| 摘要 |
PCT No. PCT/EP87/00600 Sec. 371 Date Apr. 5, 1989 Sec. 102(e) Date Apr. 5, 1989 PCT Filed Oct. 14, 1987 PCT Pub. No. WO88/02655 PCT Pub. Date Apr. 21, 1988.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 cm2/g. The filtering material can be made to float on the filtering elements or added to the waste water. |
