Premium
The mechanism of the adsorption of ethyl xanthate ion on galena (II)
Author(s) -
Wells P. F.,
Van Cleave A. B.
Publication year - 1975
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450530609
Subject(s) - xanthate , chemistry , adsorption , galena , inorganic chemistry , chemisorption , ion , organic chemistry , sphalerite , pyrite , mineralogy
Studies of the adsorption of 35 S labelled ethyl xanthate ion and of 35 S labelled diethyl dixanthogen show that both species are competitively chemisorbed to an approximately equal extent on a galena surface, but that ethyl xanthate ion is oxidised to a species which is physically adsorbed, while diethyl dixanthogen is reduced to ethyl xanthate ion which is partially desorbed. It is suggested that galena surfaces are sufficiently heterogenous that oxidative chemisorption and oxidation of ethyl xanthate ion can take place on the anodic parts of the surface while diethyl dixanthogen can be reductively chemisorbed or completely reduced on the cathodic areas. The relationship of these processes to the normal flotation of galena is discussed.