简介：Chromiumacetylacetonateandbis(diphenylphosphino)isopropylaminewerecoordinatedinsituandsupportedonmethylaluminoxane-modifiedsilica.Thecatalyststructureandeffectsofreactiontemperature,reactionpressureandAl/Crmolarratioonethylenetetramerizationwereinvestigatedindetail.Chromiumwasuniformlyandfirmlyimmobilizedonthesupportandcouldnotbeleachedoffbymethylaluminoxane.Thesupportedcatalyst,uponbeingactivatedwithmethylaluminoxane,exhibitedcatalyticactivityof1.70×107g/(molCr·h)forethylenetetramerizationtoform1-octeneatareactiontemperaturesof80℃,apressureof2.0MPaandanAl/Crmolarratioof300.Thesupportedcatalystpresentedagoodtolerancetohightemperature.

简介：Inthisstudy,titaniumdioxidesupportedbymulti-walledcarbonnanotubes(MWCNTs/TiO2)andCr-dopedTiO2supportedbyMWCNTs(MWNTs/Cr-TiO2)weresynthesizedbythesol-gelmethod.Thepreparedsampleswerecharacterizedbytransmissionelectronmicroscopy,X-rayphotoelectronspectroscopy,X-raydiffraction,theBrunauerEmmett-Telleranalysis,andtheRamanspectroscopy.TheoxidationandefficiencyforremovalofSO2inasimulatedfluegaswereinvestigatedexperimentallyinafixed-bedreactor.The15%MWCNTs/Cr-Ti02sampledisplayedexcellentadsorptionproperties,andaSO2removalrateequatingto30.4151mg/gfromthesimulatedfluegascontaining2300μg/gofSO2,8%of02,and5%ofH20wasachievedunderoptimalconditionscoveringatemperatureof333.15K,andaspacevelocityof1275h^-1.TheadsorptionprocesswasenhancedbecauseCrdopingmodifiedtheporestructureandinhibitedthegraingrowthofTiO2.Inaddition,theFreundlichandLangmuirmodelsrevealedthatSO2wasmainlyadsorbedthroughchemicaladsorptiononthesamplesurfaces,andthethermodynamicmodelanalysisindicatedthattheadsorptionwasaspontaneous,exothermic,andentropy-reducingprocess.TheadsorptionkineticsofSO2canbedescribedbythepseudosecond-orderkineticandtheBanghamdynamicsmodels.Thepossiblereactionmechanisminvolvedindesulfurizationprocesswasalsoproposed.

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简介：本文梳理回顾了我国1号、2号、3号喷气燃料标准的制修订背景和过程,分析比较了不同版本标准在检验项目、技术指标设置、文本和编排方式等方面的变化。喷气燃料的质量要求高,生产要求非常严格,检验项目也比汽、柴油更全面[1-7]。由于飞机飞行的特殊性,喷气燃料必须具备良好的使用性能和可靠的安全性。

简介：密度功能的理论(DFT)被采用了调查电子struc-turgsEMM+(1-emyl-3-methylimidazolium+)，CuCl_2~-，Cu2Cl3~-CuCl_2~-,EMIM+-Cu2Cl3-和EMIM+-CuCl_2~-，EMIM+-Cu2Cl3-对。完整，EMIM~+的优化和频率分析，CuCl2，Cu2Cl_3~-，八起始的EMIM+-CuCl_2~-，并且六起始，EMTM+-Cu2Cl_3~-几何学在6-31+G用Gaussian-94软件包裹被执行了(d，p)基础，为氢的集合水平，碳，氮，氯原子和Hay-Wadt为铜原子的有效核心潜力。EMIM+-CuCl_2~-的最低精力的电子结构，EMIM+-Cu2Cl_3~-pairs，单身地，EMIM+，CuCl_2~-，和Cu_2Cl_3~-比较地被学习了。计算结果证明最低精力的优化EMIM+-CuCl_2~-对conformer是到有距离的CuCl_2~-飞机的五戒指一半平行在3.5A附近，当最低精力的EMIM+-Cu2Cl_3~-对conformer是对有在终端氯原子和EMIM+.The的5戒指飞机之间的约3.0A的距离的Cu2Cl_3~-飞机垂直的EMIM+的五戒指一半时，在阳离子和阴离子之间的结合是静电的相互作用和C-H-Cl氢键被费用帮助增强。频率分析建议因为想象的频率的缺席，所有静止的点是最小的点。EMIM~+的笨重不对称现象引起的相互作用的低精力，和阳离子和阴离子的费用分散产生离子的液体EMTM+-CuCl_2~-，和EMTM+-Cu2Cl_3~-的低融化的点；在阳离子和阴离子之间的距离引起的.The相互酌能被单个点精力调查扫描。

简介：以2，3－二氯萘醌与氨气为原料，甲醇作溶剂，制备了2－氨基－3－氯－1，4－茶醌。考察了反应条件对产品收率的影响，得到最件工艺条件：在二氯萘醌用量为0．1mol，氨与二氯萘醌的物质的量比为6，氨甲醇溶液含量15％～17％，反应温度20～25℃，反应时间4h，产品收率可达96％。

简介：聚氨酯事业部通过强化污水生化水回用等措施，使聚醚装置1～5月净化水耗用量同比降低3．0％，装置污水排放总量同比降低5．2％。事业部为减少COD的排放，利用现有的回用水装置，再进行适当处理，作为净化水补充水，以降低新鲜水用量。通过提高生化池处理后的出水水质，在确保循环水质的前提下，降低废水稀释比，以减少新鲜水用量。

简介：氯丁橡胶（CR）及聚酯型热塑性弹性体（TPEE）是汽车等速万向节护套的主要类型。采用GB/T1690《硫化橡胶或热塑性橡胶耐液体试验方法》测试了环烷基基础油、石蜡基基础油及聚α-烯烃合成基础油制备的润滑脂与CR及TPEE的橡胶相容性。结果表明,不同基础油制备的润滑脂对2种橡胶的相容性有较大的区别,且随着试验时间的延长,区别变得更加明显。总体而言,聚α-烯烃合成基础油制备的润滑脂对2种橡胶的橡胶相容性最好,石蜡基基础油制备的润滑脂次之,环烷基基础油制备的润滑脂最差。将3种基础油以等比例调配制备润滑脂,可以使润滑脂产品兼具良好的低温性能和橡胶相容性。

简介：Inthispaper,2-isopropylnaphthalenehasbeensynthesizedbythereactionofnaphthaleneandisopropylbromide,usingtriethylaminehydrochloride-aluminumchlorideionicliquidasthecatalyst.Theeffectofthecatalystcomposition,thereactiontime,thereactiontemperature,theionicliquiddosage,aswellasthemolarratioofthereagentsonthe2-isopropylnaphthaleneyieldwassystematicallyinvestigated.Theoptimalreactionconditionscover:anAlCl3toEt3NHClratioof2.0,areactiontimeof3h,areactiontemperatureof15.0℃,avolumefractionofionicliquidtothemixture(isopropylbromide,n-dodecaneandn-hexane)of9%,andanaphthalene/isopropylbromidemolarratioof4.0.Undertheoptimalreactionconditions,theconversionofisopropylbromidereached98%andtheselectivityof2-isopropylnaphthalenewasequalto80%.ThetestresultsverifiedgoodcatalyticactivityuponusingEt3NHCl-AlCl3ionicliquidasthecatalystforalkylationofnaphthalenewithisopropylbromide.Theactivityoftheionicliquidremainsunchangedafterithasbeenrecycledfor4times.

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简介：以2,6-二甲基苯酚、氧气为原料,氨水与乙酸铜为催化剂,合成得到了3,3′,5,5′-四甲基-4,4′-联苯二醌,得到反应的最佳条件为:2,6-二甲基苯酚的浓度为0.1g/mL,氨水与乙酸铜的摩尔比为0.43,温度为75℃,反应时间为6h,产率达到60%.

简介：Alkylationoftoluenewith2-chloro-2-methylpropane(t-Bu-Cl)tosynthesizepara-tert-butyltoluene(PTBT)wascarriedoutinthepresenceoftriethylaminehydrochloride-aluminumchlorideionicliquidsusedasthecatalyst.TheionicliquidswerepreparedwithdifferentmolarratiosofEt3NHCltoAlCl3,andtheeffectofthemolarratiobetweenAlCl3andEt3NHCl,thereactiontime,thereactiontemperature,theionicliquiddosage,aswellasthemolarratiooftoluenetochloro-2-methylpropaneonthealkylationreactionoftoluenewithchloro-2-methyl-propanewasinvestigated.ThetestresultsshowedthattheacidicionicliquidspreparedwithEt3NHClandAlCl3hadgoodactivityandselectivityforthealkylationreactionoftoluenewithalkylchloridetoproducePTBT.TheoptimalreactionconditionswerespecifiedatanAlCl3toEt3NHClratioof1.6,areactiontemperatureof20℃,amassfractionoftoluenetoionicliquidof10%,andachloro-2-methylpropanetotoluenemolarratioof0.5.Underthesuitablereactionconditions,a98%conversionofchloro-2-methylpropaneandan82.5%selectivityofPTBTwereobtained.Ionicliquidscouldbereused5timeswithitscatalyticactivityunchanged,andtheregeneratedionicliquidscanberecycled.

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简介：ThepolycrystallinephaseWO3/g-C3N4wassynthesizedunderstirringusingtungstenicacid(H2WO4)andgraphiticcarbonnitride(g-C3N4)asrawmaterials.ThecatalystwascharacterizedbyX-raydiffraction(XRD),scanningelectronmicroscopy(SEM),energydispersivespectroscopy(EDS),theFouriertransforminfraredspectroscopy(FT-IR),andtheBrunauer-Emmett-Telleranalysis(BET).ThepolycrystallinephaseWO3/g-C3N4wasdeterminedbyXRDtechnique.TheoxidativedesulfurizationprocesswasinvestigatedusingWO3/g-C3N4asthecatalyst,30%hydrogenperoxide(H202)astheoxidant,and1-butyl-3-methylimidazoliumtetrafluoroborate([bmim]BF4)ionicliquids(ILs)astheextractant.Theoperatingconditions,includingH2WO4amount,ILdose,H2O2volume,temperature,catalystdosage,andtypesofsulfurcompounds,weresystematicallyresearched.Thedesulfurizationratecouldreach98.46%forremovingdibenzothiophene(DBT)fromthemodeloilunderoptimalreactionconditions.Inaddition,thecatalyticactivitywasslightlydecreasedafterfiverecyclesofcatalysts.Thereactionkineticsanalysisshowsthattheoxidativedesulfurizationsystemwasinaccordwiththefirst-orderreactionkineticsequation.Themechanismofoxidativedesulfurizationwasproposed.

简介：针对金县1—1油田储层段地质特点，介绍了钻井液体系应具备的性能。根据钻井液体系应具备的性能，选择聚合醇钻井液体系（PEM）为基液，对其进行改性处理，考察了降滤失剂PAC—LV、生物聚合物XC及降失水剂SMP用量对钻井液体系性能的影响，确定了最佳钻井液体系配方，即改性PEM钻井液体系。对改性PEM钻井液体系进行抗温、抗盐污染及抑制性评价，结果表明，该钻井液体系具有良好的抗温、抗污染能力以及优良的润滑性及抑制性，满足了金县1—1油田储层段的钻井要求。

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