Method for producing reclaimed white clay, reclaimed white clay, and method for producing refined oil or fat

摘要

A method for producing reclaimed white clay, whereby the decolorizing function of waste white clay is reclaimed, wherein the production method comprises a pretreatment step for maintaining, in a mixed state, a lower alcohol and waste white clay used in the refinement of oils and fats, and a reclamation step. The reclamation step includes admixing an acidic catalyst into the pretreated mixture of the white clay and the lower alcohol, and simultaneously extracting an oily component from the white clay and performing esterification between the lower alcohol and at least one component selected from the group consisting of a free fatty acid and an oil and fat in the extracted oily components.