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Methods for the decomposition of copper ferriteButler, Gurdon Montague, 1913- January 1934 (has links)
No description available.
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A study of the preparation and properties of the ferrites of copperThompson, Alvin Jerome, 1903- January 1933 (has links)
No description available.
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The flash oxidation of copper concentrateMeaders, Robert Claiborne, 1909- January 1934 (has links)
No description available.
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Experimental work on the soap flotation of chrysocolla; part IILeininger, Charles William, 1913- January 1937 (has links)
No description available.
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Flotation of Puerto Rico chalcopyritePerez Gonzalez, Juan Antonio, 1945- January 1972 (has links)
No description available.
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Vacuum refining copper meltsDanovitch, David. January 1982 (has links)
No description available.
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Pentlandite phase relations in the Cu-Fe-Ni-S systemGill, James Wendell January 1975 (has links)
No description available.
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Matteslag behaviour under high pSO2 conditionsTavera-Miranda, Francisco Javier January 1977 (has links)
No description available.
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Direct copper production from a loaded chelating extractant (an alkylated 8-hydroxyquinoline) by pressure hydrogen strippingDemopoulos, G. p. (George Pan). January 1981 (has links)
A novel technique of direct copper precipitation from a loaded chelating extractant using hydrogen in an autoclave (pressure hydrogen stripping) was studied. In its simplest form, the reaction is given by / {CuL(,2)}(,org) + H(,2)(g) (--->) 2{HL}(,org) + Cu(s). / Kelex 100 (Sherex Chemical Co. - commercial solvent extraction reagent), an alkylated derivative of 8-hydroxyquinoline was used as the basis of the present investigation and represents HL in the above equation. / Two types of experiments were carried out: (a) those designed to study the chemical and thermal response of the extractant at high temperature and hydrogen pressures and (b) those which describe the chemistry and kinetics of hydrogen stripping. / The extractant was found to exhibit excellent chemical stability up to 573 K (300(DEGREES)C) and 2.76 MPa (400 psi) hydrogen in the absence of copper. Its chemical stability was somewhat reduced when loaded with copper. In the latter case, some limited hydrogenation of the quinoline nucleus of the extractant and some of the impurities present (furoquinolines) was observed. The chemical stability of the extractant was found to be enhanced when at least 0.52 M of a long-chain alcohol (decanol) was added to the organic solvent (0.4 M Kelex/kerosene). A slow thermal dissociation of the copper chelate was found to take place within the experimental temperature range studied (443 to 488 K). This resulted in copper precipitation and organic regeneration. / Copper in a powder form was found to precipitate rapidly from loaded Kelex 100/decanol/kerosene solvents by reaction with hydrogen at pressures between 0.52 and 4.00 MPa (75 and 580 psi) and temperatures from 443 to 488 K (170 to 215(DEGREES)C). The overall process has heterogeneous characteristics. Nuclei are provided through slow thermal dissociation of the copper chelate. The freshly produced metallic copper, acting autocatalytically accelerates the precipitation kinetics. Reduction of the Cu(II) chelate to Cu(I) complex appears to be the rate controlling step. / In addition to temperature and pressure, the effects of seeding, agitation, copper concentration, ligand concentration and copper chelate age were investigated. Some physical and chemical properties of the copper powder product were also determined.
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Metal losses in slag.Poggi, Daniel. January 1968 (has links)
No description available.
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