EP 0880468 A4 19990512 - BAUXITE TREATMENT
Title (en)
BAUXITE TREATMENT
Title (de)
BEHANDLUNG VON BAUXIT
Title (fr)
TRAITEMENT DE LA BAUXITE
Publication
Application
Priority
- AU 9700074 W 19970211
- AU PN808296 A 19960215
Abstract (en)
[origin: WO9729993A1] Prior to the digestion of bauxite (which contains silica) in a digestion solution such as caustic soda for the production of aluminium oxide, the bauxite is mechanically activated to induce a mechanochemical reaction in the presence of a reagent such as lime. At least a portion of the silica is rendered insoluble and unreactive to the formation of sodium-aluminium-silicate desilication product (DSP) during subsequent digestion of the bauxite in the digestion solution.
IPC 1-7
IPC 8 full level
C01F 7/0613 (2022.01)
CPC (source: EP)
C01F 7/0613 (2013.01)
Citation (search report)
- [XY] US 3357792 A 19671212 - ISTVAN GEBEFUGI
- [Y] DE 4036448 A1 19910523 - PAWLEK FRANZ PROF DR ING [DE]
- [A] DD 50059 A
- See references of WO 9729993A1
Designated contracting state (EPC)
DE ES FR GB GR IE IT
DOCDB simple family (publication)
WO 9729993 A1 19970821; AU PN808296 A0 19960307; BR 9707543 A 20000104; EP 0880468 A1 19981202; EP 0880468 A4 19990512
DOCDB simple family (application)
AU 9700074 W 19970211; AU PN808296 A 19960215; BR 9707543 A 19970211; EP 97902108 A 19970211