The catalytic properties of acid-modified montmorillonite, kaolinite (Mongolia) and illite (Belarus) clays, as well as a commercial aluminosilicate catalyst AS-36 were studied in the liquid-phase isomerization of α-pinene and 3-carene. The largest conversion of α-pinene (100% after 6 h) was observed in the presence of illite clay treated with 10% HCl at 90 °C. The presence of only weak and medium acidic sites in the clays resulted in the formation of camphene (50.1–54.3%) as the main reaction product. Conversion of 3-carene increases with an increase of the total catalyst acidity. The reaction products were 2-carene (11.9–15.0%), mentadienes (35.5–48.5%), menthenes (7.9–17.1%) and cymenes (10,1–20.4%). The amount of mentadienes in the reaction mixture decreased while the opposite was observed for menthenes and cymenes with increase of concentration and strength of the acid sites. The kinetic model for 3-carene transformations was developed.

研究了酸改性的蒙脱土，高岭石（蒙古）和伊利石（白俄罗斯）粘土以及市售硅铝酸盐催化剂AS-36在α-pine烯和3-烯的液相异构化中的催化性能。在90°C下用10％HCl处理的伊利石粘土中，观察到最大的α-pine烯转化率（6小时后100％）。粘土中仅存在弱酸性和中酸性位点，导致形成了主要反应产物樟脑（50.1–54.3％）。3-烯的转化率随着总催化剂酸度的增加而增加。反应产物为2-胡萝卜素（11.9–15.0％），薄荷二烯（35.5–48.5％），月桂烯（7.9–17.1％）和苏木精（10,1–20.4％）。随着酸浓度和浓度的增加，反应混合物中薄荷二烯的含量降低，而薄荷脑和苏糖醇的情况则相反。建立了3-烯转化的动力学模型。