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Porous plate, acid-washed kaolin, activated alumina, pumice, aluminum, and iron were employed as carriers for vanadium pentoxide with some success. Molybdenum oxide on porous plate and vanadium pentoxide-molybdenum oxide (1 to 1) mixture on acid-treated pumice had some catalytic action. Traces of nitrile were detected when the following were employed as catalysts: silver vanadate on acid-washed porous plate, vanadium pentoxide on iron, platinized aerogel, alkali-washed kaolin, vanadium pentoxide-thorium oxide (3 to 2), titanium dioxide on kaolin, and cupric oxide or potassium bisulfate on acid-washed pumice.The activity of the fused vanadium pentoxide was retained over an extended period of use. In experiment 38 a 31.7% yield of nitrile was obtained after the catalyst had been used for 13 hours. After 97 hours a 33.1% yield of nicotinonitrile was obtained in experiment 39 under experimental conditions otherwise comparable to those of experiment 38. ACKNOWLEDGMENTThe authors are indebted to C. O. Willits and W. L. Porter of the Analytical and Physical Chemistry Division for the analyses upon which the yields of nicotinonitrile were based. LITERATURE CITED(1) Graver (to Barrett Co.), U. S.

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Water-insoluble Esters and Amides of Nicotinic Acid 1135 results of the distillation and subsequent analysis are shown in Table II.Analytical Methods Employed.-Iodine numbers were determined by the standard Wijs (one-half hour) method. Molecular weights were determined cryoscopically in benzene on methyl esters only. Per cent, hydroxyl was determined by a method recently developed by C.

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