METHOD FOR PRODUCING REGENERATED CLAY, REGENERATED CLAY, AND METHOD FOR PRODUCING PURIFIED FATS AND OILS

摘要

The invention provides a method that regenerates the bleaching capacity of spent clay, which has been used for purification of fats and oils, easily and simultaneously with production of a compound with which thermal recycling from oil components in the spent clay into biofuel is possible. That is, this method for producing purified fats and oils comprises: a method for producing regenerated clay characterized in that spent clay that has been used in fat and oil purification is mixed with a lower alcohol and an acid catalyst, and the extraction of oil components from said spent clay is performed simultaneously with an esterification reaction of the fats and oils and/or free fatty acids in said oil components with the lower alcohol to regenerate the bleaching capacity of the spent clay; the regenerated clay produced by said method for producing regenerated clay; and a process of bleaching fats and oils using said regenerated clay.