... point. The city has solid state and two kinds of liquid state to sell the caustic soda: The purely solid caustic soda is ... , skin , glass , pottery ,etc.. 3. Use: For the papermaking , production of cellulosic thick liquid and dregs of rice; Used in the soap , formate ... acid , oxalic acid , phenol ,etc.. The petroleum industry is used for refining the petroleum products, is used in the well drilling ...