简介:以固载杂多酸盐TiSiW12O40/TiO2为多相催化剂,己二酸与正丁醇反应合成了己二酸二丁酯.通过正交试验探讨了反应物配比、催化剂用量及反应时间对产物收率的影响.试验结果表明,TiSiW12O40/TiO2对合成己二酸二丁酯具有良好的催化活性.在n(正丁醇)∶n(己二酸)=3.5∶1、催化剂用量为反应物料总量的1.0%、反应时间1.5h、反应温度86~121℃的条件下,己二酸二丁酯收率可达75.1%.
简介:Throughimprovingtheagingprocessduringsynthesisofthesupport,γ-Al2O3withlargeporevolumeandhighsurfaceareawassynthesizedbyafacilesecondaryreformingmethod.Thesynthesisparameters,suchasthereactiontemperature,thefirstagingtemperatureandthesecondagingtemperature,wereinvestigated.Thetexturalpropertiesofγ-Al2O3werecharacterizedbymeansofN2adsorption-desorptionisotherms,X-raypowderdiffractometry(XRD),scanningelectronmicroscopy(SEM),Fouriertransforminfrared(FTIR)spectroscopyandthermogravimetry(TG).TheexperimentalresultsindicatedthatAACHandamorphousAlOOHweretheprecursorsofalumina,whichwereformedviaprecipitationfromsolutionsafterreactionofaluminumsulphatewithammoniumhydrogencarbonate.Theprecursornanocrystallitesgrewandre-assembledduringthesecondaryreformingprocess,whichresultedinanincreasedporesizeandporevolumeandadecreasedbulkdensity.Theas-synthesizedγ-Al2O3materialsfeaturedmeso/macroporosity,largeporevolume(2.175cm3/g),highsurfacearea(237.8m2/g),andlowbulkdensity(0.284g/mL).
简介:天津市昌昊化工股份合作公司是中国石油集团工程技术研究院在发展科技产业化进程中,尝试股份合作制组建的科技企业,主要产品是一水硫酸镁,用于热带作物的肥料,产品面向国外市场。在发展过程中,昌昊化工采取了一种和贸易企业合作的生产模式,三年累计给股东的回报已达175%。