1)the content of 72%,98% and 99%Caustic Soda flake is available . 2)capacity:420000mt per year 3)enjoy 64 years' histroy 1. YIBIN TIANYUAN, with 67 year’s history of the Caustic Soda manufacturing, is one of the earliest chlor-alkali manufacturers in China. AT the end of 1980s, as the graphite anode electrolyzes were replaced by the metallic anode electrolyzes, the quality and quantity of our ...