The method and process which aimed to recover both the molybdenum and the cobalt from spent catalyst were introduced in this paper. The procedures for recovery and separation of molybdenum and cobalt, such as roasting, impurity removing, molybdenum leaching and cobalt leaching etc. were studied, and...
The method and process which aimed to recover both the molybdenum and the cobalt from spent catalyst were introduced in this paper. The procedures for recovery and separation of molybdenum and cobalt, such as roasting, impurity removing, molybdenum leaching and cobalt leaching etc. were studied, and various factors which affect the leaching rate of molybdenum and cobalt were discussed. Finally , a reasonable recovery method and technological conditions were reported. The results show that the better conditions of molybdenum leaching using alkai are as follows: catalyzer granularity(0.154 mm), baking temperature(750 °C) , ratio of liquid and solid(3:l) , lixiviate time(4 h) , leaching temperature (90 °C), and that the corresponding leaching rate reaches over 95 % . Recovering cobalt in two steps using acid improve the lixiviate effect, and high leaching rates (more than 85 %) of cobalt will be obatined.
The method and process which aimed to recover both the molybdenum and the cobalt from spent catalyst were introduced in this paper. The procedures for recovery and separation of molybdenum and cobalt, such as roasting, impurity removing, molybdenum leaching and cobalt leaching etc. were studied, and various factors which affect the leaching rate of molybdenum and cobalt were discussed. Finally , a reasonable recovery method and technological conditions were reported. The results show that the better conditions of molybdenum leaching using alkai are as follows: catalyzer granularity(0.154 mm), baking temperature(750 °C) , ratio of liquid and solid(3:l) , lixiviate time(4 h) , leaching temperature (90 °C), and that the corresponding leaching rate reaches over 95 % . Recovering cobalt in two steps using acid improve the lixiviate effect, and high leaching rates (more than 85 %) of cobalt will be obatined.
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