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.