TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The feed stream in step (i) has temperature of -20 to 150 (preferably -10 to 70) degrees C, and a pressure of 10-150 (preferably 80-120) bara. The slurry stream as obtained in step (ii) has temperature of -40 to -100 (preferably -50 to -80) degrees C, and a pressure of 5-200 (preferably 55-75) bara. The cooling in step (ii) has been established by units of isenthalpic expansion, preferably isenthalpic expansion over an orifice or a valve, especially a Joule-Thomson valve, or by units of nearly isentropic expansion, preferably by units of an expander, especially a turbo expander or a laval nozzle. The process (P1), in which at least part of the slurry of the solid contaminant and liquid phase contaminant as removed in step (v) is passed to a heat exchanger where the solid contaminant present in the slurry stream is melted and at least part of the liquid phase contaminant so obtained is recycled to a lower part of the device. The feed stream is a hydrocarbonaceous stream or a product stream as obtained from a partical or complete oxidation process. The process uses at least two inlet units, preferably 2-8 inlet units, preferably where at least two inlet units are located at the same horizontal level at circumferential spaced points. The process uses four inlet units which are located at the same horizontal level at circumferential spaced points, preferably where the inlet angle is 0.5-45 degrees, more preferably where the inlet angles are all orientated in the same direction. Preferred Components: The solid contaminant comprises carbon dioxide and the liquid phase contaminant comprises hydrogen sulfide. Preferred Device: The device further comprises a heat exchanger arranged outside the device, an eductor arranged inside or outside the device or partly inside and outside the device at a level below the inlet units, where either the outlet unit for removing the slurry from the lower part of the device communicates with the eductor and the eductor communicates in turn with the heat exchanger or the eductor communicates with the outlet unit for removing the slurry from the lower part of the device and the outlet units communicate in turn with the heat exchanger, and the heat exchanger communicates with units for recycling at least part of the liquid phase contaminant to a lower part of the device or the device (D1), where the expansion units comprises an orifice or a valve, especially a Joule-Thomson valve, or an expander, preferably a turbo expander or a laval nozzle. EXAMPLE - No suitable example is given.