a process for making a high molecular weight polycarbonate resin is disclosed . the process entails obtaining at least one member selected from the group low molecular weight residue of aromatic polycarbonate production , waste of polycarbonate production , remainders of polycarbonate production and polycarbonate recyclate melting the said member in a suitable vessel to obtain a melt and feeding the melt into a reactor optionally along with at least one bisphenol or oligocarbonate having terminal oh groups and further optionally with a transesterification catalyst , and subjecting the melt to transesterification reaction at a temperature of 250 to 350 ° c ., at a pressure below 5 mbar and residence time of 0 . 02 - 4 hours .