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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沸石負載硅鎢酸ultra stable Y zeolite supported silicotungstic acid
- 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
- 沸石負載殼聚糖zeolite loads chitosan
- 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
- 超穩Y分子篩ultrastable Y zeolite
- 選擇Eu(DBM)3phen為客體,有序介孔氧化硅MCM-41和SBA-15為載體,分別在氯仿中進(jìn)行分子組裝,制備出具有較強發(fā)光性能的介孔復合材料Eu(DBM)3phen/APTES-MCM-41(EAM)和Eu(DBM)3phen/APTES-SBA-15(EAS)。Eu(DBM)3phen complexes guests were assembled into the ordered mesoporous silica in chloroform to prepare the luminescent composites Eu(DBM)3phen/APTES-MCM-41 (EAM) and Eu(DBM)3phen/APTES-SBA-15 (EAS).
- 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
- 以Y型沸石前驅體與有機硅氧烷為硅源,通過(guò)共水解-縮聚的方法合成了具有高水熱穩定性的巰基(-SH)和磺酸基(-SO_3H)官能化的MSU型介孔硅基材料。Using zeolite Y seeds and organotrialkoxysilane as silica sources, hydrothermally stable thiol- and sulfonic functionalized mesoporous silicas of MSU structure were prepared by a one-pot synthesis involving co-condensation of organotrialkoxysilane and tetraalkoxysilane and post oxidation.
- 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.
- 本文用NH_3-TPD(氨的程序升溫脫附)和FT-IR研究了三種不同硅鋁比的超穩Y沸石的酸性質(zhì),并以正十六烷為探針?lè )磻芯苛怂鼈兊拇呋阅堋?/a>The acidity of USY with different SIO_2/Al_2O_3 ratios was studied by NH_3-TPD and FT-IR,and the cracking of n-hexadecane was chosed as a probe rea- ction.
