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1. WO1985000046 - LOW CONSISTENCY OZONE BLEACHING REACTOR

Publication Number WO/1985/000046
Publication Date 03.01.1985
International Application No. PCT/US1984/000905
International Filing Date 14.06.1984
IPC
B01F 7/00 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
7Mixers with rotary stirring devices in fixed receptacles; Kneaders
D21C 9/153 2006.01
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE- CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters
10Bleaching
147with oxygen or its allotropic modifications
153with ozone
CPC
B01F 7/00908
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
FMIXING, e.g. DISSOLVING, EMULSIFYING, DISPERSING
7Mixers with rotary stirring devices in fixed receptacles ; , i.e. movement of the receptacle not being meant to effect the mixing
00908Pipe mixers, i.e. mixing material flowing continuously through pipes, e.g. column mixers
D21C 9/153
DTEXTILES; PAPER
21PAPER-MAKING; PRODUCTION OF CELLULOSE
CPRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
9After-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
10Bleaching ; ; Apparatus therefor
147with oxygen or its allotropic modifications
153with ozone
Applicants
  • WEYERHAEUSER COMPANY [US]/[US]
Inventors
  • MEREDITH, Michael, Dean
  • FLECK, John, Acroyd
  • MOORE, Steven, James
Agents
  • CRAWFORD, John, M. @
Priority Data
504,19514.06.1983US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) LOW CONSISTENCY OZONE BLEACHING REACTOR
(FR) REACTEUR DE BLANCHISSAGE A L'OZONE DE FAIBLE CONSISTANCE
Abstract
(EN)
A reaction vessel (10) which mixes ozone (23a-f) with a low consistency pulp and a dewatering vessel (14g) which removes the liquid (27) from the pulp before it leaves the reactor, regulating this same liquid to the pulp entering the reactor. The inner diameter of the recycle pipe (36) is 7.7 to 45% of the inner diameter of the reaction chamber.
(FR)
Récipient de réaction (10) qui mélange l'ozone (23a-f) avec une pulpe de faible consistance et récipient de déshydratation (14g) qui élimine le liquide (27) de la pulpe avant que celle-ci ne quitte le réacteur, régulant ce même liquide en fonction de la pulpe pénétrant dans le réacteur. Le diamètre interne de la conduite de recyclage (36) est compris entre 7,7 et 45% du diamètre interne de la chambre de réaction.
Also published as
FI850580
NO19850509
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