Abstract: The PIntycarya strobilacea Sieb.et Zucc as raw material medicine with ceramic membrane separation was studied by extracting polyphenol content with ethanol reflux method.The extraction temperature was 77  ℃,the solvent concentration was 55%,the liquid ratio was 14 mL/g,the extraction time was 3 times,and the extraction rate was 3.02%.The index component transmittance rate as evaluation index.the concentration of the sample,the pore diameter and the pressure of the membrane was separately investigated.The maximum transmittance was 37.2% with the transmittance as the index.The optimum separation conditions were concentration 1 g/L,pressure 0.8 MPa,and pore diameter 300 KD.During the process of polyphenol ultrafiltration,the temperature was controlled at 24  ℃ and the pressure was 0.8 MPa，Its mass transfer coefficient K is 12.93 mm/h,the film surface equilibrium concentration Cg is 1.84 g/L;The polyphenol ultrafiltration membrane resistance Rm is 0.016 1 (h·MPa)/mm,the concentration polarization resistance is 0.005 7·Δp And the ultrafiltration membrane flux (J_v) and ultrafiltration pressure difference (P) obeyed:J_v=Δp/0.016 1+0.005 7,and UF membrane concentration (C_m) and delta P obeyed:C_m=C_bexp12.93/1(Δp/0.016 1+ 0.033Δp)The results showed that the separation of polyphenols by the ceramic membrane was high,and the membrane separation process conforms to the mass transfer kinetics equation,which provided an effective theoretical basis for the subsequent experimental work

Key words: PIntycarya strobilacea Sieb.et Zucc, total polyphenols, membrane separation, kinetic analysis