IMPROVEMENT OF THE LONG-TERM STABILITY OF BIODIESEL

摘要

A PROCESS FOR IMPROVING THE LONG-TERM STABILITY OF BIODIESEL IS DESCRIBED, IN WHICH THE CRUDE ESTER FORMED BY TRANSESTERIFYING A VEGETABLE OR ANIMAL FAT OR OIL WITH METHANOL IS INTENSIVELY AFTERTREATED WITH A STRONG ACID OR WITH A MIXTURE OF A STRONG ACID AND A COMPLEXING AGENT,AND THE ESTER LAYER WHICH IS REMOVED FROM THE EMULSION WHICH IS FORMED IS SUBJECTED TO THOROUGH WATER SCRUBBING AND SUBSEQUENTLY DRIED.(FIG 1)