Acetone residues in soy lecithin

Soybean oil is soluble in acetone and lecithin can’t, acetone can be used to remove soybean oil from the soy lecithin liquid. After mixing with acetone, soybean oil was extracted out, and the remaining acetone insoluble substances were filtered to form a light yellow powder soy lecithin (deoiled). The solvent residues left in the final product may affect the quality of the product. At present, according to the quality control in commercial production, the acetone residue is generally controlled below 20ppm.
Using ultrafiltration production methods to remove soybean oil in soybean phospholipids. Since the acetone is not used during the production process, the physical production method does not have solvent residues.