WIPO logo
Mobile | Deutsch | Español | Français | 日本語 | 한국어 | Português | Русский | 中文 | العربية |
PATENTSCOPE

Search International and National Patent Collections
World Intellectual Property Organization
Search
 
Browse
 
Translate
 
Options
 
News
 
Login
 
Help
 
Machine translation
1. (WO1979000931) PREPARATION OF WHITE LIQUOR
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000931    International Application No.:    PCT/SE1979/000085
Publication Date: 15.11.1979 International Filing Date: 09.04.1979
IPC:
C01D 1/22 (2006.01), C01F 11/18 (2006.01), D21C 11/00 (2006.01)
Applicants:
Inventors:
Priority Data:
7804239 14.04.1978 SE
Title (EN) PREPARATION OF WHITE LIQUOR
(FR) PREPARATION DE LIQUEUR BLANCHE
Abstract: front page image
(EN)A process for the preparation of white liquor for the sulphate pulping process, wherein quicklime is slaked with green liquor (4) and the slaked lime formed is reacted with the sodium carbonate in the green liquor (4) to sodium hydroxide in a causticizing process, the lime sludge formed being separated. According to the invention, the process from the slaking of the lime up to the separation of the white liquor (7) and lime sludge is carried out at a pressure above the atmospheric pressure. In a preferred embodiment, the process is also carried out at a temperature above the normal boiling temperature of the system.
(FR)Procede de preparation de liqueur blanche pour le procede de traitement de la pulpe au sulfate, ou la chaux vive est eteinte avec de la liqueur verte (4) et l"on fait reagir la chaux eteinte formee avec du carbonate de sodium dans la liqueur verte (4) pour former de la soude, la boue de chaux formee etant separee. Le procede, d"extinction de la chaux jusqu"a la separation de la liqueur blanche (7) et de la boue a base de chaux, a lieu a une pression superieure a la pression atmospherique. Dans un mode preferentiel de realisation, le procede se deroule a une temperature superieure a la temperature normale d"ebullition du systeme.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)