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Return to Abstracts of Patents Return to Abstracts of Patents 1250-1499 Patent Abstracts1384. ------. [I. G. FARBENINDUSTRIE, A. G.] [Photochemical Reactions.] French Patent 647,730, Nov. 14, 1927. Chem. Abs., vol. 23, 1929, p. 2369. Photochemical reactions are produced in gases or vapors by resonance radiations, the maximum intensity of irradiation in the reaction chamber being obtained by arranging the apparatus so that the metallic vapor, which emits the radiations, surrounds the gases on all sides or the reaction chamber surrounds the source of the radiations. A relatively high intensity of the narrow resonance ray is obtained by the addition of indifferent gases, such as He, or the use of high –frequency vibrations. Gives examples of the production of aldehydes from mixtures of CO and H2. |