Abstract: Clarification of roselle exrtract and the different clarification effects of pectinase, bentonite, glutin and chitosan were studied. Recommendatory clarification means is: first clarifying reaction at the condition of 0.125 g/L chitosan and 0.75 g/L glutin, normal temperature and time 3 h, then treatment at rotate speed 6000 r/min by disk centrifugal separator, and then kieselguhr filtration, and finally micro-filtration by hollow fiber microfiltration device (Φ0.45μm). In this way, clarifying roselle extract of transmittance 82.7% at 660 nm and 0.03 NTU(nephelometric turbidity units)can be gotten.

Key words:  , roselle； roselle extract； clarification； glutin clarificant； chitosan clarificant；