Other
Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included. > Supported catalysts: > Other > Other
Duty Rate (from China)
Products classified under Tariff item 3815.90.00.00
Ammonium Molybdate Catalyst
Ammonium heptamolybdate ((NH4)6Mo7O24) is used as a selective oxidation catalyst in acrylic acid production. This inorganic molybdenum-based catalytic preparation functions as a reaction accelerator. It is not a separate chemically defined element and qualifies for tariff item 3815.90.00.
3815.90.00Bismuth Molybdate Selective Oxidation Catalyst
Bismuth molybdate (Bi2Mo3O12) is a mixed metal oxide catalyst used for the selective oxidation of propylene to acrolein. It is a supported catalyst preparation designed to accelerate specific chemical reactions, falling under the 'other' category of supported catalysts. Its inorganic composition and catalytic function align with tariff item 3815.90.00.
3815.90.00Bismuth Nitrate Catalyst
Bismuth nitrate is an inorganic bismuth salt used as a catalyst in organic synthesis, including esterification and oxidation reactions. It functions as a reaction initiator or accelerator in chemical processes, qualifying as a catalytic preparation. This product is not a separate chemically defined element and is not excluded by chapter notes, so it fits under tariff item 3815.90.00.
3815.90.00Bismuth Subnitrate Catalytic Promoter
Bismuth subnitrate is a basic bismuth nitrate used as a promoter in automotive catalytic converters and NOx reduction systems. It enhances the thermal stability and activity of the catalyst, functioning as a reaction accelerator. This inorganic preparation is not a separate chemically defined compound and is suitable for tariff item 3815.90.00.
3815.90.00Bismuth Triflate Reaction Initiator
Bismuth(III) triflate is a water-tolerant Lewis acid catalyst used in aldol reactions and glycosylations. It acts as a reaction initiator in organic synthesis, and its inorganic bismuth content qualifies it as a catalytic preparation. This product is not a separate chemically defined element and falls under tariff item 3815.90.00.
3815.90.00Mercuric Sulfate Catalyst
Mercuric sulfate (HgSO4) is a preparation used as a catalyst in acetylene hydration to acetone production. This inorganic mercury compound acts as a reaction initiator and is not a separate chemically defined element. It falls under tariff item 3815.90.00, subject to environmental regulations on mercury.
3815.90.00Tungsten Carbide Catalyst Powder
Tungsten carbide catalyst powder is a heterogeneous catalyst used in Fischer-Tropsch synthesis and hydrocracking. It consists of inorganic tungsten compounds designed to accelerate chemical reactions, qualifying as a supported catalyst preparation. This product is not a separate chemically defined element and fits under tariff item 3815.90.00.
3815.90.00Tungsten Disulfide Solid Lubricant Catalyst
Tungsten disulfide (WS2) nanoparticles function as both a solid lubricant and a catalyst in tribochemical reactions. As an inorganic tungsten compound, it accelerates chemical reactions and is used in aerospace and high-performance applications. This product is a catalytic preparation, not a separate chemically defined element, and falls under tariff item 3815.90.00.
3815.90.00Tungsten Nitride Ammonia Synthesis Catalyst
Tungsten nitride (W2N) is a catalytic phase used for high-pressure ammonia synthesis as an alternative to the Haber-Bosch process. This inorganic nitride acts as a reaction accelerator, and its nitrogenase-inspired structure enhances catalytic activity. It is not a separate chemically defined element and qualifies for tariff item 3815.90.00.
3815.90.00Tungsten Oxide Hydrodesulfurization Catalyst
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.
3815.90.00Tungsten Phosphide Hydrogenation Catalyst
Tungsten phosphide (WP) nanoparticles are emerging as non-noble metal catalysts for hydrodeoxygenation of pyrolysis oils. This inorganic tungsten phosphide acts as a reaction initiator, offering high activity comparable to traditional sulfide catalysts. It is not a separate chemically defined element and fits under tariff item 3815.90.00.
3815.90.00Vanadium Boride SCR Catalyst Promoter
Vanadium boride (VB2) is used as a promoter in selective catalytic reduction (SCR) systems for NOx control. This inorganic vanadium compound accelerates ammonia-SCR reactions and enhances low-temperature activity. It is not a separate chemically defined element and qualifies for tariff item 3815.90.00.
3815.90.00Vanadium Pentoxide Catalyst
Vanadium pentoxide (V2O5) is the primary catalyst for sulfuric acid production via the contact process. This inorganic vanadium compound acts 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.
3815.90.00Vanadium Phosphate Catalyst
Vanadium phosphorus oxide (VPO) catalyst is used in n-butane selective oxidation to maleic anhydride. This inorganic vanadium compound functions as a reaction accelerator, providing high selectivity. It is not a separate chemically defined element and qualifies for tariff item 3815.90.00.
3815.90.00Vanadium Silicide Metathesis Catalyst
Vanadium silicide (V3Si) is an intermetallic compound used in olefin metathesis reactions under high-pressure conditions. This wholly inorganic vanadium-based catalytic preparation offers unique activity for propene disproportionation. It is not a separate chemically defined element and falls under tariff item 3815.90.00.