Process for detoxifying high aqueous content hazardous waste str

Liquid purification or separation – Processes – Making an insoluble substance or accreting suspended...

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210766, 210774, 210804, 210808, 210908, 210909, C02F 900

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049099477

ABSTRACT:
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.degree. F. (121.degree. C.) to about 850.degree. F. (454.degree. C.) and a hydrogen circulation rate from about 200 SCFB (35.6 std. m.sup.3 /m.sup.3) to about 10,000 SCFB (1778 std. m.sup.3 /m.sup.3); 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.

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