Patent ID: 6576132
Filing Date: 2003-06-10
Classification: B01D,C02F,C10G

Abstract:
A process for cleaning condensed furnace dilution steam portion of a quench water stream comprising greater than about 100 weight parts per million dissolved polymer precursor organic compounds, said process comprising the consecutive steps of:(a) contacting said portion of quench water stream with an extracting solvent comprising fully hydrogenated hydrocarbons in a multi-stage liquidâ€”liquid extractor to produce a quench water raffinate comprising less than about 20 weight parts per million of said dissolved polymer precursor organic compounds and rich in said fully hydrogenated hydrocarbons and spent solvent rich in said dissolved polymer precursor organic compounds; (b) withdrawing said quench water raffinate from one end of the extractor; and (c) steam stripping said quench water raffinate in a steam stripping unit to remove substantially all of said fully hydrogenated hydrocarbons from said quench water raffinate to provide a pretreated quench water stream.