PROCESS FOR ISOMERIZATION OF 2-HALOTHIOPHENE TO-3-HALOTHIOPHENE

摘要

An improved process and catalyst system for the isomerization of halothiophenes. More particularly, an improved process for the isomerization of 2-halothiophenes to 3-halothiopenes by reacting a w-halothiophene with a catalyst and in the presence of a base. The addition of a base additive to the acidic zeolite catalyst allows the desired isomerization to take place while suppressing side-reactions that result in the decomposition of the thiophene rings. The catalyst lifetime is thus increased and the amount of catalyst needed for the reaction is reduced, lowering cost.