Quantitative determination of olefin oxide, chlorohydrin, and cyclocarbonate in the presence of each other

A procedure was developed for the quantitative determination of olefin oxid e, chlorohydrin, and cyclocarbonate simultaneously present in the reaction mixture of the synthesis of cyclocarbonate from olefin oxide and CO2. To de termine olefin oxide, an acetone solution of hydrochloric acid was added to a portion of the reaction mixture, and the excess of hydrochloric acid was titrated with an aqueous solution of potassium hydroxide with visual detec tion. The concentrations of chlorohydrin and cyclocarbonate were calculated from the data of the potentiometric titration of the same solution to whic h excess potassium hydroxide was added.