Method for the adsorptive extraction of hydrocarbons from aqueous solutions of hydrocyanic acid

摘要

According to this method for the adsorptive extraction of hydrocarbons from aqueous solutions of hydrocyanic acid, the initial solutions containing 1 to 50 wt. % hydrocyanic acid and 2 to 1000 wt. ppm aliphatic and/or aromatic hydrocarbons, the latter having 6 to 30 C atoms each, are passed, preferably continuously, at temperatures between 2 and 50° C. and at a maximum flow velocity of 500 m/h through a fixed-bed, activated-carbon adsorber whose interior surface is preferably 100 m. sup.2 /kg. In this way it is possible to quantitatively free aqueous solutions of hydrocyanic acid from hydrocarbons, in particular from benzene, with means of relatively low technical complexity.