Tungsten Oxide Hydrodesulfurization Catalyst from Japan
Tungsten oxide (WO3) catalysts promoted with nickel or cobalt are used for hydrodesulfurization of petroleum fractions. This inorganic tungsten compound functions as a reaction accelerator and is not a separate chemically defined element. It falls under tariff item 3815.90.00 as a supported catalyst preparation.
Duty Rate — Japan → Canada
0%
Import Tips
• Ensure the catalyst is not classified as a pure tungsten oxide compound
• Provide details on the support material and promoters
• Verify compliance with Canadian petroleum refining regulations