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Return to Abstracts of Patents Return to Abstracts of Patents 1250-1499 Patent Abstracts1250. ------. [I. G. FARBENINDUSTRIE A. G.] [High Pressure Reactions.] French Patent 659,582, Aug. 28, 1928. Chem. Abs., vol. 23, 1929, p. 5253. High-pressure reactions using high temperatures, particularly those operating in the presence of H2, are carried out in double walled vessels, 1 or both walls being made of special steel such as V2A. |