简介:以2-氯-2-氯甲基-4-氰基丁醛(CCC)为原料,采用三光气作为氯化剂,通过环合反应合成了2-氯-5-氯甲基吡啶。通过单因素实验和正交优化实验确定了环合反应的工艺条件,并对环合反应的机理进行了探讨。优化后的反应条件为:以甲苯为反应溶剂,反应温度为90℃,物料滴加时间为2h,n(CCC)∶n(三光气)∶n(DMF)=1∶0.35∶0.9,采用滴加三光气甲苯溶液的方式投料。在优化工艺条件下,反应收率为86.2%,纯度为99.2%,反应收率高于三氯氧磷工艺15%以上,废水减少80%以上,废固减少30%以上,是一条适合工业生产的工艺路线。
简介:Byusingthebimodalmesoporoussilica(BMMS)asthecarrierandbutyltitanateasthetitaniumsource,theTiO2/BMMScatalystwasprepared.ThesampleswerecharacterizedbyXRD,XRF,N2adsorptionanddesorption,FTIR,UVvis,SEM,EDS,andTEMtechniques.ThetestresultsshowedthatTiO2wasamorphous,theTiO2/BMMScatalysthadanorderedbimodalmesoporousstructure,andthechemicalinteractionexistedbetweenBMMSandTiO2.SincetheTiO2/BMMShadalowerbandgap,itsphotocatalyticactivitywasbetterthanTiO2.UnderUVirradiationaone-potPODSsystemwassetup,usingTiO2/BMMSasthecatalyst,H2O2astheoxidant,andmethanolasthesolvent.TheTiO2/BMMScatalystshowedbetterphotocatalyticactivitythanthemono-modalmesoporousTiO2/SBA-15catalyst,andthedesulfurizationrateofdibenzothiophene(DBT)overTiO2/BMMScatalystcouldreach99.2%.TheTiO2/BMMScatalystalsohadsogoodstabilitythatthedesulfurizationrateofDBTdidnotdropapparentlyafter8cyclesofreusing,andcouldstillbecloseto90%.
简介:二进制蒸汽液体平衡(VLE)数据为2-propanol/ethanediol和ethanediol/potassium醋酸盐(KAc)的系统被测量。为propanol/ethanediol的系统的VLE数据用热力学的一致性测试被测试。y1和P的平均价值分别地是0.0776和0.1542kPa。VLE数据的上述二个集合与NRTL模型一起被相关。为2-propanol/water/KAc的系统的第三的VLE数据被用来为2-propanol/KAc和water/KAC(叫的TDCM)的二进制系统获得NRTL模型的更合适的参数。为multicomponent系统,第三、第四级,NRTL模型预言的VLE价值与文学数据同意了很好。KAc的KAc,ethanediol和在2propanol和水之间的轻快上的ethanediol的影响分别地被调查。结果证明上述材料和混合物在在2-propanol和水之间的轻快上有不同影响。为咸包含的VLE的关联和预言的方法为说的系统简单、有效。
简介:TheMoS2catalystswerepreparedfromvariousmolybdateprecursorsincludinginorganicandorganicmolybdatecompounds.ThesulfidationdegreeandmorphologyofactivephasesofMoS2activatedbyvariousmolybdateprecursorsinH2S/H2streamatdifferenttemperatureswerestudiedbyX-rayphotoelectronspectroscopy(XPS)andhigh-resolutiontransmissionelectronmicroscopy(HRTEM).TheorganicmolybdateprecursorsleadtoMoS2catalystswithhighersulfidationdegreeandsmalleractivephasestodemonstratehighercatalyticactivityduringhydrodesulfurizaiton(HDS)of4,6-DMDBT.