Tungsten Oxide Hydrodesulfurization Catalyst
WO3-based catalysts promoted with nickel or cobalt for hydrodesulfurization of petroleum fractions. Falls under HTS 3815.90.1000 when consisting wholly of inorganic tungsten compounds without organic binders. Essential for ultra-low sulfur diesel production.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If containing molybdenum rather than tungsten
Molybdenum roasting residues classified differently from tungsten compounds.
If when extruded with organic binders for shaped catalyst forms
Organic forming agents disqualify from wholly inorganic catalytic preparations.
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Import Tips & Compliance
• XRD analysis confirming crystalline WO3 phase required for classification verification
• Declaration must specify petroleum refining end-use to distinguish from other applications
• Ensure no carbon or organic residues from manufacturing process exceed specification limits
Related Products under HTS 3815.90.10.00
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