A method for recycling spent hydrogenation catalyst

By employing hydrothermal treatment and vanadium deposition on activated carbon, the problems of complex processes and low activity in the recovery of hydrogenation catalysts have been solved, achieving efficient metal recovery and catalyst activity enhancement, and is applicable to the reuse of nickel-molybdenum catalysts.

CN118437345BActive Publication Date: 2026-02-06CHINA PETROLEUM & CHEMICAL CORP +1
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Patent Information

Application Number
CN202310051355.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-02
Publication Date
2026-02-06
Estimated Expiration
2043-02-02

AI Technical Summary

Technical Problem

Existing methods for recovering and reusing hydrogenation catalysts suffer from problems such as complex process steps, low recovery rates of active metals and/or supports, and low activity and short lifespan of the prepared catalysts.

Method used

A highly active and long-life hydrogenation catalyst was prepared by using hydrothermal treatment combined with activated carbon and boehmite to crystallize an alumina support through a mixture of water-soluble polymer and ammonia, forming a macroporous structure. The catalyst also utilized the synergistic effect of vanadium deposition by activated carbon and alcohol surfactants.

Benefits of technology

The comprehensive metal recovery rate of nickel-molybdenum based waste catalysts has been improved. The prepared catalyst exhibits high activity and long life in the hydrogenation reaction of residue oil. At the same time, the process is simple, environmentally friendly and low cost.

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Abstract

The application discloses a kind of recycling methods of waste hydrogenation catalyst.The method comprises: waste hydrogenation catalyst is extracted, and the solid obtained is calcined to obtain material I;Material I, water-soluble polymer and ammonia are mixed and then hydrothermally treated, and the filtrate I and material II are obtained by filtration;The filtrate I and gallium nitrate solution are mixed and then impregnated on activated carbon, and dried;The dried activated carbon is formed with material II, pseudo-boehmite, adhesive, extrusion aid and water, and then calcined;Then, the impregnation solution is used to impregnate the calcined product, and then aged, dried and calcined to obtain a hydrogenation catalyst.The catalyst prepared by the method has high activity and long service life when applied to residue oil hydrogenation reaction.The method is particularly suitable for recycling and reusing nickel-molybdenum catalyst.
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Citation Information

Patent Citations

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