With precious metal or precious metal compounds as the active substance
Reaction initiators, reaction accelerators and catalytic preparations, not elsewhere specified or included: > Supported catalysts: > With precious metal or precious metal compounds as the active substance
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.13, 9903.88.18, 9903.88.33, 9903.88.34, 9903.88.35, 9903.88.36, 9903.88.37, 9903.88.38, 9903.88.40, 9903.88.41, 9903.88.43, 9903.88.45, 9903.88.46, 9903.88.48, 9903.88.56, 9903.88.64, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(e) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(f)
Products classified under HTS 3815.12.00
Platinum Supported Catalyst for Automotive Catalytic Converters
This supported catalyst uses platinum as the active substance on an alumina carrier, designed to convert harmful exhaust gases like CO, NOx, and hydrocarbons into less harmful substances in vehicle catalytic converters. It falls under HTS 3815.12.00 because it is a supported catalyst with precious metal (platinum) as the active component. Primarily used in gasoline engine vehicles for emission control.
Palladium on Carbon Catalyst for Hydrogenation Reactions
A 5-10% palladium on activated carbon support used in pharmaceutical and fine chemical manufacturing for selective hydrogenation of double bonds and nitro groups. Classified under HTS 3815.12.00 as a supported catalyst with precious metal (palladium) as active substance. Essential for API synthesis and odor removal in flavors/fragrances.
Rhodium/Alumina Catalyst for Acetic Acid Production
High-surface-area rhodium on gamma-alumina support used in the Monsanto process for methanol carbonylation to produce acetic acid. HTS 3815.12.00 classification applies due to precious metal rhodium as active catalytic substance on ceramic support. Industrial scale catalyst for commodity chemical production.
Platinum/Palladium Diesel Oxidation Catalyst
Bimetallic Pt/Pd on cordierite honeycomb support for diesel engine oxidation of CO and HC emissions. Falls under HTS 3815.12.00 as supported catalyst with precious metal compounds active substance. Used in heavy-duty truck and off-road equipment exhaust systems.
Iridium Oxide Supported Catalyst for Hydrazine Decomposition
Iridium oxide on alumina or titania support for catalytic decomposition of hydrazine in spacecraft propulsion systems. HTS 3815.12.00 due to precious metal iridium compound as active substance. Aerospace-grade catalyst for attitude control thrusters.
Gold on Titania Catalyst for CO Oxidation
Nanosize gold particles (2-5nm) supported on TiO2 for low-temperature carbon monoxide oxidation in air purification and fuel cell applications. Classified HTS 3815.12.00 as supported precious metal catalyst. Used in respiratory protection and proton exchange membrane fuel cell startup.
Platinum Black Supported Electrode Catalyst
High-surface-area platinum black on carbon cloth for polymer electrolyte membrane fuel cells (PEMFC). HTS 3815.12.00 as supported precious metal catalyst for electrochemical applications. Key component in hydrogen fuel cell stacks for vehicles and stationary power.
Palladium on Barium Sulfate for Rosenmund Reduction
Poisoned 5% Pd/BaSO4 catalyst (with quinoline) for selective hydrogenation of acid chlorides to aldehydes (Rosenmund reduction). HTS 3815.12.00 classification for supported precious metal catalyst. Classic organic synthesis catalyst still used in pharma production.
Ruthenium on Alumina for Ammonia Synthesis Alternative
Promoted ruthenium on high-alumina support as lower-pressure alternative to iron-based Haber-Bosch ammonia synthesis catalysts. Classified HTS 3815.12.00 for precious metal supported catalyst. Used in small-scale fertilizer production and hydrogen economy applications.
Platinum/Rhodium Gauze Packs for Nitric Acid Plants
80/20 Pt/Rh knitted wire gauze catalyst packs for ammonia oxidation in Ostwald process nitric acid production. HTS 3815.12.00 as precious metal supported catalyst (metallic support). Industrial packs contain hundreds of gauzes per reactor.
Silver/Alumina Catalyst for Ethylene Oxide Production
15-20% silver on low-surface-area alpha-alumina promoted with cesium for selective epoxidation of ethylene to ethylene oxide. HTS 3815.12.00 classification (silver as precious metal). Primary catalyst for global EO production.
Palladium Membrane Catalyst for Hydrogen Purification
Thin-film palladium on porous ceramic or metal support for simultaneous hydrogen separation and purification via diffusion. Dual function as catalyst and membrane under HTS 3815.12.00. Used in ultra-pure hydrogen production for semiconductors and fuel cells.
Platinum on Silica for Polymerization Processes
Highly dispersed platinum on mesoporous silica gel for olefin polymerization and alkylation reactions in petrochemical processes. HTS 3815.12.00 as supported precious metal catalyst. Enables shape-selective polymerization.
Rhodium on Carbon for Hydroformylation Reactions
Soluble rhodium complexes adsorbed on activated carbon for supported liquid-phase hydroformylation of propene to butanal. HTS 3815.12.00 classification. Used in Oxo alcohol production.
Mixed PGM on Ceria-Zirconia for TWC Front Bed
Pd-Pt-Rh ternary precious metal catalyst on ceria-zirconia oxygen storage support for three-way converter front bed position. HTS 3815.12.00 as multi-precious metal supported catalyst. Optimizes cold-start emissions performance.