Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Renato G. Bautista"'
Autor:
Renato G. Bautista
The mineral resources of the industrialized countries, especially the member nations of the North Atlantic Treaty Organiza tion, are being depleted at such a rate that more and more of these count ries are beginning to depend on ore imported from o
Autor:
Renato G. Bautista
Publikováno v:
JOM. 55:23-26
Gallium has become increasingly popular as a substrate material for electronic devices. Aside from ore, gallium can be obtained from such industrial sources as the Bayer process caustic liquor that is a byproduct of bauxite processing, flue dust remo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::54709b5cd61a8ed6e12f1ab767aeb5e0
https://doi.org/10.1007/s11837-003-0155-2
https://doi.org/10.1007/s11837-003-0155-2
Autor:
Victor Vasquez, Renato G. Bautista
Publikováno v:
Mineral Processing and Extractive Metallurgy Review. 17:239-255
A general review of the mass transfer correlation coefficients available in the literature was done. The emphasis was for liquid-liquid phases and the main mathematical forms of the correlations accessible are reported. In general, there is a necessi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d05f22670adfcfacf4249600539994f
https://doi.org/10.1080/08827509708914150
https://doi.org/10.1080/08827509708914150
Autor:
Renato G. Bautista
Publikováno v:
Mineral Processing and Extractive Metallurgy Review. 15:13-22
The development of the kinetic expression for the dissolution of a nickeliferous sulfide by ferric sulfate and of pyrite by oxygen and ferric sulfate on the basis of its oxidation mechanism is discussed. The rate of dissolution of complex ores is det
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0b1b805a1c4857b54f1d27b2743c1986
https://doi.org/10.1080/08827509508914179
https://doi.org/10.1080/08827509508914179
Autor:
Renato G. Bautista, Knona C. Liddell
Publikováno v:
Metallurgical and Materials Transactions B. 26:687-694
A combined partial equilibrium-mixing cell model has been used to investigate the effects of fluid flow, mineral content, porosity, and lixiviant concentrations onin situ leaching of uraninite. The model couples the rate processes of reactive transpo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::be672d2005753e9cc1b7d330d5c89df9
https://doi.org/10.1007/bf02651714
https://doi.org/10.1007/bf02651714
Autor:
Knona C. Liddell, Renato G. Bautista
Publikováno v:
Metallurgical and Materials Transactions B. 26:695-701
The effects of variations in the concentrations of leaching reagents have been stimulated for in situ leaching of UO{sub 2} by H{sub 2}O{sub 2}-(NH{sub 4}){sub 2}CO{sub 3}-NH{sub 4}HCO{sub 3}. The model used in the simulations incorporates rate laws
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2452844591b473915071453fac57c307
https://doi.org/10.1007/bf02651715
https://doi.org/10.1007/bf02651715
Autor:
Knona C. Liddell, Renato G. Bautista
Publikováno v:
Metallurgical and Materials Transactions B. 25:171-183
In situ leaching of uraninite and calcite by H2O2-NH4HCO2-(NH4)2CO3 solutions has been simulated using a partial equilibrium model which incorporates a one-parameter mixing cell model of solution flow. Rate laws for UO2 dissolution and for CaCO2 diss
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3047fb6cfb153af588851e10e0471ea0
https://doi.org/10.1007/bf02665200
https://doi.org/10.1007/bf02665200
Autor:
Renato G. Bautista
Publikováno v:
Mineral Processing and Extractive Metallurgy Review. 8:175-182
The conventional method of separation of rare earths by multistage liquid-liquid extraction is still the best processing technology for their separation and purification. One of the most promising developments in the last decade that could have an im
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::efcfbac4d7f21bb61a232327f257188c
https://doi.org/10.1080/08827509208952685
https://doi.org/10.1080/08827509208952685
Autor:
Renato G. Bautista, Jack S. McPartland
Publikováno v:
Separation Science and Technology. 25:2045-2055
Experiments were conducted to determine the feasibility of leaching cobalt from a hydrotreating catalyst material using supercritical aqueous ammonia solvents. The effects on cobalt extraction caused by variations in solvent composition, pressure and
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::36eac29bd6f29987b7708cb1c61c57a6
https://doi.org/10.1080/01496399008050443
https://doi.org/10.1080/01496399008050443
Autor:
Renato G. Bautista, David L. Felker
Publikováno v:
JOM. 42:60-63
Chalcopyrite (CuFeS{sub 2}) is one of the most abundant copper-bearing minerals in the U.S. Oxidative leaching and smelting and refining are the most common methods used for recovering copper from chalcopyrite. One of the problems associated with oxi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3ab9db3f47158a24b74a58b12bdbf3b9
https://doi.org/10.1007/bf03220927
https://doi.org/10.1007/bf03220927