S. V. Lebedev, Zh. Obshch. Khim. 3, 698 (1933).
Formation of butadiene from ethanol by catalytic pyrolysis. The catalysts used are mixtures of sililcates and aluminum and zinc oxides:

S. V. Lebedev, FR 665917 (1928); GB 331482 (1929); RU 24393 (1931); C. Ellis, The Chemistry of Petroleum Derivatives II (New York, 1937) p 173; G. Egloff, G. Hulla, Chem. Rev. 36, 67 (1945); Y. A. Gorin, Zh. Obshch. Khim. 20, 1596 (1950); Kirk-Othmer Encyclopedia of Chemical Technology vol. 4 (New York, 3rd ed., 1978) p 322.