The process consists of two stages: pretreatment of crude
palm oil by degumming and bleaching, followed by
deodorization and deacidification by molecular distillation.
The pretreatment, which removes impurities and
oxidative products from crude palm oil, can be carried
out in a conventional refinery. Crude palm oil is
first treated with phosphoric acid, followed by treatment
with bleaching earth and then filtration