Free Books and Brochures

solute (A). The main product, benzene, is represented by solute (B), and the high boiling aromatics are represented by solute (C) (toluene and xylenes). An analysis of the products that were obtained are shown in figure 27. The material stripped form the top (section (1)) is seen to contain the alkanes, alkenes and naphthenes and very little benzene. The product stripped from the center section appears to be virtually pure benzene. The product from section (3) contained toluene, the xylenes and thiophen which elutes close to benzene. The thiophen, however, was only eliminated at the expense of some loss of benzene to the lower stripping section. Although the system worked well, Scott and Maggs found it experimentally difficult to set up and maintain production under constant operating conditions. The problems arose largely from the need to adjust the pressures that must prevent cross-flow. Without doubt, today, the system would be computer controlled. The simple system as described,