SYSTEM AND AUTOMATIC METHOD FOR EXTRACTION OF GASEOUS ATMOSPHERIC CONTAMINANTS WITH TOXIC PROPERTIES, WHICH ARE RETAINED IN POLYURETHANE FOAM (PUF) FILTERS

摘要

The present invention provides a system and method for automatic extraction of gaseous atmospheric contaminants (for example HAPs and PCBs) with toxic properties, which are retained in polyurethane foam filters (PUF) that consists of: An automatic extraction device, which allows extracting chemicals compounds of interest using a sequence of organic solvents where the PUF must be immersed in, by means of a process of extraction based on compression and decompression cycles of the PUF; and A drying device which permits to dry the cleaned PUF, from the previous process, by means of sweeping the solvent with hot gaseous ultra pure N2, eliminating the solvent until achieving the dryness of the PUF.