DE109152C
(member.php )
US1891532A
(en )
1932-12-20
Process for extracting metals from ores, minerals, and other materials
US1570777A
(en )
1926-01-26
Process for treating sulphide ores
AT92287B
(de )
1923-04-25
Verfahren zur Gewinnung und Reinigung von Zellstoff aus Holz und ähnlichen zellstoffhaltigen Stoffen.
ES428807A1
(es )
1976-08-16
Procedimiento combinado de lixiviacion selectiva para ex- traer hierro de una alimentacion de mineral de hierro.
GB1368535A
(en )
1974-09-25
Method for selectively abstracting nickel from an aqueous ammoniacal solution
US653414A
(en )
1900-07-10
Process of extracting copper or other metals from tailings or ores of such metals.
US360904A
(en )
1887-04-12
Elizabeth babnston pabnell
DE273046C
(member.php )
1900-01-01
US411047A
(en )
1889-09-17
John s
DE251330C
(member.php )
US2187468A
(en )
1940-01-16
Process of treating molybdenum ores and products resulting therefrom
GB447626A
(en )
1936-05-22
Improvements in recovering precious metals
US651506A
(en )
1900-06-12
Barrell amalgamation of precious metals.
US900452A
(en )
1908-10-06
Art of separating metals from matte.
AT314473B
(de )
1974-04-10
Verfahren zur Aufarbeitung von Rotschlamm
US723158A
(en )
1903-03-17
Process of treating nickel ores, &c.
US1737140A
(en )
1929-11-26
Process for the recovery of tin and its associated metals from alloys, mechanical mixtures, and ores
US704640A
(en )
1902-07-15
Process of extracting copper and nickel from sulfid compounds.
US1864777A
(en )
1932-06-28
Recovery of metals from zinc plant residue
US702153A
(en )
1902-06-10
Treatment of ores and materials containing antimony.
DE930870C
(de )
1955-07-25
Verfahren zur Gewinnung von Tonerde und Eisenoxyd aus Bauxit usw.
US1556822A
(en )
1925-10-13
Multiple-roast chloridizing process
US659340A
(en )
1900-10-09
Process of extracting zinc and copper from their ores.
AT30495B
(de )
1907-11-11
Amalgamierungsverfahren für Gold- und Silbererze.