摘要
以正硅酸四乙酯(TEOS)为硅胶(SG)的来源,将硅胶用丁二酸(SA)功能化之后,采用溶胶-凝胶法负载活性组分醋酸锌(ZnA),制备功能化硅胶负载醋酸锌催化剂(SG-SAZnA);并用红外光谱(IR)及X射线衍射法(XRD)对该催化剂进行了表征;通过用该催化剂催化合成月桂酸甲酯的实验,考察了反应时间、反应温度、醇酸摩尔比、催化剂用量对反应酯化率的影响,探讨了该催化剂的催化性能。结果表明,在醇酸摩尔比为7∶1,催化剂用量为酸质量的5%,75℃下反应1.5 h,酯化率最高达75%;催化剂重复使用5次后,月桂酸的酯化率仍可达73.8%。
Tetraethoxysilane（TEOS） was employed as the silica-gel（SG） source.The SG was functionalized by succinic acid（SA） and further used for supporting the active component zinc acetate（ZnA） by sol-gel method to develop a zinc acetate complex supported over functionalized silica-gel catalyst（SG-SAZnA）.The catalyst was characterized by Fourier transform infrared spectroscopy（FTIR） and XRD.Laboratory test for synthesis of methyl laurate using SG-SAZnA as catalyst was carried out to assess the performance of the catalyst as well as to investigate the effects of various process conditions such as reaction temperature,reaction time,mole ratio of methanol to lauric acid and the catalyst dosage on the conversion.Experimental results showed that as the mole ratio of methanol to lauric acid is 7∶1;the dosage of catalyst is 5% of the lauric acid;the reaction temperature is 75 ℃ for 1.5 h;the conversion of lauric acid achieves 75%.After the catalyst reused for 5 times,the conversion can still achieve 73.8%.
出处
《日用化学工业》
CAS
CSCD
北大核心
2009年第6期399-401,444,共4页
China Surfactant Detergent & Cosmetics
基金
安徽省教育厅自然科学基金资助项目(KJ2009B105)
安徽工程科技学院青年基金资助项目(2006YQ032)
