Question

2. Soya bean seeds are extracted with hexane in batch extractor. The flaked seeds contain 19% oil,70%solids and 11% moisture. At the end of the extraction process, cake is separated from the hexane oil mixture. The cake analysis yields 0.7% oil,89.3% solids and 10% moisture. Find the percentage recovery of oil. All percentages are by weight.( 1.5 Marks)

Answer 1

Basis Now 100 kg saya been seeds. as to question composition is. 19 kg – oil To kg - solids. kg a moisture Now process is Hexane toil. H I oidt moisture & solid. 0.71 89. 31 104. Hexane Let assume moisture s solids are insoluble in Hexane. that mean only oil is extracted.. & so to kg oil s 11 kg moisture are [8 g 3 + 10] 1. of cake. » Bilg - 99.3.'), of cake ) total wto ot cake a x 100 = 81.51 kg = 99.3 x 100 y oil in cake = 81.5 x 07 - 0.57 kg 10o & Recovery of oil = $ 19-0.57 Lx100 19 - 96.99 ).