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:
Jul. 13, 1993
Filed:
Dec. 02, 1991
Chung-Sung Tan, Hsinchu, TW;
Taiwan Styrene Monomer Corporation, Taipei, TW;
Abstract
A process for separating ethylbenzene and p-xylene from a xylene isomers mixture, additional containing m-xylene and o-xylene, by selective adsorption of ethylbenzene and p-xylene on a silicalite absorbent is disclosed in the present invention, wherein a compressed gaseous CO.sub.2 stream is used as a carrier for carrying a fixed amount of the mixture to the adsorbent bed for the selective adsorption, followed by a supercritical CO.sub.2 stream desorption of the adsorbed ethylbenzene and p-xylene from the adsorbent bed. A method for recycling the CO.sub.2 used therein is also disclosedby, which involves an isothermal and isobaric adsorption of the xylene isomer products from the effluent CO.sub.2 streams.