Titanium copper-hydrogen system

Catalysts. Iodine and its compounds ate very active catalysts for many reactions (133). The principal use is in the production of synthetic mbber via Ziegler-Natta catalysts systems. Also, iodine and certain iodides, eg, titanium tetraiodide [7720-83-4], are employed for producing stereospecific polymers, such as polybutadiene mbber (134) about 75% of the iodine consumed in catalysts is assumed to be used for polybutadiene and polyisoprene polymeri2a tion (66) (see RUBBER CHEMICALS). Hydrogen iodide is used as a catalyst in the manufacture of acetic acid from methanol (66). A 99% yield as acetic acid has been reported. In the heat stabiH2ation of nylon suitable for tire cordage, iodine is used in a system involving copper acetate or borate, and potassium iodide (66) (see Tire cords). 

Cocco et al. [54] discuss the preparation of metallic glass, while copper-titanium, aluminum-titanium, and palladium-titanium systems in particular are prepared under a controlled atmosphere with hydrogen and argon. Components of Nb-Ni and Nb-Y have also been described [55]. Amorphous Ni-Ti alloys have been prepared by Schwarz et al. [56], while Ni-Ga, Ni-Ge, Ni-In, and Ni-Sn has been synthesized in supersaturated solid solutions [57]. Fe, Co, Ni-Ta-alloys are described by Lee and Yang [58], while FeSi2 doped with Co or Al for thermoelectric material is also mentioned [59]. 

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