The invention relates to the technical field of
soap making, and particularly relates to a method for fast and continuously saponifying
grease. The method sequentially comprises the following steps: A, blending, namely uniformly mixing the
grease and
fatty acid in proportion to obtain mixed liquor; B,
saponification, namely respectively heating the mixed liquor and liquid caustic soda, mixing the heated mixed liquor and the heated liquid caustic soda to carry out
saponification reaction, and adding to a brine solution with an additive so as to obtain a
soap base after the
saponification reaction is completed; C,
soap pellet forming, namely carrying out vacuum
spray drying,
extrusion, homogenization, refining and pellet
cutting on the soap base to obtain a soap pellet, wherein 60-80 parts by weight of the
grease and 20-40 parts by weight of the
fatty acid are fed. The saponification method disclosed by the invention has the advantages of continuity, stability, fast
reaction rate, short reaction time, high production efficiency, less
energy consumption, low production cost and large-scale industrial production.