EP 1019565 A1 20000719 - METHOD FOR PREPARING ALKALINE METAL-CONTAINING ETCHING SOLUTIONS
Title (en)
METHOD FOR PREPARING ALKALINE METAL-CONTAINING ETCHING SOLUTIONS
Title (de)
VERFAHREN ZUR AUFBEREITUNG ALKALISCHER METALLHALTIGER ÄTZLÖSUNGEN
Title (fr)
PROCEDE POUR LA PREPARATION DE SOLUTIONS D'ATTAQUE METALLIFERES ALCALINES
Publication
Application
Priority
- DE 9802669 W 19980905
- DE 19739568 A 19970910
Abstract (en)
[origin: WO9913130A1] The present invention relates to a method for preparing alkaline metal-containing etching solutions. This method comprises carrying out a liquid-liquid extraction in which the etching solution represents the heavy phase while an organic solution represents the light phase, and removing the metallic ions from said etching solution. A coalescence separation is carried out during each extraction step. The extraction phase is scrubbed and the alkaline constituent as well as the metallic constituent are recovered from said extraction phase. The alkaline constituent is then removed by a stripping process from the scrubbing liquid containing the same.
IPC 1-7
IPC 8 full level
B01D 11/04 (2006.01); C23F 1/46 (2006.01); B01D 11/00 (2006.01)
CPC (source: EP)
B01D 11/0457 (2013.01); C23F 1/46 (2013.01); B01D 2011/002 (2013.01)
Citation (search report)
See references of WO 9913130A1
Designated contracting state (EPC)
AT CH DE FR GB IT LI NL
DOCDB simple family (publication)
WO 9913130 A1 19990318; AU 1141399 A 19990329; EP 1019565 A1 20000719
DOCDB simple family (application)
DE 9802669 W 19980905; AU 1141399 A 19980905; EP 98954152 A 19980905