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    • 4. 发明授权
    • Niobate-based octahedral molecular sieves
    • 铌酸盐基八面体分子筛
    • US06596254B1
    • 2003-07-22
    • US09876903
    • 2001-06-08
    • Tina M. NenoffMay D. Nyman
    • Tina M. NenoffMay D. Nyman
    • C01G3300
    • C01B37/00C01G33/006C01P2002/34C01P2002/77C01P2002/88C01P2006/60
    • Niobate-based octahedral molecular sieves having significant activity for multivalent cations and a method for synthesizing such sieves are disclosed. The sieves have a net negatively charged octahedral framework, comprising niobium, oxygen, and octahedrally coordinated lower valence transition metals. The framework can be charge balanced by the occluded alkali cation from the synthesis method. The alkali cation can be exchanged for other contaminant metal ions. The ion-exchanged niobate-based octahedral molecular sieve can be backexchanged in acidic solutions to yield a solution concentrated in the contaminant metal. Alternatively, the ion-exchanged niobate-based octahedral molecular sieve can be thermally converted to a durable perovskite phase waste form.
    • 公开了对于多价阳离子具有显着活性的铌酸盐基八面体分子筛和合成这种筛子的方法。 筛子具有净负电荷的八面体框架,其包含铌,氧和八面体配位的低价过渡金属。 该框架可以通过合成方法的闭塞碱性阳离子进行电荷平衡。 碱性阳离子可以交换为其他污染金属离子。 离子交换的铌酸盐基八面体分子筛可以在酸性溶液中反向交换,产生浓缩在污染金属中的溶液。 或者,离子交换的铌酸酯基八面体分子筛可以热转化为耐用的钙钛矿相废物形式。
    • 8. 发明授权
    • Synthesis of an un-supported, high-flow ZSM-22 zeolite membrane
    • 合成未支撑的高流动性ZSM-22沸石膜
    • US07119245B1
    • 2006-10-10
    • US10280252
    • 2002-10-25
    • Steven G. ThomaTina M. Nenoff
    • Steven G. ThomaTina M. Nenoff
    • B01J21/00B01J29/00C07C7/00
    • B01J29/7042B01D67/0046B01D67/0051B01D67/0076B01D67/0093B01D71/028B01D2323/08B01D2323/10B01D2323/12B01D2325/10B01J35/065B01J37/0009B01J2229/183C01B39/48C07C5/2708C07C2529/70C07C11/09
    • Novel methods for synthesizing wholly un-supported, high-flow catalytic membranes consisting of 100% crystalline ZSM-22 crystals with no binder phase, having sufficient porosity to allow high Weight Hourly Space Velocities of feedstock to pass through without generating back pressure. The ZSM-22 membranes perform favorably to existing bulk ZSM-22 catalysts (e.g., via 1-butene conversion and selectivity). The method of membrane synthesis, based on Vapor Phase Transport, allows free-standing, binder-less membranes to be fabricated in varied geometries and sizes so that membranes can be tailor-made for particular geometries applications. The ZSM-22 precursor gel may be consolidated into a semi-cohesive body prior to vapor phase crystallization, for example, by uniaxial pressing. These crystalline membranes may be modified by ion exchange, pore ion exchange, framework exchange, synthesis modification techniques to incorporate other elements into the framework, such as K, H, Mg, Zn, V, Ga, and Pt.
    • 用于合成完全不支撑的高流动催化膜的新方法,该膜由100%不含粘结相的ZSM-22晶体组成,具有足够的孔隙率,以允许原料的高重量小时空间速度通过而不产生背压。 ZSM-22膜对现有的体积ZSM-22催化剂(例如通过1-丁烯转化和选择性)有利地起作用。 基于蒸气相运输的膜合成方法允许以不同的几何尺寸和尺寸制造独立的无粘合剂膜,以便可以针对特定几何应用定制膜。 ZSM-22前体凝胶可以在气相结晶之前固化成半凝聚体,例如通过单轴压制。 这些结晶膜可以通过离子交换,孔离子交换,框架交换,合成修饰技术来修饰,以将其它元素掺入框架中,例如K,H,Mg,Zn,V,Ga和Pt。
    • 9. 发明授权
    • Low sintering temperature glass waste forms for sequestering radioactive iodine
    • 低烧结温度玻璃废物形式用于隔离放射性碘
    • US08262950B1
    • 2012-09-11
    • US12727353
    • 2010-03-19
    • Tina M. NenoffJames L. KrumhanslTerry J. GarinoNathan W. Ockwig
    • Tina M. NenoffJames L. KrumhanslTerry J. GarinoNathan W. Ockwig
    • C09K11/04C09K3/00G21F9/00
    • G21F9/305C03C14/004C03C2214/14C03C2214/34C09K11/04
    • Materials and methods of making low-sintering-temperature glass waste forms that sequester radioactive iodine in a strong and durable structure. First, the iodine is captured by an adsorbant, which forms an iodine-loaded material, e.g., AgI, AgI-zeolite, AgI-mordenite, Ag-silica aerogel, ZnI2, CuI, or Bi5O7I. Next, particles of the iodine-loaded material are mixed with powdered frits of low-sintering-temperature glasses (comprising various oxides of Si, B, Bi, Pb, and Zn), and then sintered at a relatively low temperature, ranging from 425° C. to 550° C. The sintering converts the mixed powders into a solid block of a glassy waste form, having low iodine leaching rates. The vitrified glassy waste form can contain as much as 60 wt % AgI. A preferred glass, having a sintering temperature of 500° C. (below the silver iodide sublimation temperature of 500° C.) was identified that contains oxides of boron, bismuth, and zinc, while containing essentially no lead or silicon.
    • 制造低烧结温度玻璃废物的材料和方法形成了强大耐用的结构中的放射性碘。 首先,碘被吸附剂捕获,该吸附剂形成碘负载材料,例如AgI,AgI-沸石,Ag1-丝光沸石,Ag-二氧化硅气凝胶,ZnI 2,CuI或Bi 5 O 7。 接下来,将负载碘的材料的颗粒与低烧结温度玻璃(包括各种Si,B,Bi,Pb和Zn的氧化物)的粉状玻璃料混合,然后在比较低的温度下从425 ℃至550℃。烧结将混合粉末转化为具有低碘浸出速率的玻璃状废物形式的固体块。 玻璃化玻璃废物形式可含有多达60重量%的AgI。 确定了烧结温度为500℃(低于碘化银升华温度为500℃)的玻璃,其含有硼,铋和锌的氧化物,同时基本上不含铅或硅。