摘要:
The present invention relates to a method for producing a metal by a direct oxide reduction process with Ca. A CaCl 2 -based molten salt containing Ca is held in a reduction chamber 1, a metal oxide is introduced into the molten salt in the reduction chamber 1, and the metal oxide is reduced with the Ca in the molten salt to form said metal. The metal formed in the molten salt is separated from the molten salt in a separation means 2, and the molten salt deprived of the metal is introduced into a chlorination chamber 7 and subjected to chlorination treatment with chlorine gas to eliminate the byproduct CaO in the molten salt. The molten salt after chlorination treatment is introduced into an electrolysis chamber 8 and electrolyzed for the formation of Ca and chlorine from CaCl 2 , and the thus-formed Ca or Ca-containing molten salt is transferred from the electrolysis chamber 8 to the reduction chamber 1. The chlorine obtained in the electrolysis chamber 8 is used in the chlorination chamber 7. Thus, the present invention provides a metal production method and an apparatus wherein high levels of productivity are obtained and the product metal can be inhibited from carbon contamination due to CaO, without any generation of CO 2 from the production process, while their being based on the direct oxide reduction process comprising the step of reducing a metal oxide with Ca.
摘要:
A fast quench reaction includes a reactor chamber having a high temperature heating means such as a plasma torch at its inlet and a means of rapidly expanding a reactant stream, such as a restrictive convergent-divergent nozzle at its outlet end. Metal halide reactants are injected into the reactor chamber. Reducing gas is added at different stages in the process to form a desired end product and prevent back reactions. The resulting heated gaseous stream is then rapidly cooled by expansion of the gaseous stream.
摘要:
High yields of vanadium containing virtually no nickel or magnesium are obtained from natural bitumen ash consisting of up to 5% carbon, more than 95% of water-soluble compounds of vanadium, nickel and magnesium by mixing the ash with water to produce a 20% solids slurry of pH below 6.5 and temperature of 80-85° C oxidizing any reduced vanadium in the slurry and then separating and removing the resulting polyvanadate precipitate from the liquid phase containing substantially all the nickel and magnesium values of the ash.
摘要:
Process for converting soot containing partially oxidized vanadium, obtainable by a gasification process, comprising subjecting such soot to an oxidizing treatment which is carried out under such conditions that the amount of vanadium pentoxide in the final product is at most 30% by weight, calculated on partially oxidized vanadium present in the soot.
摘要:
On a décrit un procédé de traitement antipollution et de la récupération des métaux d'un catalyseur de raffinage d'une charge de pétrole à l'état usé renfermant au moins un métal contaminant choisi dans le groupe constitué par le vanadium, le nickel, et le fer. Le procédé est caractérisé notamment en ce que a/ le catalyseur déchargé de l'unité industrielle est soumis à un strippage b/ le catalyseur est calciné dans les conditions critiques et c/ les métaux du catalyseur subissent une lixiviation en présence d'une solution aqueuse de soude caustique ou de carbonate de sodium. Le procédé s'applique à un traitement antipollution et de la récupération des métaux des catalyseurs usés notamment des catalyseurs d'hydrotraitement ou d'hydroconversion d'une charge pétrolière.
摘要:
The selective precipitation of molybdenum in a form that is substantially free from vanadium impurities is effected by precipitating the molybdenum in the form of ammonium octamolybdates.
摘要:
The invention is directed to a process of treating waste materials, particularly petroleum cracking catalyst waste containing contaminating and/or valuable metals to decontaminate the waste and/or recover the metals therefrom which process comprises the reduction of the metals contained in the waste in the presence of a slag former such as a silica-alumina composite, a flux such as a Group IA or IIA oxide and a phosphate containing compound. The metals are recovered as metals or metal phosphides in a distinct ferrophos layer. The accumulated metals can be further processed to recover the metal content thereof. The process parallels the electrothermal process for producing phosphorus which is desirably utilized as disclosed herein to recover valuable Group VB to Group VIII metals.