Process for removing ethers and/or polycyclic aromatic hydrocarbons from water containing them
AssigneeDegussa-Huels Aktiengesellschaft
InventorsGerda Grund, John Kahsnitz
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Abstract
A process for the removal of ethers and/or PAH's from water, such as contaminated groundwater, is provided that proceeds by initially separating off solid constituents and then adsorbing ethers and polycyclic aromatic hydrocarbons to an adsorber resin, then, as needed, desorbing the adsorbed compounds with steam and regenerating the adsorber resin with an acid, to provide purification of highly polluted groundwater to such a substantial extent that the groundwater can be added to flowing surface waters without problem, and, if desired, used as cooling water or, after further biological purification, as drinking water.
Claims12
A process for removing ethers, polycyclic aromatic hydrocarbons or both from water, comprising:
- a) adsorbing the ethers, polycyclic aromatic hydrocarbons or both onto an adsorber resin capable of removing the ethers, polycyclic aromatic hydrocarbons or both from water to provide a purified water containing less than 10 μg/l of ethers and less than 5 μg/l of polycyclic aromatic hydrocarbons;
- b) desorbing the ethers, polycyclic aromatic hydrocarbons or both from the adsorber resin with steam;
- and
- c) regenerating the adsorber resin with an acid;
- and
- wherein the absorber resin is a divinyl benzene/styrene copolymer having a specific surface area of about 700 to 900 m2/g;
- and wherein during the regenerating step, an oxygen containing gas is passed through the absorber resin in counter-current to the acid.
Dependencies are inferred from the claim text.