Objective: Taking decarburization fluid of Reduning injection as research object

to compare applicability of three kinds of membrane modules for membrane filtration of Reduning injection. Method: Hollow fibre

plate and roll type of membrane module was selected for ultrafiltration

taking membrane flux

transfer rates of index ingredients (gardenoside and chlorogenic acid) before and after ultrafiltration

fingerprint similarity

solid content decrement

protein

color comparison

oxalic acid salt and resin as indexes

membrane filtration effect of 3 kinds of membrane modules on Reduning injection was compared. Result: Three kinds of membrane modules existed differences on applicability of the same liquid system

membrane flux of plate type of membrane module was maximum

hollow fiber membrane module was minimum.Transmittances of gardenoside with hollow fiber

plate

roll type of membrane module were 87.53%

91.76% and 89.41%

transmittances of chlorogenic acid were 86.46%

91.23% and 89.47%

fingerprint similarity were 0.992

0.995 and 0.999

reduction rates of solid content were 21.35%

18.64% and 17.53%

liquid color from 8 into 3

4 and 5

respectively. Conclusion: In reduction rates of solid content and degree of clarity improvement

hollow fiber and plate type of membranes have advantages by camparing with roll type of membrane.Three types of membrane modules are suitable for ultrafiltration of decarburization fluid of Reduning injection

which best plate type of membrane.