公开(公告)号：US20200255591A1

公开(公告)日：2020-08-13

申请号：US16634913

申请日：2018-09-04

Applicant: SABIC GLOBAL TECHNOLOGIES B.V.

Inventor： Rayees Ahamed Imam ,  Tukaram Gunale ,  Samir Anapat ,  Fernan Mateos Salvador

IPC: C08G64/30

Abstract: In an embodiment, a method of manufacture of a melt polycarbonate comprises melt polymerizing a bisphenol and diphenyl carbonate to form phenol and the melt polycarbonate in a polymerization unit; removing an overhead stream comprising the phenol in a gas phase from the polymerization unit; combining the overhead stream with a gas stream comprising a solvent in a gas phase to form a combined gas stream; wherein the combined gas stream has a freezing point at less than 3 mbar absolute that is less than the triple point of phenol; and condensing the combined gas stream in a condenser to form a condensed stream comprising the phenol and the solvent in a liquid phase.