求助翻译para selectivity? toluene was mononitrated with good para-selectivity in the presence of clays etc. as catalysts and supports. it is found that bentonite is an cheap, efficient and clean catalyst. 粘土等固体催化剂和载体在芳烃甲苯硝化反应中表现出强的 对位选择性 催化能力和催化活性,皂土等粘土是一种廉价有效的清洁型催化剂。 查看更多