Regeneration of catalyst, method for regeneration of spent catalyst of a spray process and use thereof

CN122105471APending Publication Date: 2026-05-29SHANDONG SAIKESAISI HYDROGEN ENERGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG SAIKESAISI HYDROGEN ENERGY
Filing Date
2026-04-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing technologies are insufficient for the efficient recovery and regeneration of waste catalysts generated during the spraying process, leading to the waste of precious metal resources and environmental pollution. At the same time, the catalytic activity and stability are difficult to restore.

Method used

Waste catalyst from the spraying process was treated by heating and pressurizing dissociation and low-temperature calcination. The particles were initially dispersed by ultrasonic cleaning, dissociation treatment removed ionomers, and low-temperature calcination controlled the particle size and surface state to restore catalytic activity.

Benefits of technology

It achieves efficient catalyst regeneration, restoring electrocatalytic activity to 95%-100% of that of fresh catalyst, reducing raw material costs, improving resource recycling efficiency and value, and conforming to the concept of green manufacturing.

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Abstract

The present application relates to the recycling regeneration technology of catalyst waste, in particular to a regenerated catalyst, a regeneration method of spray process waste catalyst and application thereof.The regenerated catalyst comprises active components and fluorine elements, the active components are iridium oxide or iridium platinum alloy, the mass content of fluorine elements is 0.1-1%, and the average particle size is 30-260nm.The regeneration method is as follows: adding the anode waste produced in the spray film electrode process into a first cleaning solvent, performing ultrasonic cleaning, heating and pressurizing to 120-200 DEG C, 0.2-1.5 MPa for dissociation treatment, and then heating to 250-450 DEG C for calcination, and the regenerated catalyst is obtained.The regeneration method provided by the present application can not only efficiently recover the catalytic active components, but also regenerate the regenerated catalyst with specific chemical components and surface state and excellent electrochemical catalytic performance, so that the waste catalyst can be directly reused in the production end with high value.
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