Direct extraction lecithin process from wet rapeseed lecithin gums

LIN Guang-zhe,LI Shao-zhang,LIU Jin-yin,CHEN Yuan-hua, HUANG Shao-wen,CHEN De-yuan,WANG Sai-yu (Animal and Veterinary Science Institute,Hubei Academy of Agricultural Science, Wuhan 430209,China)

rapeseed lecithin gums;lecithin;acetone;hydrochloric acid;extraction

This work was performed to evaluate the effects of ether-acetone mixed solvents (EAMS) and hydrochloric acid(HCI) treatment on lecithin extraction processing from the wet rapeseed lecithin gums (WRLG) directly. The basis of 1 mol.L -1 HCl(0 1 ml.g -1 ) treatment,when EAMS was used for extraction,oil extraction rate was obviously increased according to the ratio of acetone in EAMS,total residue also obviously decreased. The highest lecithin extraction ratio(24 9%) was found in the EAMS containing 20% of acetone treatment. The basis of EAMS (E:A=80∶20) treatment,HCl quantities were changed,oil extraction ratio were decreased in accordance with increasing HCl in quantity, but total residue was increased. However,the highest lecithin extraction ratio (27 9%) was appeared in 0 05 ml.g -1 WRLG treatment. Extraction ratio of ethanol-soluble substrate tend to be high along with increasing of the hydrochloric acid quantities,impurities in lecithin were obviously decreased according to increasing of acetone and HCl quantity (12 6%vs. 5 6%,4 5%vs. 2 1%, P <0 05). The extract clear rate following index curve model y=a+b(1-e -ct ) through time changes. The result suggested,using EAMS accompany with HCl treatment method enable to rapidly extraction lecithin from WRLG,without concentrate process.