817. GOETHEL, H., SCHALLER, P., AND TRAMM, H. Manufacture of Lubricating Oils. United States Patent 2,199,200, Apr. 30. 1940: appl. Filed Oct. 13, 1937. Serial No. 168,794, in Germany Oct. 24, 1936, 5 claims (Cl. 196-78). Chem. Abs., vol. 34, 1940, p

Patent Abstracts

817. GOETHEL, H., SCHALLER, P., AND TRAMM, H. Manufacture of Lubricating Oils. United States Patent 2,199,200, Apr. 30. 1940: appl. Filed Oct. 13, 1937. Serial No. 168,794, in Germany Oct. 24, 1936, 5 claims (Cl. 196-78). Chem. Abs., vol. 34, 1940, p. 6442.

Lubricating oil is made from a cracked benzine rich in olefins. Synthetic gasolines (Fischer-Tropsch process) are used. Their olefin content may vary widely, but their successively higher boiling fractions must follow a specified density curve closely if a satisfactory lubricant is to be produced. The synthetic gasoline is cracked under conditions that yield such a density curve and then condensed in presence of AlCl₃ for 12 hr. at about 160° C.