Sulfonated Asphalt, Modified Starch, Lubricant manufacturer / supplier in China, offering Humic Acid Sodium Salt / Causticized Lignite/ Sodium Humate, Reduce The Hthp Filtration Loss of Oil-Based Mud Organic Lignite/Organophilic Lignite, Low Viscosity Polyanionic Cellulose PAC-LV Filtration Control Agents and so on.