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采用固体超强酸催化剂由苯酐与 2 -乙基己醇通过酯化反应合成邻苯二甲酸二辛酯( DOP)。该固体酸由 Al2 O3 和浓硫酸复配而成 ,对非均相催化过程具有很高的活性和选择性。考察了工艺条件对转化率的影响。发现用 0 .2 % ( wt)～ 0 .3 % ( wt)超强酸催化剂 ,转化率接近1 0 0 %。
Dioctyl phthalate (DOP) was synthesized by esterification of phthalic anhydride and 2 - ethyl hexanol with solid superacid catalyst. The solid acid is composed of Al 2 O 3 and concentrated sulfuric acid, which has high activity and selectivity for heterogeneous catalysis. The effects of process conditions on conversion were investigated. Found with 0.2% (wt) ~ 0.3% (wt) superacid catalyst, the conversion rate close to 100%.