... seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , Soda ash , Edible alkali, Polyaluminium Chloride, ... , Polyaluminium Ferric Chloride ,Polymerization iron sulfate , potassium sulfateand Sodium Tripolyphosphate . And our products mainly export to North America,Asia ... mud, paper industries as oil pollution prevention agents. Sodium Tripolyphosphate98%