Patent ID: 6361586
Filing Date: 2002-03-26
Classification: B01D,B01J

Abstract:
A process for cooling, demonomerizing and dedusting gas containing thermoplastic polymer dust, monomers and water from a thermoplastic polymer drier, comprising the steps of:(a) directing an exhaust stream from a thermoplastic polymer drier, which exhaust stream contains polymer dust, monomers and water into a column which houses a packing; (b) within the column, washing the exhaust stream with a solvent selected from the group consisting of water, alcohols, amines, organic and inorganic acids, esters, ketones, ethers, paraffins and mixtures thereof, to achieve substantial cooling, dedusting and demonomerization of the exhaust stream in a single washing step; and (c) exiting the substantially cooled, dedusted and demonomerized exhaust stream from the column.