Beschreibung:
<jats:p>From polychlorinated paraffins (C = 13 … 19) cation‐active products are obtained on a bench scale by conversion with ethylenediamine and subsequent quaternization with dimethyl sulphate. The cation‐active products are investigated with respect to their efficiency in the coagulating flotation of wastewaters of the petroleum industry. The content of petroleum‐containing products, the value of COD‐Cr as well as turbidity and colouration are reduced by up to 90, 67 and 86%, respectively. These results are almost equivalent to those of a commercial flocculant, which was used by comparison, and considerably exceed the results of FeSO<jats:sub>4</jats:sub>.</jats:p>