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a process for recovering one or more vib group metals from a catalyst having one or more vib group metals and one or more group viii metals; solid metal compound; process for manufacturing a fresh catalyst
a process for recovering one or more vib group metals from a catalyst having one or more vib group metals and one or more group viii metals; solid metal compound; process for manufacturing a fresh catalyst
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 H 2 XO 4 , wherein X = W 1-y Mo y , 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; separating the one or more Group VIB metal oxides from the one or more Group VIII metals; 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; and f) transforming the precipitate by adding an acid to form a solid metal compound comprising one or more Group VIB metals.
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机译:从催化剂中回收VIB族金属的方法本发明涉及一种从催化剂中回收VIB族金属的方法,所述催化剂特别是废催化剂,其包含一种或多种VIB族金属和一种或多种VIII族金属。此外,本发明涉及可通过根据本发明的方法获得的具有通式H 2 XO 4的固体VIB族金属化合物,其中X = W 1-y Mo y,其中y在0至1之间。在制造新鲜催化剂的过程中。该方法包括以下步骤:a)将一种或多种VIB族金属氧化为一种或多种VIB族金属氧化物;从一种或多种第VIII族金属中分离出一种或多种VIB族金属氧化物;将一种或多种VIB族金属氧化物溶解在水中以产生一种或多种VIB族金属氧化物的水溶液; d)通过向水溶液中添加碱土金属(IIa族)离子,从水溶液中沉淀出一种或多种VIB族金属氧化物; e)可选地过滤和洗涤沉淀物; f)通过加入酸来转化沉淀物以形成包含一种或多种VIB族金属的固体金属化合物。
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