BIODIESEL PROCESSES IN THE PRESENCE OF FREE FATTY ACIDS AND BIODIESEL PRODUCER COMPOSITIONS

摘要

Glyceride-containing feed for a base catalyzed transesterification with l ower alkanol to make biodiesel is pretreated with glycerin separated during the transesterification to partially convert glycerides with lower alkanol c ontained in the separated glycerin using base catalyst in the separated glyc erin while reducing the free fatty acid and phosphorus compound concentratio ns in the glyceride-containing feed. Unique producer compositions are provid ed by the pretreatment processes.