Flotation Process - an overview | ScienceDirect
Protective Colloids: Depressants: Hydroxyl Carboxyl: Polymers: starch, dextrin, carboxy methyl cellulose, etc. Modifiers, Coal depressants: The use of liquid hydrocarbons ('oils') as collectors in flotation of coal is characteristic for the group of inherently hydrophobic minerals (graphite, sulfur, molybdenite, talc, coals are classified in this group). Since oily collectors are water