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- 脱铝超稳Y沸石（DUSY）dealuminated USY(DUSY)
- 制备了一系列以脱铝超稳Y沸石(DUSY)为载体的磷钨酸(PW)及其铯盐催化剂,考察了催化剂在以乙酰乙酸乙酯和1,2-丙二醇为原料催化合成草莓酯反应过程中的性能。A series of 12-phosphotungstic acid(PW)and their Cs salts catalysts supported on dealuminated ultra-stable Y zeolite(DUSY)were prepared. Their catalytic activities were measured by synthesis of fructone-B from ethyl acetoacetate and 1,2-propanediol.
- 超稳Y沸石ultrastable Y zeolite
- 超稳Y型沸石上的异辛烷裂化反应CRACKING REACTION OF ISOOCTANE OVER ULTRASTABLE Y ZEOLITES
- 超稳Y-沸石催化合成乙酰乙酸乙酯缩酮Synthesis of Ethyl Acetoacetate Ketals Catalyzed by Dealuminated Ultrastable Y-Zeolite
- 不同方法处理的脱铝Y沸石的结构特征研究Studies on Structural Characteristics of Deal uminated Y Zeolites Treated by Different Methods
- 同时又计算了脱铝过程亚稳态的铝-铝次邻分布{Al(mAl)}和硅-铝近邻分布{Si(nAl)}.Both the next-nearest-neighbour Al-Al ions distribution, Al(mAl) and the nearest-neighbour Si-Al ions distribution, Si(nAl) for the dealuminated faujisite were calculated simultaniously from the same sample space simulating the sequence of metastable states.
- (NH_4)_2SiF_6脱铝八面沸石酸性和1-己烯结碳研究A STUDY ON ACIDITY AND COKING ACTIVITY OF (NH_4)_2SiF_6 DEALUMINATED FAUJASITES
- 具体工艺措施为:经过预脱铝处理的超低S、P工业纯铁,在50kg真空感应炉中依靠碳氧脱氧反应进行初脱氧、深脱氧和合金化处理,炼成42CrMo钢,最后在电子束炉中经过两次重熔,得到全氧量为T.The ingot iron containing extra-low sulfur and phospnorus, which has been pretreated with dealuminization, is refined into the steel 42CrMo in a 50 kg vacuum induction furnace by way of primary and secondary deoxidizations using carbon and alloying process. Then, the steel is remelted twice in a vacuum electron-beam melting (EBM) furnace to obtain 42CrMo steel ingots of which the total oxygen content T.
- 采用原位红外和TPD－ITD研究了二异丙苯、异丙苯、苯和丙烯在Y沸石催化剂上的吸附和脱附。The adsorption and desorption of propylene,benzene,isopropylbenzene(IPB) and di isopropylbenzene(DIPB) over Y type zeolite catalyst were studied by using in situ IR and TPD ITD methods.
- 摘要本文用X射线衍射法定量分析了水泥水化产物中的钙矾石，得到了较为准确的结果，该方法对研究钙矾石的形成机理和膨胀机理提供了重要的参考依据，具有理论和实际意义。Ettringite in cement hydration products "Value k" method of XRD and some accurate results were obtained. This method shows practically significant in studying the formation mechanism and stability of ettringite.
- 烷烃在超稳 Y 及 HY 型沸石上的催化裂化减活作用Catalyst Deactivation of Ultra-stable Y and HY Type Zeolites for the Cracking of Hydrocarbon
- 用~(29)Si(~(27)Al)MAS NMR和辅加乙酰丙酮(acac)处理样品的静态~(27)Al NMR研究了镧离子对脱铝Y型沸石(DAIY)骨架硅、铝和非骨架铝(EFAL)的影响.The influence of lanthanum ions on the framework silicon, aluminum and extra-framework aluminum of LaDAlY zeolites has been studied by using 29Si, 27A1 MAS NMR and static 27Al NMR with acetylacetone treatment.
- 直接法ZSM－5沸石分子筛骨架铝的迁脱规律STUDIES ON THE MIGRATION OF FRAMEWORK Al OF ZSM 5 SYNTHESIZED BY DIRECT METHOD
- 用X射线衍射、核磁共振、红外光谱、原子吸收等方法测定了不同脱铝条件对沸石骨架的影响; 用红外光谱和正己烷裂解反应考察了不同处理条件对其酸性和催化活性的影响。X-ray diffraction, NMR, IR and AAS were used to investigate the effect of different dealumination conditions on the framework of zeolite L. IR and n-hexane cracking reaction were used to investigate the effect of different treatment conditions on acidity and catalytic activity.
- HY经脱铝制得高硅八面沸石,并经SiCl_4和(NH_4)_2SiF_6分别改性后的样品称之为Y(T)和FSY. 采用异丙苯裂化反应比较了它们的活性衰减与结焦之间的关系.Highly siliceous faujasite was prepared by dealumination of synthetic Y-type zeolite and was then modified with (NH_4)_2SiF_6. The decay of cracking activity and coke deposition on SiCl_4 modified zeolites,Y(T-1,2,3),were compared with those modified with SiF_6, FSY-l,2,3,by catalytic cracking of cumene in a continuous laboratory reactor.
- 采用27Al MAS NMR、N2吸附-脱附、IR等表征技术及XRD Rietveld结构精修的方法,通过清除和交换引入非骨架铝,探讨了USY沸石中非骨架铝的形态。The type and the chemical state of non-framework aluminum and the related influence on zeolite acidity were investigated by means of 27Al MAS NMR,N2 adsorption-desorption,XRD Rietveld refinement.
- 采用水热焙烧和向H_2SiF_6-NH_3脱铝补硅超稳Y沸石体系中添加适量Al_2(SO_4)_3的方法制备出几种铝分布均匀的超稳Y沸石分子筛。A few species of ultrastable Y zeolite with homogeneous aluminium distribution were prepared by means of combining hydrothermal roast and adding some A12(SO4)3 into the H2SiF6-NH3 dealumium ized and silicon enriched ultrastable Y zeolite slurry.
- 其次,稀土超稳Y沸石中总的非骨架铝(N_(Al))_EF,随脱铝深度的增加而增加,仅只在REUSY-38的~(27)Al MAS NMR谱中观察到Al~(a+)非骨架铝的存在.For the four REUSY zeolites, the total extra-framework aluminums (N_(Al))_(EF) increase with the increase of depth of dealumination, the (N_(AI))_(EF) appeared as Al~(3+) are only observed in ~(27)Al MAS-NMR of REUSY-38 spectrum.
