Interesterification consists in modifying the physical properties of the oil by an interchange of fatty acids between and inside the different triglycerides, by mean of a catalyst operating at about 100°C and under vacuum.??
The purpose of the interesterification process is to:
- change the overall melting profile,
- improve the compatibility of the triglycerides in the solid state,
- improve the plasticity of the resulting solid by changing the crystallisation properties,
- combine the properties of mixed oils and fats.
Interesterified oils are used mainly in coating fats, margarine, sweets, shortening, pastry and speciality fats.