A mixed amine extractant for the separation of molybdenum and vanadium and a method for separating and recovering molybdenum and vanadium from spent catalysts

A waste catalyst, separation and recovery technology, applied in the direction of improving process efficiency, etc., can solve the problems that the separation of vanadium and molybdenum cannot be realized, and the separation coefficient is not much different.
CN109022797BActive Publication Date: 2020-07-07肇庆市珈旺环境技术研究院
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
肇庆市珈旺环境技术研究院
Publication Date
2020-07-07

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Abstract

The invention relates to a mixed amine extractant for the separation of molybdenum and vanadium and a method for separating and recovering molybdenum and vanadium from waste catalysts. The mixed amine extractant includes imidazole compounds and quaternary ammonium salt compounds, which are separated from waste catalysts. The method for recovering molybdenum and vanadium is as follows: the waste catalyst containing molybdenum and vanadium is leached with alkali to obtain a leach solution containing molybdenum and vanadium, and the leach solution containing molybdenum and vanadium is extracted and separated by an organic phase containing a mixed amine extractant, and the raffinate The solution is a molybdenum-containing solution, and the loaded organic phase is washed and stripped to obtain a vanadium-containing solution; the mixed amine extractant has the characteristics of large saturation capacity, short phase separation time, excellent extraction and stripping performance, and high separation coefficient of molybdenum and vanadium. The method can realize high-efficiency separation of vanadium and molybdenum in the alkaline solution system, and has good industrial application prospects.
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Description

technical field

[0001] The present invention relates to a combined extractant, and also relates to a method for separating and recovering molybdenum and vanadium from waste catalyst leaching liquid by using the combined extractant, so as to realize resource utilization of hazardous solid waste containing molybdenum and vanadium spent catalyst, which belongs to the resource recovery and utilization of solid waste field of hydrometallurgy. Background technique

[0002] Due to the over-exploitation of molybdenum-vanadium mineral resources and the rapid development of science and technology, the application range of molybdenum, vanadium and their compounds is continuously expanding, and the consumption is increasing day by day. The limited resources are decreasing day by day, and the grade of ore is gradually decreasing. Therefore, how to effectively enrich valuable metals such as molybdenum and vanadium and separate them from other high-content impurities is a test for domesti...

Claims

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