Abstract: Abietic acid of 90.91% purity was obtained by amine salt method, using self-prepared amine A as raw material and 95% ethyl alcohol as recrystallization solvent. The method is economic and environmentally friendly because of the low price of amine A and small consumption of recrystallization solvent. Sample was characterized by ¹H NMR, UV, IR and GC-MS methods.Purifications of abietic acid with isopropylamine, cyclohexylamine, octadecyl primaryamine, di-n-butylamine, triethylamine, and amine A were studied. The effects of carbon numbers of amines and primary, secondary, tertiary amines on purifying process were analyzed. The abietic acid with purity of 90% could be stored for 2 months at 5 kPa and -15℃.

Key words: abietic aid, rosin acid, purify, amine