The strongest xanthate collector — built for maximum recovery on oxidized sulfide surfaces.
High collecting-power flotation; oxidized/tarnished sulfide surfaces; gold recovery from sulfide ore.
High collecting-power flotation on oxidized or tarnished sulfide surfaces, and gold recovery from sulfide ore.
Less selective — it's the strongest collector of the three, trading selectivity for maximum recovery.
Yes — many circuits combine collectors across stages, using PAX in rougher stages and a more selective collector like PEX in cleaner stages.