The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 01, 2010
Filed:
Jun. 30, 2008
Santi Kulprathipanja, Inverness, IL (US);
Stanley J. Frey, Palatine, IL (US);
Richard R Willis, Cary, IL (US);
Lisa M. Knight, Chicago, IL (US);
Santi Kulprathipanja, Inverness, IL (US);
Stanley J. Frey, Palatine, IL (US);
Richard R Willis, Cary, IL (US);
Lisa M. Knight, Chicago, IL (US);
UOP LLC, Des Plaines, IL (US);
Abstract
Adsorbents and methods for the adsorptive separation of meta-xylene from a mixture containing at least one other Caromatic hydrocarbon (e.g., a mixture of ortho-xylene, meta-xylene, para-xylene, and ethylbenzene) are described. Suitable adsorbents comprise sodium zeolite Y having an average crystallite size from about 50 to about 700 nanometers. The adsorbents provide improved separation efficiency, which may be associated with a higher meta-xylene mass transfer rate and/or other beneficial effects. Exemplary desorbents for use in the process may comprise toluene, benzene, or indan.