Method for preparing and detoxifying

摘要

The present invention concerns a method for processing and detoxification of a material, especially a thermoplastic material, and for removal of contaminants or impurities from this material, wherein the material is heated under vacuum in at least one receiving tank (1), mixed and possibly comminuted, and wherein a rinsing medium is introduced into the receiving tank (1) beneath the material level, conducted through at least a partial region of the material, and the rinsing medium enriched or saturated with contaminants is brought out from the receiving tank (1) once more.

主权项

1. A method for processing and detoxification of a plastic or thermoplastic material, and for removal of contaminants or impurities from the material, comprising:
heating the material under vacuum in at least one receiving tank, mixing the material, and optionally comminuting the material; introducing a gaseous rinsing medium into the receiving tank beneath a level of the material, wherein the gaseous rinsing medium enters the receiving tank or strikes the material with a velocity of at least 1 m/min, conducting the gaseous rinsing medium through at least a partial region of the material, and bringing out the gaseous rinsing medium, enriched or saturated with contaminants, from the receiving tank; wherein a quantity of the gaseous rinsing medium introduced into the receiving tank is less than 5 Nm3 (normal cubic meters Vn per DIN 1343) per hour per kilogram of material or material throughput per hour; and keeping the vacuum in the receiving tank constantly below 100 mbar while introducing the gaseous rinsing medium into the receiving tank.