PATENTS

       205.            BORDENCA, C., AND LAZIER, W. A.  (Food Machinery & Chemical Corp.).  Reaction of Limonene With Carbon Monoxide and Hydrogen.  United States Patent No. 2,584,539: 3 claims (Cl. 260-598).

Original Roelen patent (United States Patent 2,327,066, abs. 2803) for the production of oxygenated C compounds does not produce according to instructions any substantial amounts of aldehydes and ketones but rather an intractable tar as the principle product.  It became obvious form experiments carried out to convert limonene, for example, to a carbonylic derivative by reaction with CO and H₂ that catalysts other than those mentioned in the original patent would be necessary.  In accordance with the present invention, it was found that 2 pure B-substituted butyraldehydes (B-4-methyl->3-cyclohexanyl-butyradehyde and B-4-methyl-cyclohexyl-butyraldehyde) can be produced by reacting limonene with CO and H₂ in the presence of Raney Co catalyst, prepared by extracting the Al from a powdered Co-Al alloy with aqueous alkali at a temperature of 130º-175º, and a pressure of 1,000-5,000 p. s. i. for 0.5-10 hr.  The products have been found useful in manufacturing perfumes.