Abstract: A process for producing phosphorus pentoxide from phosphate ore includes the mixing and formulation of a feed mixture of phosphate ore with lime and solid carbonaceous material in amounts to produce a feed mixture having a CaO/SiO.sub.2 mole ratio greater than about 8.0. This mixture is formed into pellets which are then exposed to radiation eminating from an oxidation zone, preferably within a rotary type kiln, in order to heat the pellets to a temperature sufficient to reduce the phosphate by reaction with the solid carbonaceous material to form elemental phosphorus vapor without substantial melting of the pellets. Sufficient oxygen-containing gas is provided to cause oxidation of the elemental phosphorus vapor within the oxidation zone to produce phosphorus pentoxide.

Abstract: The instant disclosure relates to a method of tracing the flow of a solution for extracting values from an ore, wherein such extraction leaves behind an extracted ore, which method comprises(a) providing a material in said solution which will interact with said extracted ore to form a product, and(b) detecting said product.The instant invention is especially useful for the extraction of copper values from copper oxide ores such as chrysocolla, neotocite, malacite and cuprite. Preferably, the extraction solution is an acidic solution comprising sulfuric acid and said material is a fluorescent surface-active dye which forms an adsorption product with the porous gel-like aluminosilicate network which remains after extracting the copper values from the above ores. A sample of said extracted ore is obtained by drilling and such sample is irradiated with ultra-violet light, e.g. at a wavelength of from about 220 to about 400 nm, depending on the particular dye to detect such adsorption product.

Abstract: Disclosed is a method of economically exploiting deep set porphyry ore bodies of the type containing metal values such as sulfidic copper nickel or uranium minerals and minerals capable of absorbing copper, uranium and nickel ions. The method involves establishing communication with the ore body through access and recovery wells and passing fluids sequentially therethrough. If necessary, thief zones of as low as 25 to 50 md in igneous rock of 1 to 5 md are prevented from distorting flow, by the injection of a polymeric solution of macromolecules with molecular weights of the order of 5 million along the entire wellbore, the higher permeability zones initially accepting the majority of the flow and being impaired at a much faster rate than the less permeable zones.