271. BUCHE, W., EILBRACHT, H., AND SCHUSTER, C. (Badische Anilin-und Soda-Fabrik). [Oxygen-Containing Organic Compounds.] German Patent 803,352, Apr. 2, 1951 (Cl. 12 6-7.02). Chem. Abs., vol. 45, 1951, p. 8030.

Patent Abstracts

271. BUCHE, W., EILBRACHT, H., AND SCHUSTER, C. (Badische Anilin-und Soda-Fabrik). [Oxygen-Containing Organic Compounds.] German Patent 803,352, Apr. 2, 1951 (Cl. 12 6-7.02). Chem. Abs., vol. 45, 1951, p. 8030.

The known method of preparing O-containing compounds, such as aldehydes or ketones, by treating compounds containing olefinic double bonds with CO and H₂ at elevated temperatures and pressures in the presence of catalysts in the liquid phase is improved by using a recycled CO-H₂ mixture; the content of gaseous olefinic compounds to be treated with this mixture corresponds to the saturation pressure of the olefins under the particular reaction conditions. To regulate the olefin content of the recycled gas mixture, the gaseous reaction mixture may be introduced into a separator heated above the condensation point of the olefins to remove the O-containing products formed, the olefins remaining unchanged. Alternatively the gaseous reaction mixture may be introduced into several separators in series that have different cooling temperatures to remove first the O-containing products and thereupon the unreacted olefins. The necessary amount of olefins is added to the recycled gas mixture before it enters the reaction zone. An olefin-paraffin mixture d. 0.752. b. 100°-150°, olefin content 67%, containing Co napththenate (0.75 gm. Co per 1.) is introduced, 200 1. per hr., into a high-pressure tube of 500 1 packed with pumice, 10-12 mm., together with a recycled CO-H₂mixture (1:1) under 200 atm. Pressure. A recycled gas feed of 20 m³ per hr. is enough to keep a temperature of 140°-160°. The reaction mixture is passed through a separator and cooled to 20° below the reaction temperature to separate the addition products formed: the unreacted olefin-paraffin portions are separated in a 2d appropriately cooled separator. The exit gas mixture after passing the circulation pumps is saturated with the necessary amount of olefin-paraffin in a saturator kept at the reaction temperature: 95% of the liquid olefin-paraffin mixture is thus treated, 80% being converted to aldehydes and the residual amount to higher boiling condensation products.