A process for separating xylene from a feedstock in which the feedstock is separated into a xylene stream, a benzene rich stream and a light ends stream. The surface modification method enables mass production, at low cost, of new biomaterials having the advantages of both a coating substance and a body to be coated, by applying a bioactive material to various bodies to be coated through a cold spray method. The functionality and, performance of the user agent preferably takes place primarily within the telecommunications hosting server, though user client computers can provide some and possibly all of the user agent functionality, depending upon the particular implementation chosen.