Method and device to reduce the acetaldehyde content of polyester granulate

Abstract

The invention relates to a method for producing a granulate with a low acetaldehyde content and improved processing properties from a high-viscosity polyester melt, wherein the polyester melt strand is fragmented under water at the highest possible temperature, the accompanying water is separated from the granulate with the least possible cooling of the granulate, the low-water granulate obtained in this way is passed after removal of the water directly into a dealdehydisation container and the granulate in ihe dealdehydisation container is treated with a flow of rinsing air, plus a device for carrying out this method.