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FT - IR 및 XPS 를 이용한 1 , 2 - 이수산화벤젠의 부틸화반응 촉매특성연구
박상언,박용기,유중환,이철휘 한국공업화학회 1999 응용화학 Vol.3 No.1
tert-Butylation of DHB (1,2-dihydroxybenzene) is carried out over ZSM-5 with three different Na cation-exchange levels and SiO₂/A1₂O₃ ratios. When Na cation-exchange level or SiO₂/A1₂O₃ ratio of ZSM-5 increases, the conversion and DTBC (3,5-di-tert-butylcatechol) selectivity decreases and 3-TBC (3-tert-butylcatechol) selectivity grows. However, selectivity for 4-TBC(4-tert-butylcatechol) is not changed significantly. Variation of catalytic activity and product selectivity over ZSM-5 catalysts are compared and discussed in terms of the concentration and strength of acid site determined by FT-IR and XPS. From this result, stronger Bronsted acid site seems to be responsible for the tert-butylation of DHB.