Nylon salt preparation method and nylon salt polymerization method

摘要

The present invention is a method for preparing a particulate nylon salt material, comprising an aqueous mixture comprising at least 65 wt% salt component and at most 35 wt% aqueous medium (weight percent (wt%) is based on the total weight of said aqueous mixture) Is flushed from the compression vessel through a flash valve to a flash chamber, thereby evaporating a sufficient amount of aqueous medium to leave a residual water content of at most 7.5 wt% It relates to a method for producing a nylon salt material. The present invention also relates to a method for preparing a nylon polymer comprising direct solid phase polymerization of particulate salt material prepared by flash granulation. [Selection figure] None