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- 脫鋁超穩Y沸石（DUSY）dealuminated USY(DUSY)
- 制備了一系列以脫鋁超穩Y沸石(DUSY)為載體的磷鎢酸(PW)及其銫鹽催化劑,考察了催化劑在以乙酰乙酸乙酯和1,2-丙二醇為原料催化合成草莓酯反應過(guò)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.
- 超穩Y沸石ultrastable Y zeolite
- 超穩Y型沸石上的異辛烷裂化反應CRACKING REACTION OF ISOOCTANE OVER ULTRASTABLE Y ZEOLITES
- 超穩Y-沸石催化合成乙酰乙酸乙酯縮酮Synthesis of Ethyl Acetoacetate Ketals Catalyzed by Dealuminated Ultrastable Y-Zeolite
- 不同方法處理的脫鋁Y沸石的結構特征研究Studies on Structural Characteristics of Deal uminated Y Zeolites Treated by Different Methods
- 同時(shí)又計算了脫鋁過(guò)程亞穩態(tài)的鋁-鋁次鄰分布{Al(mAl)}和硅-鋁近鄰分布{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脫鋁八面沸石酸性和1-己烯結碳研究A STUDY ON ACIDITY AND COKING ACTIVITY OF (NH_4)_2SiF_6 DEALUMINATED FAUJASITES
- 具體工藝措施為:經(jīng)過(guò)預脫鋁處理的超低S、P工業(yè)純鐵,在50kg真空感應爐中依靠碳氧脫氧反應進(jìn)行初脫氧、深脫氧和合金化處理,煉成42CrMo鋼,最后在電子束爐中經(jīng)過(guò)兩次重熔,得到全氧量為T(mén).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.
- 采用原位紅外和TPD－ITD研究了二異丙苯、異丙苯、苯和丙烯在Y沸石催化劑上的吸附和脫附。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射線(xiàn)衍射法定量分析了水泥水化產(chǎn)物中的鈣礬石，得到了較為準確的結果，該方法對研究鈣礬石的形成機理和膨脹機理提供了重要的參考依據，具有理論和實(shí)際意義。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.
- 烷烴在超穩 Y 及 HY 型沸石上的催化裂化減活作用Catalyst Deactivation of Ultra-stable Y and HY Type Zeolites for the Cracking of Hydrocarbon
- 用~(29)Si(~(27)Al)MAS NMR和輔加乙酰丙酮(acac)處理樣品的靜態(tài)~(27)Al NMR研究了鑭離子對脫鋁Y型沸石(DAIY)骨架硅、鋁和非骨架鋁(EFAL)的影響.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沸石分子篩骨架鋁的遷脫規律STUDIES ON THE MIGRATION OF FRAMEWORK Al OF ZSM 5 SYNTHESIZED BY DIRECT METHOD
- 用X射線(xiàn)衍射、核磁共振、紅外光譜、原子吸收等方法測定了不同脫鋁條件對沸石骨架的影響; 用紅外光譜和正己烷裂解反應考察了不同處理條件對其酸性和催化活性的影響。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經(jīng)脫鋁制得高硅八面沸石,并經(jīng)SiCl_4和(NH_4)_2SiF_6分別改性后的樣品稱(chēng)之為Y(T)和FSY. 采用異丙苯裂化反應比較了它們的活性衰減與結焦之間的關(guān)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-脫附、IR等表征技術(shù)及XRD Rietveld結構精修的方法,通過(guò)清除和交換引入非骨架鋁,探討了USY沸石中非骨架鋁的形態(tài)。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.
- 采用水熱焙燒和向H_2SiF_6-NH_3脫鋁補硅超穩Y沸石體系中添加適量Al_2(SO_4)_3的方法制備出幾種鋁分布均勻的超穩Y沸石分子篩。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,稀土超穩Y沸石中總的非骨架鋁(N_(Al))_EF,隨脫鋁深度的增加而增加,僅只在REUSY-38的~(27)Al MAS NMR譜中觀(guān)察到Al~(a+)非骨架鋁的存在.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.
