Oil refining and alkali for the reaction of the. The boiling method is the main method of the method, and the soap pot is cylindrical or square.
In addition to pipeline with oil, water, salt and alkali, but also equipped with direct steam or steam coils, with steam and stir soap material. The pot is also provided with a head pipe, the upper pipe can be put in any level to the emission of soap material. The bottom of a cone with a discharge tube residual liquid can be released after the rest of the discharge tube head. Grease and caustic soda in the soap pot boiling to saponification rate of about 95%, soap material is closed even when stop operation of saponification.