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. 29, 1977
Filed:
Dec. 19, 1973
Applicant:
Inventor:
John A Hedge, Wilmington, DE (US);
Assignee:
Sun Ventures, Inc., St. Davids, PA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
2606 / ; 2083 / ;
Abstract
Selective adsorption of one cyclic compound from a fluid mixture with a structurally similar cyclic compound can be obtained with molecular sieves (crystalline aluminosilicate zeolites) which have been partially dehydrated at a temperature in the range of 80.degree.-300.degree.C. Preferably the Al/Si ratio in the zeolite framework is in the range of 0.2-0.65. For example, m-xylene can be separated from p-xylene by selective adsorption of the m-xylene on NaY zeolite which was partially dehydrated at 125.degree. C. and contains about 12 wt % water by ignition analysis.