Dear sir or madam,Our company is a large chemical industry group which specializes in manufacturing sulfuric acid catalyst, compound fertilizer, sulfuric acid etc.We need to import large quantity of sulfur and sulfurous iron ore for sulfuric acid manufacturing.Besides, we also export vanadium pentoxide catalyst which is specially used to manufacture sulfuric acid. If anyone who need our catalyst, please feel free to contact me.Thanks&best regardsJack Cao Show More