METHOD FOR PREPARING LECITHIN WITH HIGH PURITY USING DRIED SOY BEAN LECITHIN

摘要

PURPOSE: A method for preparing lecithin with high purity using dried soy bean lecithin is provided by using batch count-current by acetone solubles as an extracting method, thereby, use of acetone is minimized and manufacturing facility can be simplified. CONSTITUTION: A method for preparing lecithin with high purity is characterized to extract dried soy bean lecithin with 150-300wt.% of acetone soluble solution at 20-50deg.C four times or more while increasing steadily the temperature. Preferably, the temperature of the first extract is 30deg.C or less, and the temperature of over fourth extract is about 50deg.C. And then decompression and dry is processed at 80-90deg.C. The content of acetone insolubles after the last extracting step is 94-99.9%, and the time required for each extracting step is 20-60minutes.