|6146601||Enrichment of silicon or germanium isotopes|
Isotopes of either germanium or silicon are separated by a chemical exchange reaction. Preferably the compound is a hydro halide or halide composition and the donor can be a wide variety of compounds such as a lower molecular weight alcohol....
|6030433||Method for extracting metals from metal-containing materials by pyrohydrolysis|
A method for extracting metals from metal-containing materials, especially waste, by pyrohydrolysis. The metal-containing materials which contain at least one or more of the metals from the group consisting of Zn, Cd, Pb, Hg, Cu, Sn (as Sn(0) and Sn(II)),...
|4937148||Process for preparing conductive fine particles|
Transparent conductive coatings excellent in transparency are provided on substrates such as glass, plastics, etc. by the use of conductive coating materials obtained by maintaining aqueous solutions of hydrolyzable tin containing or indium containing com...
|4610722||Process for metal recovery from steel plant dust|
A process is provided for hydrometallurgical processing of steel plant dusts containing cadmium, lead, zinc, and iron values, along with impurities such as chloride and fluoride salts of sodium, potassium, magnesium, etc. The first step in the process inv...
|4396593||Process for the production of tin(IV) chloride|
Chlorine is reacted with excess tin in liquid tin(IV) chloride at 20° to 90° C., 30 to 300 dm3 (S.T.P.)h-1 of chlorine being passed in per dm3 of tin(IV) chloride present in the reaction chamber and 0.08 to 0.3 dm3
|4225342||Treatment of zinc plant leach residues for recovery of the contained metal values|
A process for treating zinc plant leach residues for the recovery of the lead, silver, and tin values contained therein is disclosed. The process includes the treatment of the zinc plant residue with concentrated sulphuric acid followed by water leaching ...