-03-14
ZA922293B (en) 1992-11-25
ATE133728T1 (de) 1996-02-15
NO922239L (no) 1992-12-08
FI921776A7 (fi) 1992-12-08
FI921776A0 (fi) 1992-04-22
MX9202683A (es) 1993-08-01
FI103816B1 (fi) 1999-09-30
NO922239D0 (no) 1992-06-05
FI103816B (fi) 1999-09-30

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