The reaction mechanism of ring cleavage was discussed.

A process for preparing 1-methoxy-2-propanol by selective ring cleavage-addition reaction of propylene oxide with MeOH in the presence of HM-9512 catalyst is described.

Temperature could influence not only the dechlorination rate, but also influence the reaction pathway. Dechlorination was first and then the cleavage of benzene ring at higher temperature;