Abstract: The present invention provides a method of purifying aluminum, and/or use of the purified aluminum as a solvent metal to purify silicon.

Abstract: Process for removing the noble metal from noble metal-containing moulded catalyst bodies, comprising these steps of A leaching the noble metal from loosely heaped moulded catalyst bodies, B removing the mother liquor, C automated conveying of the moulded bodies into a centrifuge, D renewed leaching, E separating off of the residual mother liquor by centrifuging.

Abstract: Process for removing the noble metal from noble metal-containing moulded catalyst bodies, comprising these steps of A leaching the noble metal from loosely heaped moulded catalyst bodies, B removing the mother liquor, C automated conveying of the moulded bodies into a centrifuge, D renewed leaching, E separating off of the residual mother liquor by centrifuging.

Abstract: The present invention is directed to a method for separating the group III element component of a group III-V material from an aqueous waste containing a group III-V material to allow for their recovery and beneficial use. The method includes adjusting the pH of an aqueous waste containing a group III-V material to a pH from about 9.5 to about 12.5 by adding an alkali metal hydroxide base to the aqueous waste; precipitating a group V element oxyanion by adding a soluble alkaline metal salt to the aqueous waste; separating the group V element oxyanion from the aqueous waste; adjusting the pH of the aqueous waste to form a group III element hydroxide precipitate by adding a mineral acid to the aqueous waste; separating the group III element hydroxide precipitate from the aqueous waste; and recovering the group III element from the group III element hydroxide precipitate.

Abstract: Process for obtaining a metallic phase from a dispersed mixture composed of one of (a) at least one metal selected from the group consisting of a light metal or an alloy of the at least one metal, and mixtures thereof, and (b) at least one non-metallic phase composed of at least one member selected from the group consisting of at least one oxide, an oxide compound, and other compounds of the at least one metal at higher temperatures. The process includes introducing the dispersed mixture into a metallurgical vessel; at least one of heating and adjusting a temperature of the dispersed mixture to between 20 and 250.degree. C. above the liquidus temperature of the metallic phase; rotating the metallurgical vessel to homogenize the dispersed mixture and to produce a pourable dispersed mixture; uniformly distributing the pourable dispersed mixture around a rotational axis of the metallurgical vessel; and increasing a radial acceleration of the pourable dispersed mixture of at least 1 g.

Abstract: Process and apparatus for the treatment of light metals. The present invention pertains to a process for the treatment of mixtures of at least one light metal and at least one nonmetallic phase, formed of at least one oxide of a light metal, particularly of slag and waste metals for a subsequent process for the separation of the metallic phase as well as an apparatus for carrying out the process or the preparation of the mixture for disintegration, wherein the mixture, slag or waste metals and, if necessary, additions for the formation of a charge, are loaded into a treatment container or receptacle, overheated a maximum of 380.degree. C. and the phases, via motion, are dispersed and/or held in dispersement, whereafter the homogenized charge, set up with the parameters for the subsequent process, is removed and subjected to separation.

Abstract: Method for the extraction of the metallic phase from dispersed mixtures of light metals and nonmetallic components. The invention pertains to an advantageous method for the extraction of the metallic phase from a dispersed mixture comprised of at least one light metal and at least one nonmetallic phase and, if applicable, at least the partial separation of the nonmetallic phase. The temperature of the dispersed mixture is raised to a temperature in the region above the melting temperature of the metal or alloy; the heated mixture is then inserted into an apparatus, subjected to an acceleration, and disintegrated, with the metallic phase thereafter being coalesced, collected and allowed to proceed to solidification.

Abstract: The invention concerns a process for de-metallization of metal-containing residues, dross, slags and the like that accumulate during thermal processes in metallurgical and scrap metal reclamation processes which consists of that the metal/non-metal phase mixture is fed into a centrifuge mold at a temperature within the mentioned temperature range or after having been fed into it is brought to the temperature mentioned, there in a first process phase, while maintaining the temperature within the mentioned range, it is subjected to radial acceleration for a specified time until a required degree of de-metallization is achieved and that in a second phase of the process by maintaining the radial acceleration by means of rotation at least the metallic phase, separated and removed from the phase mixture and arranged on the outside periphery is brought to solidification or setting by lowering its temperature, after which the metal phase when reaching the handling temperature is removed as at least one body whose out