PATENTS

       33.            ARNOLD, J. C. (Standard Oil Development Co.).  Catalytic Apparatus.  British Patent 589,342, Mar. 16, 1944.  Chem. Abs., vol. 42. 1948. p. 356.

Aryl amines of benzene series are obtained by introducing a mixture of aryl nitro hydrocarbons, which may include polynitro compounds, H₂ and large quantities of liquid diluent into a reaction zone at a number of points in the presence of a hydrogenation catalyst at elevated temperature.  The products are separated from the diluent, and the diluent is recycled as cooling medium.  The diluent is present as 20-90% vol. Of the total liquid feed mixture.  Liquid products from hydrogenation of disobutylene or by alkylation of olefins with isoparaffins or by hydrogenation of CO are mentioned as diluents.