PATENTS

3127.----- [RUHRCHEMIE, A. G.]  [Process for Producing Hydrocarbon-Nitrocompounds.]  German Patent Appl. R 114,103, R 634, filed Sept. 18, 1942.  TOM reel 36, bag 3,454, item 36, 6 pp.

Hydrocarbon-nitrocompounds are produced from HNO₃ and olefin hydrocarbons, such as those prepared through the hydrogenation of CO, by reacting concentrated HNO₃ (1.48 sp. gr.) with the olefinic hydrocarbons at temperatures 20°-250° for periods of 5 min. or less and at any pressure.  A small amount of dehydrating agent such as H₂SO₄, P₂O₃, or Na₂SO₃ may be added.  The resulting nitrocompounds, after separation of the HNO₃ and the paraffinic fractions, are fractionated under reduced pressure and then separated from the unreacted paraffin layer by direct vacuum distillation or by extraction with selective solvents (MeOH) and subsequent vacuum distillation.  Theoretical yields of 85%-90% may be obtained.