有机阴离子柱撑水滑石催化酯交换合成碳酸二苯酯

？Aseriesoforganicanion-pillaredhydrotalcitesweresynthesizedbytheionexchangemethodandcharacterizedbyX-raydiffractionandFouriertransforminfraredspectroscopy.Thehydrotalciteprecursorandpillaredhydrotalciteswithdifferentanionswastestedascatalystsintransesterificationofdimethylcarbonate(DMC)withphenol.Theresultsshowthatthecatalyticselectivityofthistransesterificationreactionovertheseorganicanion-pillaredhydrotalcitesissignificantlyimproved.ThecatalyticselectivitiesofC4H4O4-,C6H8O4-,C10H16O4-,1,4-C8H4O4-,andC7H5O2-pillaredhydrotalcitesfortransesterifiedproducts(diphenylcarbonateandmethylphenylcarbonate)areallgreaterthan90%,atleast10%higherthanthatofthehydrotalciteprecursor.Undertheconditionsofn(phenol)/n(DMC)=4,catalystamount=1.5%,andt=10h,theC6H8O4-pillaredhydrotalcitepresentsthebestcatalyticperformance,andtheDMCconversionandtheselectivityfortransesterifiedproductsreach43.8%and93.2%,respectively.