公开(公告)号：US20090326308A1

公开(公告)日：2009-12-31

申请号：US12165329

申请日：2008-06-30

申请人： Santi Kulprathipanja ,  Richard Willis ,  Dorothy Kuechl ,  Jim Priegnitz ,  Jack Hurst ,  Scott Commissaris ,  Linda Cheng

发明人： Santi Kulprathipanja ,  Richard Willis ,  Dorothy Kuechl ,  Jim Priegnitz ,  Jack Hurst ,  Scott Commissaris ,  Linda Cheng

IPC分类号： C07C7/12 ,  B01J20/18

CPC分类号： B01J20/186 ,  B01J20/183 ,  B01J20/28007 ,  B01J2220/42 ,  B82Y30/00 ,  C07C7/12 ,  C07C15/08

摘要： Adsorbents and methods for the adsorptive separation of para-xylene from a mixture containing at least one other C8 aromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable adsorbents comprise nano-size zeolite X having an average crystallite size of less than about 500 nanometers. The adsorbents provide both improved capacity and mass transfer, which is especially advantageous for improving productivity in low temperature, low cycle time adsorptive separation operations in a simulated moving bed mode.

摘要翻译： 描述了从含有至少一种其它C 8芳族烃（例如邻二甲苯，间二甲苯，对二甲苯和乙苯的混合物）的混合物吸附分离对二甲苯的吸附剂和方法。 合适的吸附剂包括平均微晶尺寸小于约500纳米的纳米尺寸沸石X. 吸附剂提供改进的容量和质量传递，这特别有利于在模拟移动床模式中提高低温，低循环时间吸附分离操作的生产率。