Process for detoxifying high aqueous content hazardous waste streams

摘要

A process for detoxifying a high aqueous content hazardous waste stream having a water content greater than about 70 weight percent and comprising halogenated hydrocarbonaceous compounds which comprises the steps of: (a) contacting the hazardous waste stream containing halogenated hydrocarbonaceous compounds in the presence of hydrogen and in the absence of a basic compound with a hydrogenation catalyst comprising a refractory support and at least one metal having hydrogenation activity and which metal is selected from the metals of Groups VI-B and VIII of the Periodic Table in a hydrotreating reaction zone operated at conditions selected to hydrogenate at least a portion of the halogenated hydrocarbonaceous compounds which conditions include a pressure from about 100 psig (2068 kPa gauge) to about 5000 psig (34475 kPa gauge), a maximum catalyst temperature from about 250 DEG F. (121 DEG C.) to about 850 DEG F. (454 DEG C.) and a hydrogen circulation rate from about 200 SCFB (35.6 std. m3/m3) to about 10,000 SCFB (1778 std. m3/m3); and (b) separating the effluent from the hydrotreating reaction zone in a gravitational separation zone to provide a hydrogenated hydrocarbonaceous stream and a detoxified aqueous stream.