Fractionation of rapeseed meal into hour and hull components

Fine-ground rapeseed meal can be fractionated by liquid cyclone processes into flour and hull fractions. The process can be applied to expeller meal or to the marc after solvent extraction. A nonpolar solvent such as hexane is particularly effective because residual oil in the products is also substantially reduced. The flour, obtained in yield of about66% of the meal, contained over 45% protein and 5-8% of crude fiber. Rapeseed meal is relatively low in digestible energy and the flour fraction would have greater application as a protein supplement in pig and poultry feeds.