A process for the treatment of a quaternary onium salt is described. The process comprises the steps of (i) contacting an organic phase sparingly miscible in water containing a quaternary onium fluorine-containing carboxylate of RfCO₂⁻⁺AR¹R²R³R⁴ as defined in the present Specification with an aqueous phase containing a thiocyanate ion to form a quaternary onium thiocyanate in the organic phase and (ii) contacting the organic phase containing the quaternary onium thiocyanate with an aqueous solution containing a water-soluble oxidizing agent to decompose the thiocyanate ion and to form an easily ion exchangeable quaternary onium salt. Also, applications of this treatment to a process for preparing hexafluoropropylene oxide from hexafluoropropylene in a two-phase system of an aqueous phase and an organic phase by using a hypochlorite as an oxidizing agent in the presence of a quaternary onium salt as a catalyst are described.
描述了一种处理季鎓盐的工艺。该工艺包括以下步骤:(i) 将有机相与
水接触,有机相中含有 RfCO₂-⁺AR¹R²R³R⁺的季
铵氟RfCO₂-⁺AR¹R²R³R⁴ 的
羧酸盐的有机相与含有
硫氰酸根离子的
水相接触,以在有机相中形成
硫氰酸季
铵盐,以及 (ii) 将含有
硫氰酸季
铵盐的有机相与含有
水溶性氧化剂的
水溶液接触,以分解
硫氰酸季
铵盐。使
硫氰酸根分解,形成易于离子交换的季
铵盐。此外,还介绍了在
水相和有机相两相体系中使用
次氯酸盐作为氧化剂、季
铵盐作为催化剂从
六氟丙烯制备
六氟环氧丙烷的工艺中应用这种处理方法的情况。