A crystalline zeolite designated ZSM -12 having the following composition expressed as mole ratios of oxides: 1.0 卤 0.4 M/n OWO20-100 YOZHO where M is at least one cation and n is the valence thereof, W is aluminum or gallium, Y is silicon or germanium, and Z is a value ranging ...
The reactants are brought into contact, preferably in the liquid phase, in the presence of a crystalline zeolite catalyst characterized by a silica to alumina ratio of at least 12 and a constraint index within the approximate range of 1-12. The reaction is conducted at 100° C. to 300°...
常用的分子筛人工合成方法是水热合成法,如ZSM-5(US 3702886),ZSM-11(US 3709979),ZSM-23(US 4076842),ZSM-35(US 4016245),Zeolite beta(US 3308069),SAPO-34(US 4440871),MCM-22(US 4954325)。使用水热法合成沸石分子筛一般是先通过硅源化合物,铝源化合物,碱,模板剂,和水等反应得到初始溶胶,然后该溶胶...
碱脱硅改性的ZSM_12分子筛择形催化合成2_6_二甲基萘的研究
Preparation of zeolite zsm-12 Preparation of zeolite ZSM-12Mae Koenig Rubin
The effects of crystallization time, temperature and aging time on the synthesis of pure ZSM-12 in the presence of polyethylene glycol (PEG) and polyoxyethylene Brij-35 surfactant with fixed ratios of Si/Al (160) and Na/SiO2 (0.144) were systematically investigated. Larger synthesis window and ...
Mesoporous ZSM-12 zeolite was prepared by dual template in-situ method, desilication in alkaline medium and zeolite as silica source method. 本文分别用双模板剂原位合成法、碱脱硅改性法和微孔沸石硅源法合成了具有介孔结构的ZSM-12分子筛,并采用XRD,XRF,N2物理吸附,27Al NMR,29Si NMR,SEM,TEM,TG,...
ZSM-12 (MTW)/ZSM-5 co-crystalline zeolite in 40... PN Joshi,PS Niphadkar,PA Desai,... - 《能源化学》 被引量: 0发表: 2007年 新型10MR和12MR分子筛COK-5的合成,表征及催化应用研究 本文考察了晶化温度,碱金属种类和浓度,模板剂结构及用量等因素对添加晶种静态合成COK-5分子筛的影响.主要结果表明...
Development and Characterization of Mesoporosity for ZSM-12 Zeolite Intracrystalline mass transfer is highly limited in the zeolite framework due to its highly microporous structure. The generation of mesoporosity in 1-dime... X Wei 被引量: 0发表: 2005年 ...
Mesoporous ZSM-12 zeolite was prepared by desilication treatment in alkaline medium. 采用碱脱硅法制备了具有介孔结构的ZSM-12分子筛,并运用X射线衍射、N2吸附-脱附、固体核磁共振和氨程序升温脱附等方法对碱处理前后的ZSM-12分子筛进行了表征,并考察了碱脱硅改性对分子筛的孔结构、酸性以及催化萘的烷基化反...