1825. ---------------. [KOCH, H., AND HILBERATH, F.] [Hydrocarbons boiling Below 100° in Synthetic Gasoline From Carbon Monoxide and Hydrogen (Kogasin).] Brennstoff-Chem., vol. 22, 1941, pp. 135-139, 145-152; Chem. Abs., vol. 36, 1942, p. 5331.

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Literature Abstracts

Olefins were separated from paraffins by means of the Hg(OAc)₂ method. Tests showed that this method also can be used for ditertiary olefins; for example, C₂Me₄. The 2 hydrocarbon groups were further split up by fractional distillation. For this purpose a packed column (23 in. high, heated by oil circulation) and several glass spiral columns (80, 160, and 320 cm. high) were made. The applicability of the semimicrofractionating column with a rotating metal band of Lesesne and Lochte type (Chem. Abs., vol. 32, 1938, p. 7310) was extended by various additions. The paraffin mixture was separated into its individual components by 58 fractional distillations, most of which occupied several days. Besides the predominant n-paraffins, n-C₅H₁₂, -C₆H₁₄, and –C₇H₁₆, the following pure isoparaffins were isolated: MePr^B, β- and γ-methyl-pentane and –hexane, and the presence of CHEt₂ was proved. Multibranched paraffins were present only in traces, if at all. The olefin mixture was separated by 134 fractional distillations into the following: Δa- and Δβ-pentene, -hexene, and –heptene, as well as CHPrβ. CH₂, ξ-methyl-Δ^a, hexene, a mixture of γ- and ε-methyl- Δ^a-hexene. The olefins were identified by their physical properties and partly by hydrogenation reactions. The olefins consisted mainly of unbranched a- and β-olefins. Besides these, small quantities of a-olefins singly methylated outside the double linking were found. The presence of other types of olefins can be assumed but quantitatively they are negligible. Appreciable amounts of tertiary but no quaternary C were found in the products from Co catalysts.