以无机天然粘土或用金属离子交换处理粘土制备的改性粘土作为固体酸催化剂 ,因其具有选择性好、廉价、易再生及无环境污染等特点 ,正成为目前绿色化学研究的热点 ,特别是经离子交换制备的改性粘土应用于芳烃的选择性硝化反应的研究 ,已取得较大的进展。该改性固体酸催化剂中改 As a solid acid catalyst, the modified clay prepared by inorganic natural clay or metal ion exchange treated clay is becoming a hot research topic in green chemistry due to its characteristics of good selectivity, low cost, easy regeneration and no environmental pollution. In particular, The modified clay prepared by ion exchange has been applied to the selective nitration of aromatics and great progress has been made. The modified solid acid catalyst modified