HIGHLY PURIFIED ACID TYPE SOPHOROLIPID-CONTAINING MATERIAL AND PRODUCTION METHOD THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a method for producing a highly purified acid type sophorolipid-containing material substantially not containing acetic acid.;SOLUTION: The method comprises the steps of (i) and (ii-b): (i) adjusting pH of crude acid type sophorolipid (SL)-containing material to an acidic region lower than 7; and (ii-b) leaving standing still the acidified crude acid type SL-containing material obtained in the step (i) under a low temperature condition determined as in the following conditions (a) - (d) according to its pH, and then washing the generated gelled material with a cold, water-containing solvent of 15°C or lower to obtain gelatinous acid type SL-containing material. The conditions are:(a) pH4 or lower: -25°C-15°C; (b) higher than pH4 and not higher than pH5: -25°C-10°C; (c) higher than pH5 and not higher than pH6: -25°C--10°C; and (d) higher than pH6 and lower than pH7: -25°C--20°C.;COPYRIGHT: (C)2014,JPO&INPIT