[ Chemicals for industrial purposes; ] chemicals for use in the mining and hydrometallurgical industries, namely, unprocessed polymers, flocculants, coagulants, dispersants for treating tailings, slurries, metal waste powder; chemicals for industrial use, namely, flocculating and coagulation agents for use in mining operations, [ paper manufacturing; chemicals for industrial use, namely, flocculating and coagulation agents for use in water and effluents treatment; chemicals for industrial use...