Abstract:

Single factor combined with orthogonal test design was applied to optimize extraction technology of oil from crushed almond seeds with supercritical CO2. Range analysis for results of orthogonal test showed that effects of four key factors on extraction yield of almond oil declined in the following order: extraction pressure ＞ extraction duration ＞ extraction temperature ＞ particle size of almond seed powder; the optimum extraction pressure, temperature and duration, and particle size of almond seed powder were 30 MPa, 50 ℃, 2.5 h, and 40 mesh, respectively. Under this condition, the extraction yield of almond oil was 49.85%.

Key words: apricot, almond oil, supercritical CO2 extraction