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 8^th group, particularly Co, and substances that depress the hydrogenating effect of the catalyst.  Metalloids of the 5^th and 6^th 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%.