초록 ▼

The invention relates to a process for recovering Group VIB metals from a catalyst, in particular a spent bulk catalyst, comprising one or more Group VIB metals and one or more Group VIII metals. Further, the invention relates to a solid Group VIB metal compound obtainable by the process according t

The invention relates to a process for recovering Group VIB metals from a catalyst, in particular a spent bulk catalyst, comprising one or more Group VIB metals and one or more Group VIII metals. Further, the invention relates to a solid Group VIB metal compound obtainable by the process according to the invention having the general formula H2XO4, wherein X=W1-yMoy, wherein y is between 0 and 1 and to its use in a process for the manufacture of a fresh catalyst. The process comprises the steps of:a) oxidizing the one or more Group VIB metals to one or more Group VIB metal oxides;b) separating the one or more Group VIB metal oxides from the one or more Group VIII metals;c) dissolving the one or more Group VIB metal oxides in water to produce an aqueous solution of one or more Group VIB metal oxides;d) precipitating the one or more Group VIB metal oxides from the aqueous solution by adding alkaline earth metal (Group IIa) ions to the aqueous solution;e) optionally filtering and washing the precipitate; andf) transforming the precipitate by adding an acid to form a solid metal compound comprising one or more Group VIB metals.

대표청구항 ▼

The invention claimed is: 1. A process for recovering one or more Group VIB metals from a catalyst having one or more Group VIB metals and one or more Group VIII metals, the process comprising the steps of:a) oxidizing the one or more Group VIB metals to one or more Group VIB metal oxides,b) separat

The invention claimed is: 1. A process for recovering one or more Group VIB metals from a catalyst having one or more Group VIB metals and one or more Group VIII metals, the process comprising the steps of:a) oxidizing the one or more Group VIB metals to one or more Group VIB metal oxides,b) separating the one or more Group VIB metal oxides from the one or more Group VIII metals,c) dissolving the one or more Group VIB metal oxides in water to produce an aqueous solution of one or more Group VIB metal oxides,d) precipitating the one or more Group VIB metal oxides from the aqueous solution by adding alkaline earth metal ions to the aqueous solution,e) optionally filtering and washing the precipitate, andf) transforming the precipitate by adding an acid to form a solid metal compound comprising one or more Group VIB metals.