Extraction of Garlic Oil by Molecular Distillation Method

Effects of different factors on extraction and separation efficiency of garlic oil were explored by using modern molecular distillation technology on the basis of Box-Behnken design principle and response surface analysis. The optimal extraction processing parameters were system pressure of 105 Pa, material-feeding rate of 1.2 g/min, material-feeding temperature of 40-55 ℃ and distillation temperature of 45.1 ℃. Under the optimal processing conditions, the quality of garlic oil was markedly improved, and the average yield of garlic oil was 0.476%. The content of water in garlic oil was 0.15% and the purity of garlic oil was up to 99.85%.