ABSTRACT
This chapter discusses a facility installed at the Rohm and Haas Philadelphia Plant to reduce the volume of propylene dichloride (PDC) discharged. By the time the pollution control system had been installed, PDC levels were regulated by the city of Philadelphia and new regulations were being considered by the EPA. Amberlite XAD-4 is one of a series of polymeric adsorbents developed by Rohm and Haas Company for the removal of organics from wastewater. This product fits in with a number of Rohm and Haas Ion Exchange products sold for waste treatment. The waste treatment products have been used extensively for solving pollution control problems worldwide. Amberlite XAD-4 is a hydrophobic styrene-divinylbenzene copolymer with especially high affinity for non-polar organics and organic compounds with aromatic rings. Activated carbon has a more hydrophilic surface and requires much more severe conditions to regenerate, including a high temperature furnace in some cases.
