1. The confirmation of tert-C4H9OSO3H, which has been assumed as the intermediate compound in the hydration and polymerisation of isobutylene with sulphuric acid, has been attempted in the form of sodium or barium salts though with negative results. 2. The reaction mechanism of the hydration reaction of isobutylene with sulphuric acid has been discussed. Experimental results can be explained by the assumption that tert-C4H9OSO3H formed is very reactive to undergo rapid hydrolysis to establish the following equilibrium rapidly. (Remark: Graphics omitted.)
(1) A method for calculating both reaction velocity and activation energy in the case when the reaction has been carried out in the thermal separation column of Clusius and Dickel has been described. (2) The method has been applied to the polymerisation reaction of acetylene previously investigated by the present authors. (3) It has been found that the calculated heat of activation is slightly smaller than our preliminary value, but larger than the directly observed value by Taylor and van Hook, and that the calculated velocity constants are several times larger than those hitherto have been observed.
The hydroxides of manganese, iron cobalt, nickel, copper and lead show, by autoclaving, more or less dehydrating tendency and undergo contraction of sedimentation volume. The hydroxides of manganese, iron, cobalt and copper are dispersed by autoclaving in the presence of Al-hydroxide. The sols of the hydroxides of Al∼Co and of Al∼Cu show “schlieren effect”.