Patent ID: 6720431
Filing Date: 2004-04-13
Classification: B01D,B01J,C10G,G01N

Abstract:
A method of separating polyhalogenated biphenyl compounds (PHBs), polyhalogenated dibenzofurans (PHDFs) and polyhalogenated dibenzo-p-dioxins (PHDDs) from a mixture of polyhalogenated diaromatic hydrocarbons, comprising:extracting a sample with an organic solvent to produce a first extracted sample comprising polyhalogenated diaromatic hydrocarbons; contacting said first extracted sample with an adsorption matrix comprising activated carbon and diatomaceous earth, wherein said activated carbon has been heated prior to contact with the first extracted sample, and wherein PHB, PHDD and PHDF compounds adsorb onto the matrix; eluting the PHB compounds from the matrix to produce a PHB fraction; and eluting the PHDD and PHDF compounds from the matrix to produce a PHDD/PHDF fraction.