1810. ---------------. [KOCH, H.] [Newer Investigations of Lubricating Oils Prepared From the Synthesis Product (Kogasin) of the Fischer-Tropsch Process.] Brennstoff-Chem., vol. 19, 1938, pp. 337-343; Proc. Pure Applied Chem., Rome, 10th Intern. Congr., 1938; British Chem. Abs., 1938, B, p. 1385; Chem. Abs., vol. 32, 1938, p. 9466.

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Literature Abstracts

1810. ---------------. [KOCH, H.] [Newer Investigations of Lubricating Oils Prepared From the Synthesis Product (Kogasin) of the Fischer-Tropsch Process.] Brennstoff-Chem., vol. 19, 1938, pp. 337-343; Proc. Pure Applied Chem., Rome, 10^th Intern. Congr., 1938; British Chem. Abs., 1938, B, p. 1385; Chem. Abs., vol. 32, 1938, p. 9466.

Viscometric properties, chemical composition, aging characteristics, influence of hydrogenation, and behavior in use of monoolefins prepared from Kogasin are described and discussed with comparative data and references. More recent work shows the dependence of the viscosity-temperature behavior not only on the boiling range of the Kogasin fractions used in preparation of the oils, but on the olefin content of the fractions. Studies in determination of the I number of Kogasin lubricants by various methods show the importance of controlling time, concentration, and excess reagent in the tests. Ring analyses show approximately 1 naphthene ring per mol. regardless of viscosity-temperature characteristics. Similarly, extraction with acetone indicates that the proportion of the ring is the same in fractions of all viscosities. Aging tests of oil for transformer use by the method of Weiss and Salomon showed no sludge formation in 11 days. Exhaustive hydrogenation increased oil stability to light and air progressively to low acid and saponification numbers after 6-mo. storage tests.