Method for recovering metallic oxide from waste aluminum base V-Mo-Ni catalyst

Abstract

The invention discloses a method for recovering metal oxides from an aluminum scrap-based vanadium molybdenum nickel catalyst. The method comprises the following steps: crushing the aluminum scrap-based vanadium molybdenum nickel catalyst, evenly mixing with sodium hydroxide, calcining at high temperature of 700-1200 DEG C, maintaining a constant temperature for 3-6 hours, crushing sinter blocks, washing nickel slag with countercurrent hot water or washing aluminum hydroxide crystal with the weight ratio of liquid to solid being 5-10:1 at the temperature of 80-100 DEG C for 1.5-3 hours, acid leaching and precipitating and filtering to obtain Al(OH)3, adding ammonium salt to filtrate, filtering to obtain ammonium metavanadate, extracting molybdenum from the filtrate in which the ammonium metavanadate is filtered, recovering the nickel by acid leaching, hydrolyzing the filtrate for removing impurities from the nickel, condensing and drying to produce crystal nickel sulfate. Comprehensive recovery improves environment conditions, and creates good economic benefit; comprehensive use of secondary resources relieves the insufficient domestic resources, and protects the environment; and the recovery method has simple process and low recovery cost and is applicable to large-scale use.

Description

technical field

[0001] The invention relates to a method for recovering metal oxides from waste aluminum-based vanadium-molybdenum-nickel catalysts. Background technique

[0002] Aluminum-based catalyst refers to a catalyst that uses alumina as a carrier and fixes active components such as noble metals or metals such as nickel, cobalt, vanadium, molybdenum, or their oxides on alumina, also known as a catalyst. In the petrochemical industry, aluminum-based molybdenum catalysts are generally used to desulfurize crude oil. During the desulfurization process, aluminum-molybdenum catalysts will absorb a large amount of impurity elements such as vanadium, nickel, phosphorus and iron from crude oil, resulting Molybdenum catalysts are poisoned and discarded as waste aluminum-based vanadium-molybdenum-nickel catalysts. According to investigations, the number of waste aluminum-based vanadium-molybdenum-nickel catalysts eliminated by the petrochemical sector due to desulfurization oper...

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