In the catalytic oxidation of methane with steam in the presence of nickel, the promoter action of several metallic oxides were investigated. It was found that the largest quantity of CO2 was obtained by employing the catalyst promoted with Al2O3, whilst when water vapour was regulated the catalyst promoted with MgO gave the largest yield of CO. These results might possively lead one to suppose that the reaction may be looked upon as taking place successively in the manner: (Remark: Graphics omitted.) and as the beneficial effect of promoters in these reactions may be to transfer water molecules to the reaction centers of the catalyst where the action of water on methane is carried out, the products may be determined according to the adsorbing intensity of water molecules and the size of the promoter. Thus it seems to us that the results we obtained are quite in good agreement with Balandin’s “ Multipletthypothese.”
In order to see the effect of the carbonyl group, action of hot dilute and cold concentrated sulphuric acid on αα-dimethyl-β-acetyl glycol was studied. This keto-glycol was found to undergo semihydrobenzoin rearrangement and dissociation into acetone and acetol simultaneously. The primary product of the semihydrobenzoin rearrangement of this glycol being decomposed during the subsequent treatments, only the secondary products, methyl-isopropyl ketone, could be isolated. The dissociation of dimethylacetyl-glycol was started not only by acid, but also by alkali. These results can be easily deduced from the electronic interpretation given in previous papers. That the dissociation of dimethyl-acetyl glycol takes place merely by distillation was directly proved by identifying acetol by a new method. Methods to identify acetone, methyl-ethyl ketone, methyl-isopropyl ketone, acetol and dimethyl-acetyl glycol with limited quantity of the sample in presence of one another, were carefully studied and established.