METHOD OF TREATING PROCESS WASTE WATERS CONTAINING DIMETHYLACETAMIDE AND ISOBUTYL ALCOHOL Russian patent published in 2005 - IPC

FIELD: waste water treatment.

SUBSTANCE: initial waste water is mixed with chloroform to extract dimethylacetamide and isobutyl alcohol and, after settling-assisted separation from chloroform, resulting mixture is passed through activated carbon. Thus purified water is then reused in process. Activated carbon is regenerated by chloroform. Chloroform loaded with desorbed substance and chloroform extract are combined and distilled to give dimethylacetamide, isobutyl alcohol, and chloroform. Distilled-off chloroform is divided into two streams, the first one being returned to regenerate activated carbon and the other is mixed with initial waste water.

EFFECT: reduced expenses due to reduced compound of costly adsorbent without loss in waste water treatment efficiency and enabled low-waste technology.

2 cl, 1 dwg