Patent ID: 8759475

Claim:
A process for the continuous production of a polyamide from a monomer or two different monomers, comprising the following stages: Stage 1: polycondensing said monomer or monomers in a reactor having an outlet by feeding a liquid stream comprising the monomer or monomers into said reactor, wherein said reactor is at a pressure P1 greater than atmospheric pressure and polycondensation of said monomer or monomers occurs as the liquid stream moves through the reactor to form a stream of material at the outlet, wherein the stream of material comprises a vapor phase and a liquid phase, wherein said vapor phase comprises steam, and wherein said liquid phase comprises a polycondensation product of said monomer or monomers, and wherein moving said liquid stream through said reactor occurs at a speed resulting in a residence time of the liquid phase in the reactor of greater than 5 minutes; Stage 2: feeding said stream of material from the outlet of the reactor into a chamber, evacuating a portion of the vapor phase therefrom, recovering at least the liquid phase comprising the polycondensation product of said monomer or monomers, and promoting flow of the liquid phase into a pressure-reducing device of Stage 3, said chamber having a pressure P2 regulated at a set value such that it is greater than atmospheric pressure and the residence time of said liquid phase in the chamber is less than 1 minute; and Stage 3: reducing the pressure of at least the liquid phase comprising a stream of polycondensation product recovered from the chamber during Stage 2.