Patent ID: 6267310
Filing Date: 2001-07-31
Classification: A61P,B07B

Abstract:
A process for separating particles of a cohesive form of a polydisperse compound or composition comprising nevirapine, nevirapine hemihydrate, mexiletine or mexiletine hydrochloride according to size, said process comprising milling and sizing the composition in an apparatus comprising:(a) a main stationary frame structure;(b) a drive means mounted inside a tilting base and a stationary motor on the frame; and(c) a generally vertically cylindrical screening unit, the bottom of which is supported on the said main frame and being adapted for independent horizontal rotation and vertical reciprocation by said drive means, said screening unit comprising upper and lower sub-frame members, at least one removable screening tray, one tray spacer member for each screening tray in the unit, and tray clamping means for the unit.