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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

Active Publication Date: 2020-12-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] In summary, although there have been many studies on the recycling of various elements in spent catalysts, there are problems such as high energy consumption, long reaction time or serious dust, so it is necessary to develop a new method for recycling elements in spent catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] The present embodiment provides a method for recovering vanadium-aluminum-molybdenum from spent catalysts, said method comprising the steps of:

[0059] (1) mix the spent catalyst containing vanadium, aluminum and molybdenum with the sodium hydroxide solution whose mass concentration is 20wt% by liquid-solid ratio 3:1, obtain reaction slurry; Contain vanadium, aluminum and molybdenum in the described spent catalyst; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst, composed of V 2 o 5 : 10.51wt%, Al 2 o 3 : 22.15wt%, MoO 3 : 2.96wt%, NiO: 2.94wt%;

[0060] (2) The reaction slurry described in step (1) is placed in a reactor, and the reactor is equipped with a conventional down-pressing mechanical stirring paddle and an aerator, wherein the aerator is composed of a motor, a hollow stirring shaft and a hollow impeller;

[0061] The impeller of the aerator is located below the stirring paddle of the reactor, the diameter of th...

Embodiment 2

[0064] The present embodiment provides a method for recovering vanadium-aluminum-molybdenum from spent catalysts, said method comprising the steps of:

[0065] (1) mix the spent catalyst containing vanadium, aluminum and molybdenum with the sodium hydroxide solution whose mass concentration is 25wt% by liquid-solid ratio 4:1, obtain reaction slurry; Contain vanadium, aluminum and molybdenum in the described spent catalyst; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst, composed of V 2 o 5 : 8.32wt%, Al 2 o 3 : 25.22wt%, MoO 3 : 3.07wt%, NiO: 2.35wt%;

[0066] (2) The reaction slurry described in step (1) is placed in a reactor, and the reactor is equipped with a conventional down-pressing mechanical stirring paddle and an aerator, wherein the aerator is composed of a motor, a hollow stirring shaft and a hollow impeller;

[0067] The impeller of the aerator is located below the stirring paddle of the reactor, the diameter of the...

Embodiment 3

[0070] The present embodiment provides a method for recovering vanadium-aluminum-molybdenum from spent catalysts, said method comprising the steps of:

[0071] (1) mix the spent catalyst containing vanadium, aluminum and molybdenum with the sodium hydroxide solution whose mass concentration is 30wt% according to the liquid-solid ratio of 5:1 to obtain a reaction slurry; the spent catalyst contains vanadium, aluminum and molybdenum; The waste catalyst is a waste hydrodesulfurization (HDS) aluminum-based petroleum catalyst, composed of V 2 o5 : 9.76%, Al 2 o 3 : 20.21%, MoO 3 : 2.32%, NiO: 3.23%;

[0072] (2) The reaction slurry described in step (1) is placed in a reactor, and the reactor is equipped with a conventional down-pressing mechanical stirring paddle and an aerator, wherein the aerator is composed of a motor, a hollow stirring shaft and a hollow impeller;

[0073] The impeller of the aerator is located under the stirring paddle of the reactor, the diameter of the ...

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PUM

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Abstract

The invention provides a method for recovering vanadium, aluminum and molybdenum from a waste catalyst. According to the method, the oxidizing leaching of an alkaline solution is enhanced through an aeration process, and the solubility of oxygen, and the leaching rate of vanadium, aluminum and molybdenum are improved; and the reaction time is shortened, so that the reaction and energy consumptionof alkaline solution evaporation are reduced. Finally, leachate containing the vanadium, aluminum and molybdenum, and tailings enriched with other valuable elements can be obtained, and resource utilization of the waste catalyst is achieved.

Description

technical field [0001] The invention relates to the technical field of solid waste recovery, in particular to a method for recovering vanadium, aluminum and molybdenum from waste catalysts. Background technique [0002] Hydrodesulfurization (HDS) aluminum-based catalysts are widely used in the petroleum hydrodesulfurization process in the petroleum refining industry. During use, due to the deposition of carbon, sulfur, heavy metals and other substances and the loss or denaturation of active factors in the catalyst, the Catalyst deactivation. The service life of catalysts used for hydrodesulfurization of light crude oil is generally 1-3 years, while the service life of heavy oil HDS catalysts is only 0.5-1 year. According to statistics, about 800,000 tons of waste catalysts are produced in the world every year. Among them, there are about 120,000 tons of waste HDS aluminum-based catalysts. The content of valuable metals such as vanadium, molybdenum, cobalt, and nickel in th...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B21/00C22B34/22C22B34/34
CPCC22B7/006C22B34/225C22B34/345C22B21/003Y02P10/20
Inventor 王少娜杜浩刘彪王健璋吕页清陈东辉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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