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The Various Urushibara Catalysts and Their Charac
Preparation of the Urushibara Catalysts
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absorbed acetic acid acetophenone AcOH alcohol alkali aluminum grains amines amount of alkali amount of hydrogen amount of zinc aromatic benzene benzonitrile benzophenone benzyl carbonyl catalyst prepared catalytic activity catalytic reduction Chem chloride crystals cobalt crystallite cyclohexanone decanted dibenzylamine diethyl diffraction pattern digestion dioxane distilled dried Entry estrone ethanol ethyl ethylenic g of nickel heated high activity High Pressure hydrogen uptake Initial pressure kg/cm2 iron(III ketones method minutes mixture ml beaker mole of hydrogen nickel chloride solution Nickel content nitriles nitrobenzene obtained from nickel ordinary ppt-metal precipitated metal precipitated nickel presence of U-Ni-B Raney nickel reduction of cyclohexanone room temp room temperature small amount sodium hydroxide sodium hydroxide solution solid solvent stirring Table tion toluene U-Fe(II U-Ni U-Ni-A and U-Ni-B U-Ni-A catalyst U-Ni-BA Urushibara catalysts Urushibara nickel catalysts vapor-phase water bath X-ray diffraction yield zinc and zinc zinc dust zinc hydroxide zinc hydroxide chloride zinc oxide