Method for recovering vanadium, aluminum and molybdenum from waste catalyst
A waste catalyst, vanadium-aluminum technology, applied in the field of recovering vanadium-aluminum-molybdenum, can solve the problems of high energy consumption, serious dust, long reaction time, etc., and achieve the effects of high extraction rate, strong oxidization, and high purity
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[0057] Example 1
[0058] The embodiment provides a method for recovering vanadium, aluminum and molybdenum from waste catalyst, which comprises the following steps:
[0059] (1) mixing waste catalyst containing vanadium, aluminum and molybdenum with 20wt%% sodium hydroxide solution according to the liquid-solid ratio of 3:1 to obtain reaction slurry; The waste catalyst contains vanadium, aluminum and molybdenum; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst with a composition of V. 2 O 5 :10.51wt%,Al 2 O 3 :22.15wt%,MoO 3 :2.96wt%,NiO:2.94wt%;
[0060] (2) placing the reaction slurry in the step (1) in a reaction kettle, wherein the reaction kettle is equipped with a conventional pressing mechanical stirring paddle and an aerator, wherein the aerator consists of a motor, a hollow stirring shaft, a hollow impeller and the like;
[0061] The impeller of aerator is located below the stirring paddle of the reaction kettle, with a diameter ...
Example Embodiment
[0063] Example 2
[0064] The embodiment provides a method for recovering vanadium, aluminum and molybdenum from waste catalyst, which comprises the following steps:
[0065] (1) mixing waste catalyst containing vanadium, aluminum and molybdenum with 25wt%% sodium hydroxide solution according to the liquid-solid ratio of 4:1 to obtain reaction slurry; The waste catalyst contains vanadium, aluminum and molybdenum; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst with a composition of V. 2 O 5 :8.32wt%,Al 2 O 3 :25.22wt%,MoO 3 :3.07wt%,NiO:2.35wt%;
[0066] (2) placing the reaction slurry in the step (1) in a reaction kettle, wherein the reaction kettle is equipped with a conventional pressing mechanical stirring paddle and an aerator, wherein the aerator consists of a motor, a hollow stirring shaft, a hollow impeller and the like;
[0067] The impeller of the aerator is located below the stirring paddle of the reaction kettle, with a diamet...
Example Embodiment
[0069] Example 3
[0070] The embodiment provides a method for recovering vanadium, aluminum and molybdenum from waste catalyst, which comprises the following steps:
[0071](1) mixing waste catalyst containing vanadium, aluminum and molybdenum with 30wt%% sodium hydroxide solution according to the liquid-solid ratio of 5:1 to obtain reaction slurry; The waste catalyst contains vanadium, aluminum and molybdenum; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst with a composition of V. 2 O 5 :9.76%,Al 2 O 3 :20.21%,MoO 3 :2.32%,NiO:3.23%;
[0072] (2) placing the reaction slurry in the step (1) in a reaction kettle, wherein the reaction kettle is equipped with a conventional pressing mechanical stirring paddle and an aerator, wherein the aerator consists of a motor, a hollow stirring shaft, a hollow impeller and the like;
[0073] The impeller of aerator is located below the stirring paddle of the reaction kettle, with a diameter of 25m and...
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