PATENTS

      1419.  ------.  [I. G. FARBENINDUSTRIE, A. G.]  [Process for Producing Aldehydes and Ketones.]  German Patent Appl. I 70,739, OZ 13,059, filed Oct. 25, 1941 (Cl. IV d-12 o).  FIAT Reel 166, frames 5,200-5,205: PB 68,774: TOM Reel 17, item 32, frames 866-871: TOM Reel 36. bag 3,454, item 21: Meyer Transl. PC-S-V, Oxo, vol. 1, chap. 11, 1948, p. 28.

            In a process for producing aldehydes and ketones, compounds with olefinic double bonds are caused to react with CO and H2 at increased temperature and pressure in presence of catalysts that contain as the active constituent metals of the 8th group, particularly Co, and substances that depress the hydrogenating effect of the catalyst.  Metalloids of the 5th and 6th groups, particularly S or its compounds in which the metalloid atom is not directly combined with O, may be used.  Example: 60 parts of a catalyst (Co. 34%; Th, 2.2%; MgO, 1.4%; kieselguhr. 62%). made by precipitating the metal as the carbonate in the presence of kieselguhr and reducing with H2 at 400º, are added to 800 parts of an olefin-paraffin mixture, obtained by cracking and b. 250º-260º, and 2 parts of CS2.  The mixture is stirred at 140º with an equal amount of a mixture of CO and H2 under 200 atm. pressure until no more water gas is absorbed.  Then the CO+H2 mixture is substituted by H2 and heated for 15 min. at 180º and 200 atm. pressure.  Thus a mixture of aldehydes and paraffins is obtained having a carbonyl number of 110 and a hydrozyl number of 0.0 that is free from Co carbonyl.  The conversion is about 90%.