... ., Ltd. locates in Qingdao,the beautiful seaside city ,which engages in the manufacturing and marketing of Sodium sulfate , Cryolite , ... more than 50,000 aquare meters ,with an annual production capacity of flocculants up to 20,000 tons, ... and technical developers specializing in the research of those chemicals.With the consistent quality ,reliable technical performance and competitive price,gains high ...