Process for the dry fractionation of oils and fats having a steep dilatation/temperature line and use of the fractionated fats in margarines and shortenings

摘要

The dry fractionation of oils and fats having a steep dilatation curve (A), i.e. exhibiting a difference in dilatation value at 15 DEG C. and 25 DEG C. of at least 800 mm3/25 grammes, in practice is difficult. This problem is solved by mixing oils and fats (A) with triglycerides (B) of such nature that the difference in dilatation of the mixture obtained diminishes substantially. The triglycerides (B) have a difference in dilatation values at 15 DEG C. and 25 DEG C. not exceeding 600 mm3/25 g. The weight ratio between fats (A) and fats (B) varies between (10-90):(90-10), preferably (20-80):(80-20) and ideally (40-60):(60-40). The process is e.g. particularly attractive for the dry fractionation of palmkernel oil (fat A) in the presence of palm oil (fat B).