????? ???? ???? ?? ???? ?? ??? ???? ?? ??? ????. ????? ???? ??? ?????? ??? ???? ?????? ??? ????, ???? ????? ?????? ?? ??? ???? ???????, ?? ???? ????? ????? ?????? ????? ???? ????? ??.

???? ????? ?????, ???? ?????? ???? ????, ?????, ???, ????, ?????? ?? ???? ???? ??? ??? ?? ??? ????? ????? ??? ?????.

???? ???? ????? ?????, ????? ?????????? ???? ?? ??? ??? ??? rancidity ?????? ???? ??? ??? ???? ????, ??? ?? ???? ????? ?? ?? ???? ?????? ???? ????, ????? ?? ?????? ?? ?? ????? ??? ?????, ??? ?? ??? ???? ???? ?????? ??? ???? ????.

1.????? ??????????

????? ??-???-???? ????? ???? ?? ?????? ????? ????? ???, ?? ???? ???? ???? ????. ????? ? ???? ??? ?? ??? ?????? ???????? ??? ???? ??? ?? ?????

???? ? ?? ?????? ? ????? ?????????? ????? ????? ? ????? ?????? ? ?????? ? ??? ?? ??? ??? ??? ???? ???? ??? ??? ? ??? ???? ??? ????? ? ????? ? ???? ??? ??? ???? ? ???? ??? ???? ???? ? ?? ???? ???? ? ?? ???? ???? ? ???????? ??? ??? ?? ????? ??? ?????? ???? ????? ?????? ? ???? ????? ?? ???-???? ???? ????? ??? ? ????? ???? ?????? ?????? ??? 0.05% ~ 0.2% ??.

2.Synthesize ??????????

?????? ????? ??-???-???? ? phenol ???? ??? ? ?? ????? ???? ?? ?? ????????? ???? ??? ??? ??? ???-????? ??? ???? ?????

????? ??? ???? ??? ?? ????? butyl hydroxyanisole (BHA)? dibutylhydroxytoluene (BHT)? tert-butylhydroquinone (TBHQ)? propyl gallate (PG)? ??? ??? ?????? ???? ????? ?????? ??? ??? ???? ?????? ?????

3. ???????

phenolic ?????????? ????? ??, ????? ???? ??? ???? ???? ?? ???? ???, antioxidant ??? ???? ????, ?????? ???? ???? ??? ???? ??? ??? ?? ??? ??? ??? ???? chelate ????, ????? ???? ???? passivated ????, ?? ?????? ??? ??? oxidation ?????? ?????. ???? ??? ???? ??? ?? ????? ????????? ???? ???? ???? ???? ??? ??? ??? ?????? ?1/4 ??? 1/2 ?????????? ???

????? ???? ????? ?? ??????? ???? ??? ??? ?? ????? ??-???-???? ???? ???? ???? ?? ??? ????. ????? ?????, ????? ???? ?????? ???? ???? ??? ?? ??? ????, ?? ??? ???? ???? ?????.