DE109152C
(forum.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.
ES401050A1
(es )
1975-07-01
Procedimiento de lixiviacion selectiva en etapas multiples para extraer hierro reactivo con un acido, a partir de ali- mentacion de mineral de sulfuro de hierro.
US653414A
(en )
1900-07-10
Process of extracting copper or other metals from tailings or ores of such metals.
US1992060A
(en )
1935-02-19
Process for treating cyanide solutions
US360904A
(en )
1887-04-12
Elizabeth babnston pabnell
DE273046C
(forum.php )
1900-01-01
US411047A
(en )
1889-09-17
John s
DE251330C
(forum.php )
US2187468A
(en )
1940-01-16
Process of treating molybdenum ores and products resulting therefrom
US1305969A
(en )
1919-06-03
jackson
US900452A
(en )
1908-10-06
Art of separating metals from matte.
US1864777A
(en )
1932-06-28
Recovery of metals from zinc plant residue
US2186779A
(en )
1940-01-09
Method of recovering gold from saprolite gold ores and other refractory slow settling gold ores
DE930870C
(de )
1955-07-25
Verfahren zur Gewinnung von Tonerde und Eisenoxyd aus Bauxit usw.
DE381423C
(de )
1923-09-20
Verfahren zur Gewinnung von reinem Zinksulfid
US1556822A
(en )
1925-10-13
Multiple-roast chloridizing process
US723949A
(en )
1903-03-31
Process of separating copper from ores.
US1573169A
(en )
1926-02-16
Process of purifying gas-house liquor
AT30495B
(de )
1907-11-11
Amalgamierungsverfahren für Gold- und Silbererze.
DE224817C
(forum.php )
del Rio
1834
Silver Ores Reduced by the Method of Becquerel
SU498960A1
(ru )
1976-01-15
Способ переработки продуктов, содержащих сульфиды