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:
May. 30, 1989
Filed:
Mar. 29, 1988
Simon H Hobbs, Chicago, IL (US);
Timothy J Barder, Addison, IL (US);
UOP, Des Plaines, IL (US);
Abstract
A two stage adsorptive separation process for recovering purified 2,6 Dimethylnaphthalene ['2,6 DMN'] from a fresh feed mixture comprising 2,6 DMN and at least one isomer thereof, which process comprises a first stage, employing a first stage adsorbent and desorbent material and operating at 2,6 DMN rejective conditions, with at least a portion of the raffinate product of such stage being fed to a second stage, employing a second stage adsorbent and desorbent material and operating at 2,6 DMN extractive conditions, thereby producing a second stage extract product containing purified 2,6 DMN. The adsorbent(s) and desorbent material(s) used in the process will depend upon the embodiment of the process employed. The most preferred embodiment of the subject invention concerns the use of a distinct adsorbent in each stage and a desorbent material common to both stages.