Sinopec has been granted an invention patent: “A silicon-trapping agent with high silicon capacity and its preparation method””

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Sinopec has been granted an invention patent: “A silicon-trapping agent with high silicon capacity and its preparation method” 2025-10-04 02:58· According to data from the Tianyancha app, Sinopec (600028) has received a new invention patent grant; the patent is titled “A silicon-trapping agent with high silicon capacity and its preparation method”, with the patent application number CN202211345526.4. The date of grant was October 3, 2025. Patent abstract: A silicon-trapping agent with high silicon capacity, comprising graphene and alumina; the content of alumina is 5–35 wt%, with the remainder being graphene ； Alumina is distributed on the surface of graphene ； The specific surface area of the silicon capture agent is 400–1000 m2/g, and the surface hydroxyl content is 600–1000 μmol/g. A silicon-trapping agent is obtained by carrying the aluminum source solution and the precipitant solution in co-current to an aqueous solution containing graphene and organic additives for a coprecipitation reaction, then mixing it uniformly with a glue solvent and a extrusion aid for extrusion molding, and drying it in an inert atmosphere. This invention introduces graphene with a large specific surface area, and organic additives are added during the preparation process to enhance the hydrophilicity of graphene. This facilitates the precipitation of alumina on the surface of graphene, increases the hydroxyl content on its surface, allowing more AlOH groups to be exposed at the surface. The large specific surface area also enables more silicides to deposit on the catalyst surface, thereby improving the efficiency and lifespan of the silicon capture agent.