A process for treating fluid streams product

The present invention relates to a method of handling product fluid streams which are obtained in the catalytic hydrogenation of liquid feeds in laboratory catalysis apparatus. The liquid inlets are preferably hydrocarbons having sulfur- and nitrogen-containing compounds as impurities. The hydrogenation serves to convert the impurities to hydrogen sulfide and ammonia, which can well be well separated from the other components of the liquid feed in this form. The product fluid streams are contacted with an inert gas, wherein the flow rate of the inert gas is higher by a multiple than the flow rate of the product fluid stream. By the inventive method, the formation of deposits in lines of the reaction chamber exit-side portion can be effectively prevented.