986.    -------------.  [FISCHER, F., AND KOCH, H.]  [Catalytic Hydrogenation of Carbon Disulfied at Ordinary and Elevated Pressures.]  Brennstoff-Chem., vol. 19, 1938, pp. 245-249; Chem. Abs., vol. 32, 1938, p. 9437.

     Analogy to the hydrogenation of CO2 has been studied.  Experiments at atmospheric pressure over Co catalyst at 170-350 and at 184 atm. pressure at 305 with MoS3 show complete conversions of a 1:3 mixture of CS2 and H2.  In a 90% contraction with 4 l./hr. passage at 250, H2S and MeSH and Me2S in a 3:1 proportion representing 80% of the CS2 were formed.  A maximum of 20% CH4 was formed at 350 in 16 l./hr. passage of 1:5 CS2-H2 mixture.  Separation of C was not observed nor was the formation of C2H4 established, although 1% of unsaturated hydrocarbons was noted in the 300-320 tests.  Strong exothermal fractions began at 190 in the steel autoclave with the 1:3 mixture with 30% CH4 and H2S.  Slower hydrogenation at 200-225 to 42 atm. was obtained with a 2:1 mixture, the balance of the H2 being added subsequently, whereby no hydrocarbons were formed.  The main liquid products then were a mixture of organic S compounds boiling 20-150, in which (CH2S)3 was identified with thioethers and mercaptans.