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298 个结果
  • 简介:ATi/Sicomplexzeolitehasbeenprepared.X-raydiffractionandinfraredspectrometrystudyhasshownthattwostructures,namelytheZSM-5andMCM-41,existinthesample.BETtestshaverevealedthatthecomplexzeolitecontainsregularmesoporesof2.6nm.UltravioletspectrometryanalysishasshownthattheTispeciesexistinthezeoliteskeletonintheformoftetra-coordinatevalence.TheTi/Sicomplexzeolite(TS-1/Ti-MCM-41)hasapparentlyimprovedcatalyticactivitywithrespecttothemacromolecularorganiccompoundoxidationascomparedtoindividualcomponentsofeitherTiorSicontainingzeolites(TS-1andTi-MCM-41).

  • 标签: 钛硅沸石 分子筛 TS 高分子有机化合物 催化剂
  • 简介:Chromiumacetylacetonateandbis(diphenylphosphino)isopropylaminewerecoordinatedinsituandsupportedonmethylaluminoxane-modifiedsilica.Thecatalyststructureandeffectsofreactiontemperature,reactionpressureandAl/Crmolarratioonethylenetetramerizationwereinvestigatedindetail.Chromiumwasuniformlyandfirmlyimmobilizedonthesupportandcouldnotbeleachedoffbymethylaluminoxane.Thesupportedcatalyst,uponbeingactivatedwithmethylaluminoxane,exhibitedcatalyticactivityof1.70×107g/(molCr·h)forethylenetetramerizationtoform1-octeneatareactiontemperaturesof80℃,apressureof2.0MPaandanAl/Crmolarratioof300.Thesupportedcatalystpresentedagoodtolerancetohightemperature.

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  • 简介:苯受美国海湾和欧洲现货价格走强及预期12月份美国合同价格较高支持,亚洲现货市场价格获得进一步上涨动力。美国和欧洲现货价格转变的非常及时,尤其是在台湾用户11、12月份需求比预期疲软的情况下,另外苯乙烯单体衍生物需求反弹也使市场气氛得以振奋。韩国生产商提高12月份报价高于400美元/吨(FOB),认为12月份剩下的现货出口量约30,000吨,目前库存已经很低。据说12月份船货贸易商递价在380—390美元/吨(FOB韩国),预计美国海湾12月份合同价格定在1.40美元/吨(FOB美国海湾)。

  • 标签: 亚洲 芳烃 市场行情
  • 简介:OnDecember18,2007theconstructionof800-kt/aethyleneprojectwaskickedoffintheHongshandistrictofWuhancity.Thisprojectwillbesetupaccordingtotheconceptsofforminganintegratedprojecttoconnecttheupstreamunitswiththedownstreamoneswhilebeingsupportedbyoilrefin-

  • 标签: 中国 乙烯 生产技术 容积量