Patent ID: 6297348
Filing Date: 2001-10-02
Classification: B01J,C07C,C08G

Abstract:
A process for closely linking a process for producing 2,6-naphthalene dicarboxylic acid(2,6-NDA) with a process for producing polyethylene naphthalate which eliminates need for drying 2,6-NDA, handling solid 2,6-NDA, and optimizing particle size of 2,6-NDA which comprises:Pumping an aqueous slurry of polymer grade 2,6-NDA directly into a process for making PEN, either by directly pumping a stream from a 2,6 NDA process into a PEN process, or by adding water to polymer grade 2-6-NDA prior to pumping the resulting slurry to the PEN process,b) Removing the slurry water during the first esterification reaction at the same time the water of reaction is removed.