改性硫酸钛催化合成氯乙酸异辛酯  

Catalytic synthesis of 2-ethylhexyl chloroacetate by modified titanium sulfate

作　　者：毛立新[1] 廖德仲[1] 何节玉[1] 方潍 

机构地区：[1]湖南理工学院化学化工系,湖南岳阳414000 [2]岳阳新振升铝材有限公司,湖南岳阳414006

出　　处：《湖南理工学院学报（自然科学版）》2005年第1期87-90,共4页Journal of Hunan Institute of Science and Technology(Natural Sciences)

摘　　要：以固体硫酸钛经 4 5 0℃灼烧后制得改性硫酸钛 ,用改性硫酸钛吸附吡啶后的IR光谱表征其表面酸性 ;用氯乙酸和异辛醇的酯化反应考察其催化活性。结果表明 ,改性硫酸钛表面存在明显的Br nsted酸中心 ;并研究了酯化反应的优化条件 :当n(异辛醇 ) :n(氯乙酸 )为 1.1:1;催化剂用量为反应物料质量的 2 .5 %时 ,反应时间 90min ,氯乙酸异辛酯的收率达到 95 .8%。A new type of solid acid catalysts was prepared by calcination of titanium sulfate at 450 ℃, and the acid property was characterized by IR spectra of pyridine absorbed on the surface. The catalytic activity was determined for synthesis of 2-Ethylhexyl chloroacetate. The results showed that the catalysts had Brnsted acid centers and the catalytic activity increased with modified of calcination. By esterification of chloroacetic acid with 2-ethylhexyl alcohol, and reaction conditions have been discussed. The yield of the ester could reach 95.8% under the amount of moler ratio of 2-Ethylhexyl alcohol to chloroacetic acid 1.1:1. Time of reaction was 90 min.Amount of catalyst was 2.5%.

关 键 词：氯乙酸异辛酯 硫酸钛 催化合成 改性 

分 类 号：O621.3[理学—有机化学]