|
|
Return to Abstracts of Patents Return to Abstracts of Patents 1250-1499 Patent Abstracts1385. ------. [I. G. FARBENINDUSTRIE, A. G.] [Photochemical Reactions.] French Patent 649,295, Nov. 14, 1927. Chem. Abs., vol. 23, 1929, p. 3408. Yields in photochemical gaseous reactions are increased by passing the gas or gaseous mixture charged with metallic vapor in permanent circulation near the source of resonance radiations so that the products are formed in relatively feeble concentration, preferably <2%, and are continually removed from circulation by solvents. Gives examples of the preparation of CH2O and glyoxal from CO and H2, H2O from O2 and H2, aldehydes from water gas, and aldehydes and H2O2 from CH4 and air. See also United States Patent 1,788,170 (abs. 2674) and French Patent 647,730 (abs. 1384). |