Separation and Purification Systems

The carbon black (soot) produced in the partial combustion and electrical discharge processes is of rather small particle si2e and contains substantial amounts of higher (mostly aromatic) hydrocarbons which may render it hydrophobic, sticky, and difficult to remove by filtration. Electrostatic units, combined with water scmbbers, moving coke beds, and bag filters, are used for the removal of soot. The recovery is illustrated by the BASF separation and purification system (23). The bulk of the carbon in the reactor effluent is removed by a water scmbber (quencher). Residual carbon clean-up is by electrostatic filtering in the case of methane feedstock, and by coke particles if the feed is naphtha. Carbon in the quench water is concentrated by flotation, then burned. 

Not less interesting direction is application of water-soluble polyions as carriers in the BAHLM separation and purification systems for drug production. The author did not find any works in this field but, according to his opinion, investigation of available polyelectrolytes in selective separation of drug components from the biochemical mixtures, development of new selective stable WSP for these purposes may have enormous effect in pharmaceutical industry. 

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