430. CONRAD, R., AND BADISCHE ANILIN, UD SODA-FABRIK. (I. G. Farbenindustrie A. G. “In Auflösung”). [Olefins.] German Patent 808,836, July 19, 1951 (Cl. 12 6-1903). Chem. Abs., vol. 47, 1953, p. 3327.

Patent Abstracts

430. CONRAD, R., AND BADISCHE ANILIN, UD SODA-FABRIK. (I. G. Farbenindustrie A. G. “In Auflösung”). [Olefins.] German Patent 808,836, July 19, 1951 (Cl. 12 6-1903). Chem. Abs., vol. 47, 1953, p. 3327.

Olefins or alcohols with aliphatic ethers at 200º-500º in the presence of dehydrating catalysts, such as difficulty reducible metal oxides, for example, Al, Mg, Cr, Th, W, or Ti, and also phosphates, silicates, china clay, graphite, or kieselguhr, give olefins of a higher molecular weight than that of the initial olefins. Suitable initial materials are C₂H₂, MeCH:CH₂, or butylenes or the alcohols with the same number of C atoms or olefinparaffin mixtures resulting from the catalytic dehydrogenation of gaseous hydrocarbons, or olefin-rich gaseous reaction products from the CO hydrogenation, and on the other hand Et₂O, MeOEt. (iso-Pr)₂O, or CH₂:CHOMe. Thus leading Me₂O 19 and n butylenes (I) 132 1. per hr. through a quartz tube heated at 350º-360º and packed with activated alumina and cooling the reaction vapors with solid CO₂ gives a condensate from which unreacted Me₂O and (I) are removed by distillation. The liquid reaction product 1,700 gm. (within 70 hr.) consists of pentene 25 (containing diolefins 16), hexenes 12.7 (containing diolefins 16). Heptenes 8 (containing diolefins 37). Octanes 8 (containing diolefins 71), and higher molecular hydrocarbons 44%: I number 215-367, solid residue 2%; 6.4% of the Me₂O used is decomposed to CO and CH₄.