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    • 3. 发明申请
    • ADSORBENT MATERIAL IMPREGNATED WITH METAL OXIDE COMPONENT
    • 吸附材料用金属氧化物组分浸渍
    • WO2010059488A1
    • 2010-05-27
    • PCT/US2009/064098
    • 2009-11-12
    • R.J. REYNOLDS TOBACCO COMPANYSEARS, Stephen, BensonBANERJEE, Chandra, Kumar
    • SEARS, Stephen, BensonBANERJEE, Chandra, Kumar
    • A24D3/16
    • A24D3/16
    • The invention provides a modified adsorbent material (34) impregnated with a metal oxide, which can be used in a filter element (26) adapted for use in a smoking article. The modified adsorbent material exhibits increased filtration efficiency with respect to certain gas phase species of mainstream cigarette smoke. Exemplary adsorbent materials that can be modified according to the invention include activated carbon, molecular sieves, clays, ion exchange resins, activated aluminas, silica gels, meerschaum, and mixtures thereof. One example of a metal oxide is cerium oxide. Impregnation with a metal oxide can be accomplished by directly treating the adsorbent with a metal oxide or impregnating the adsorbent with a metal oxide precursor, such as cerium nitrate, followed by calcining the impregnated material to convert the precursor to the desired metal oxide. Methods of forming the modified adsorbent material and smoking article filters incorporating the modified adsorbent material are also provided.
    • 本发明提供了浸渍有金属氧化物的改性吸附材料(34),其可用于适用于吸烟制品的过滤元件(26)中。 相对于主流香烟烟雾的某些气相物种,改性吸附材料表现出增加的过滤效率。 可以根据本发明改性的示例性吸附剂材料包括活性炭,分子筛,粘土,离子交换树脂,活性氧化铝,硅胶,海泡石及其混合物。 金属氧化物的一个例子是氧化铈。 用金属氧化物浸渍可以通过用金属氧化物直接处理吸附剂或用金属氧化物前体如硝酸铈浸渍吸附剂,然后煅烧浸渍的材料以将前体转化为所需的金属氧化物来实现。 还提供了形成改性吸附剂材料的方法和掺入改性吸附材料的吸烟制品过滤器。