3725.     WINTER, H.  [Catalysts and Materials of Hydrogenation.]  Glückauf, vol. 73, 1937, pp. 420-424; Coal Carbonisation, vol. 3, 1937, p. 114.

        Importance of catalytic research and investigations on hydrogenation reaction vessels in relation to the German 4-year plan is emphasized.  The limitations of light metals (sp. gr. below 5) and their applications in binary catalysts are noted.  For economic reasons, special interest attaches to the less expensive of the heavy metals.  The degree of activity of catalysts is important in securing the desired product (for example, motor fuels and not CH₄).  The stability, freedom from poisoning, and ready regeneration of catalysts are important factors.  The present state of knowledge on these matters is reviewed with reference to original sources, and the various mechanical forms in which catalysts are used, ranging from sheets to colloidal suspensions, are discussed.  Methods of increasing the activity of catalysts and the various theories of catalytic action are considered.  The special requirements of constructional materials for reaction chambers and the like are noted.  Plain C steels are not satisfactory; instead, low-C special steels (Ni-Cr, W, and other alloys) are used.  Many data relating to specified materials and reactions incorporated.

        WINZER, K.  See abs. 1035, 2624, 2625.