钛酸四丁酯催化合成邻苯二甲酸双十八酯

以邻苯二甲酸酐和十八醇为原料,钛酸四丁酯为催化剂催化合成了邻苯二甲酸双十八酯,探讨了十八醇和邻苯二甲酸酐摩尔比、反应温度、催化剂用量、反应时间等条件对邻苯二甲酸酐酯化率的影响,结果为:n(十八醇)/n(邻苯二甲酸酐)=2.2,m(钛酸四丁酯)/m(邻苯二甲酸酐)=0.75%,在200℃下搅拌反应1 h,邻苯二甲酸酐的酯化率即可达98.2%;反应1.5 h,酯化率可达99.9%。用钛酸四丁酯作催化剂,反应时间短,催化剂用量少,催化活性高。

Synthesis of Dioctadecyl Phthalate Ester Catalysted By Ti(OC4H9)4

Dioctadecyl phthalate ester was synthesized using phthalic anhydride and stearyl alcohol as raw materials and Ti(OC4H9)4 as catalyst.Thus,with n(stearyl alcohol)/n(phthalic anhydride)=2.2,m(Ti(OC4H9)4)/m(phthalic anhydride)=0.75%,reacting at 200 ℃ for 1 h or 1.5 h,the esterification rate of phthalic anhydride is 98.2% or 99.9% respectively.The reaction time is short,the quantity of catalyst is small,and the catalytic activity is high when Ti(OC4H9)4 was used as catalyst.