Sodium isopropyl xanthate

Sodium isopropyl xanthate (CAS 140-93-2) is a selective flotation collector used in the concentration of sulfide ores. Also marketed as Proxan-sodium and Aeroxanthate 343.

Where is Sodium isopropyl xanthate used?

• Copper, lead and zinc sulfide processing: selective collection of target minerals at low dosage rates, improving concentrate grade and recovery
• Gold and silver operations: flotation of sulfide-associated precious metals with a short-chain xanthate collector
• Nickel and molybdenum circuits: selectivity over non-sulfide gangue
• Complex polymetallic ores: blended collector formulations with other xanthates or dithiophosphates broaden mineral response
• It adsorbs onto mineral surfaces, rendering them hydrophobic so they attach to air bubbles and separate from gangue during froth flotation.

Commercial specifications

• Standard commercial purity typically 90% or higher
• Packaging in bags and bulk quantities