Return to Abstracts of Patents Return to Abstracts of Patents 500-749 Patent Abstracts528. ------. [DREYFUS, H.] Formaldehyde: Methanol. British Patent 157,047, Feb. 10, 1921: appl. filed Aug. 25, 1917. Chem. Zentralb., 1921, II, p. 1061: Chem. Abs., vol. 15,1921, p. 1725 Pt black or Ni is used as catalyst, and it can be deposited on pumice. Hydrogenation takes place in Fe cylinders filled with the catalyst. |