Process for separating hydrocarbons from waste water
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United States of America Patent
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Dec 3, 1991
Grant Date -
N/A
app pub date -
Apr 5, 1989
filing date -
Oct 18, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for separating hydrocarbons from waste water, in particular aromatic hydrocarbons, by means of an absorbing filtering layer. The hydrocarbons dissolved and non-dissolved in the waste water are separated in a single stage. The waste water is supplied to a metallic slotted multiple tube filter, and a hydrocarbon-containing material, preferably coking duff, is used as an adsorbing filtering layer. Its grain size distribution in the particle size range between 0.05-0.2 mm has a mass proportion of at least 25% by weight, with a total surface area of at least 1500 cm.sup.2 /g. The filtering material can be made to float on the filtering elements or added to the waste water.
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