EP 0876196 A1 19981111 - PROCESS FOR PURIFYING A LIQUID CONTAMINATED BY FILAMENTARY MOLECULES
Title (en)
PROCESS FOR PURIFYING A LIQUID CONTAMINATED BY FILAMENTARY MOLECULES
Title (de)
VERFAHREN ZUR REINIGUNG EINER MIT FADENMOLEKÜLEN VERSCHMUTZTEN FLÜSSIGKEIT
Title (fr)
PROCEDE D'EPURATION D'UN LIQUIDE POLLUE PAR DES MOLECULES FILIFORMES
Publication
Application
Priority
- CH 9600454 W 19961220
- CH 365595 A 19951223
Abstract (en)
[origin: WO9723279A1] Liquids which are contaminated in a production plant by filamentary molecules with molar masses of at least 10,000 daltons are purified by means of a selective diaphragm separation process before being fed back into the production plant. This concerns, for example, hemicellulose-contaminated caustic soda occurring in the production of cellulose and viscose. In the diaphragm separation process, nanofiltration is performed with a separation limit of under 1,000 daltons.
IPC 1-7
IPC 8 full level
B01D 61/02 (2006.01); C01D 1/28 (2006.01); C02F 1/44 (2006.01)
CPC (source: EP)
B01D 61/027 (2013.01); C01D 1/28 (2013.01); C02F 1/442 (2013.01)
Citation (search report)
See references of WO 9723279A1
Designated contracting state (EPC)
AT CH DE FI GB IT LI NL SE
DOCDB simple family (publication)
WO 9723279 A1 19970703; AU 1136697 A 19970717; CA 2241193 A1 19970703; DE 19681150 D2 19990812; EP 0876196 A1 19981111
DOCDB simple family (application)
CH 9600454 W 19961220; AU 1136697 A 19961220; CA 2241193 A 19961220; DE 19681150 T 19961220; EP 96942225 A 19961220