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:
Mar. 23, 2010
Filed:
Aug. 20, 2007
John Di-yi Ou, Houston, TX (US);
Sebastian C. Reyes, Branchburg, NJ (US);
Bal K. Kaul, Fairfax, VA (US);
Wenyih Frank Lai, Bridgewater, NJ (US);
Brenda A. Raich, Annandale, NJ (US);
Charanjit S. Paur, Roselle Park, NJ (US);
John Di-Yi Ou, Houston, TX (US);
Sebastian C. Reyes, Branchburg, NJ (US);
Bal K. Kaul, Fairfax, VA (US);
Wenyih Frank Lai, Bridgewater, NJ (US);
Brenda A. Raich, Annandale, NJ (US);
Charanjit S. Paur, Roselle Park, NJ (US);
ExxonMobil Chemical Patents Inc., Houston, TX (US);
Abstract
In a process for producing a para-xylene enriched product from a gaseous mixture comprising at least para-xylene, meta-xylene and ortho-xylene, the gaseous mixture is contacted with an adsorbent capable of selectively adsorbing para-xylene and comprising a crystalline molecular sieve having an average crystal size between about 0.5 micron and about 20 microns. The contacting is conducted at a temperature and pressure such that at least part of the para-xylene in the mixture is adsorbed by the adsorbent to produce a para-xylene-depleted effluent stream. The para-xylene is then desorbed from said adsorbent and collected to form a para-xylene enriched stream. The adsorption and desorption steps are repeated for a plurality of cycles, such that the time between successive contacting steps is no more than 10 seconds.