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:
Feb. 23, 1999
Filed:
Aug. 20, 1996
Applicant:
Inventors:
William D McGhee, St. Louis, MO (US);
Patrick P Notte, Cantonment, FL (US);
Assignee:
Solutia Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
568800 ; 502 34 ; 502 35 ; 502 71 ; 568705 ; 568714 ; 568715 ; 568716 ; 568724 ;
Abstract
A zeolite catalyst for hydroxylating benzene to phenol is treated hydrothermally with a gas comprising approximately 1-100 mole percent water at a temperature between approximately 350.degree.-950.degree. C., and subsequently is treated with an acid. This treatment selectively removes aluminum species from the zeolite catalyst in a manner that increases catalyst stability in phenol production without reducing the activity of the catalyst.