Method for producing reclaimed white clay, reclaimed white clay, and method for producing refined fats and oils

摘要

The present invention is a method for simultaneously and easily carrying out the regeneration of the decolorizing ability of waste white clay used for the purification of fats and oils and the production of a compound capable of thermal recycling as a biofuel from the oily component in the waste white clay. I will provide a. That is, in the method for producing a refined fat according to the present invention, waste white clay used for oil refinement, a lower alcohol, and an acidic catalyst are mixed, extraction of the oil component from the waste white clay, A method for producing reclaimed white clay, characterized by simultaneously performing esterification reaction of fats and oils and / or free fatty acids and the lower alcohol to regenerate the decolorizing ability of the waste white clay; produced by the method for producing reclaimed white clay Reclaimed white clay; including a step of decolorizing oil and fat using the reclaimed white clay.