【摘要】 以苯酐和正丁醇为原料,用自制的SO42-/SiO2、SO42-/Fe2O3、SO42-/SnO2及固体铁系为催化剂,催化合成邻苯二甲酸二丁酯(DBP),分别考察固体酸催化剂的种类、固体酸催化剂的用量、醇酐摩尔比和反应时间等因素对合成DBP产率的影响。试验结果表明,其中SO42-/SnO2催化剂催化活性高。在苯酐0.1 mol(14.8 g)、固体酸催化剂m(SO42-/SnO2)/n(苯酐)为16(g/mol)、醇酐摩尔比2.5、带水剂二甲苯200[mL/mol(苯酐)]、反应时间4.0 h的条件下,其产率达94.0%以上,寿命长、可多次重复使用、产物易纯化分离、且产品色泽浅等优点,可望代替传统浓硫酸作催化剂应用于DBP的合成。更多还原

【Abstract】 DBP was prepared by esterification of n-butanol and phthalic anhydride catalyzed by the self-made catalyst of SO^2-₄/SiO₂,SO^2-₄/Fe₂O₃,SO^2-₄/SnO₂,solid iron series strong acid.The effects,such as the sort of solid acid,the amounts of catalyst,the ratio of butanol to phthalic anhydride,the reaction time and so on,on the esterification were discussed.The optimal reaction conditions are obtained.The results showed that SO₄/SnO₂ has high catalytic activity.When phthalic anhydride is 0.1 mol（14.8 g）,the solid acid catalyst with m(SO^2-₄)/n（phthalic anhydride） is 16 g/mol,the ratio of butanol to phthalic anhydride is 2.5,xylene is 200 mL（per molar phthalic anhydride）,reaction time is 4 h,the yield of product is more than 94.0%.The catalyst has a long life span and can be used many times.The product is easily separated and purified with better color.The catalyst will be a promising replacement of H₂SO₄ in the synthesis of DBP.更多还原