PATENT

3732.  TAYLOR, A. W. C., AND ACKROYD, N.  (Imperial Chemical Industries, Ltd.  separation of Aldehydes and Olefins From Cobalt.  British Patent 655,976, Aug. 8, 1951.  Chem. Abs., vol. 46, 1952, p. 7584.

Aldehydes obtained by reaction of olefins and CO with Co as catalyst and unreacted olefin are separated from Co by flash distillation.  Thus, the reaction mixture of di-isobutylene nonaldehyde, and Co at 92° was fed at the rate of 1.51. per hr. to point ⅓ of the way down a steel column 38 X 2 in., packed with ¼ x ¼ in. stainless steel gauze rings, heated to 150°-160° at the bottom and 125°-130° at the top; after 5 hr., 7.4 1. of aldehyde and olefin containing < 10 p. p. m. Co were recovered. Similarly, propylene and mixed butyraldehydes were separated from Co and a paraffin oil solvent.