Method for short-process all-component echelon recovery of waste hydrogenation catalyst

By employing suspension boiling roasting and extraction-back-extraction technologies, the problems of long process flow, high energy consumption, and low purity in the recovery of waste hydrogenation catalysts have been solved, achieving efficient recovery of all components and improving the purity and resource utilization rate of vanadium-molybdenum products.

CN120989390AActive Publication Date: 2025-11-21BEIJING MINING & METALLURGICAL TECH GRP CO LTD
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Patent Information

Application Number
CN202511535218.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-27
Publication Date
2025-11-21
Estimated Expiration
2045-10-27

AI Technical Summary

Technical Problem

Existing methods for recovering spent hydrogenation catalysts suffer from problems such as long process flow, high energy consumption, low vanadium and molybdenum recovery rate, poor product purity, and low resource utilization. Furthermore, the reaction of sulfur with sodium carbonate during roasting leads to high consumption of sodium carbonate reagents and high costs.

Method used

By employing a combination of suspension boiling roasting and extraction and back-extraction techniques, vanadium-molybdenum products are separated through sodium carbonate mixed roasting, water leaching, extractant extraction, and strong and weak alkaline back-extraction treatment. Aluminum and nickel are then recovered through sintering and reduction smelting, simplifying the pretreatment steps.

Benefits of technology

It achieves a vanadium-molybdenum recovery rate of over 95%, a product purity of over 99%, an aluminum recovery rate of over 85%, and a nickel recovery rate of over 98%, significantly reducing energy consumption, simplifying the process flow, and improving resource utilization.

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Abstract

The invention provides a method for short-process all-component echelon recovery of a waste hydrogenation catalyst, and relates to the field of solid waste treatment. The recovery method of the waste hydrogenation catalyst comprises the following steps: roasting the waste hydrogenation catalyst and sodium carbonate to obtain a roasted product; the roasted product is leached with water, and leaching liquid and leaching residues are obtained; extracting the leaching solution by using an extracting agent to obtain a vanadium-molybdenum-containing organic phase, sequentially carrying out reverse extraction treatment on the vanadium-molybdenum-containing organic phase by using a strong alkaline reverse extraction agent and a weak alkaline reverse extraction agent to obtain a vanadium reverse extraction solution and a molybdenum reverse extraction solution, and carrying out vanadium precipitation treatment on the vanadium reverse extraction solution to obtain ammonium metavanadate; acidizing the molybdenum strip liquor to precipitate molybdenum to obtain ammonium molybdate; carrying out sintering treatment on the leaching residues and alkaline substances, leaching obtained calcine with water to obtain water leaching residues and filtrate, and carrying out aluminum precipitation treatment on the filtrate to obtain aluminum hydroxide, aluminum oxide or pseudo-boehmite; and reducing and smelting the water leaching residues to obtain the ferro-nickel alloy. According to the invention, multi-element comprehensive recovery of all components of vanadium, molybdenum, nickel, aluminum and sulfur can be realized, and high-value utilization of all components of the waste hydrogenation catalyst is realized.
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