SYSTEMS AND PROCESSES FOR MAKING A POLY(VINYL ACETAL) RESIN WITH ENHANCED PARTICLE TRANSPORT AND RECOVERY

摘要

Processes and systems for making a poly(vinyl acetal) resin particles are provided. The processes and systems described herein utilize one or more methods, including, for example, slurry dilution and/or filtration of various process streams, to optimize the transport and recovery of the poly(vinyl acetal) resin particles. Systems and processes described herein facilitate increased production of the final resin product by minimizing product loss and maximizing on-line operation time and production flexibility.

主权项

1. A process for producing a poly(vinyl acetal) resin, said process comprising:
(a) reacting a poly(vinyl alcohol) and at least one aldehyde in a reactor to produce a reaction slurry comprising a plurality of poly(vinyl acetal) resin particles; (b) withdrawing a portion of said reaction slurry from said reactor; (c) combining at least a portion of said reaction slurry withdrawn from said reactor with a stream of dilution fluid at a combination point to thereby provide a diluted reaction slurry; (d) introducing said diluted reaction slurry into a wash vessel; and (e) contacting at least a portion of said poly(vinyl acetal) resin particles with a wash liquid in said wash vessel to thereby provide a plurality of washed poly(vinyl acetal) resin particles and a spent wash liquid.