DE109152C
(enExample )
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
DE2514398C2
(de )
1984-04-05
Salzbad zur Abschreckung badnitrierter Bauteile
AT92287B
(de )
1923-04-25
Verfahren zur Gewinnung und Reinigung von Zellstoff aus Holz und ähnlichen zellstoffhaltigen Stoffen.
ES428803A1
(es )
1976-08-16
Procedimiento para producir soluciones de sulfato de hierrode gran pureza.
GB1368535A
(en )
1974-09-25
Method for selectively abstracting nickel from an aqueous ammoniacal solution
DE273046C
(enExample )
1900-01-01
US411047A
(en )
1889-09-17
John s
DE251330C
(enExample )
US900454A
(en )
1908-10-06
Art of separating metals from speiss.
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.
AT314473B
(de )
1974-04-10
Verfahren zur Aufarbeitung von Rotschlamm
US2778727A
(en )
1957-01-22
Method of concentrating metal values from sulfur solutions
DE265280C
(enExample )
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
DE930870C
(de )
1955-07-25
Verfahren zur Gewinnung von Tonerde und Eisenoxyd aus Bauxit usw.
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