Abstract: An arsenic removal process where arsenic 3 is oxidized to arsenic 5 where the water is passed upflow through a bed of manganese dioxide (MnO2) at a sufficient flow rate such that the MnO2 bed is fluidized whereby precipitating or precipitated iron and/or manganese and/or any other suspended solids will pass through the bed. The suspended matter is then removed by passing the water through disposable or reusable filters. The oxidized arsenic is then removed by passing the water through applicable arsenic removal media.

Abstract: The present invention is an improved process for the recovery of ethylene glycol from spent glycol generated in the manufacture of polyethylene terephthalate. The spent glycol typically consists of metal oxide catalyst residues, low molecular weight terephthalate oligomers, diethylene glycol and other trace impurities. The improved process of the present invention is based on the principle that elevating the temperature of the spent glycol increases the solubility of the low molecular weight oligomers so that the low molecular weight oligomers can be dissolved in the ethylene glycol and further that the spent glycol at an elevated temperature may be passed through an ion exchange bed to remove metal oxide catalysts, color forming impurities and other trace impurities.