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:
Apr. 14, 1998
Filed:
Mar. 18, 1996
Applicant:
Inventors:
Shiou-Shan Chen, Winchester, MA (US);
Shyh-Yuan Hwang, Cambridge, MA (US);
Slawomir A Oleksy, Billerica, MA (US);
Sanjeev Ram, Hingham, MA (US);
Joseph C Peters, Quincy, MA (US);
Assignee:
Raytheon Engineers & Constructors, Inc., Lexington, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B01J / ; B01J / ; C07C / ;
U.S. Cl.
CPC ...
502 53 ; 502 25 ; 502 55 ; 585440 ; 585441 ; 585444 ;
Abstract
A method and apparatus are disclosed for regenerating and/or stabilizing the activity of a dehydrogenation catalyst used in dehydrogenating an alkylaromatic hydrocarbon to obtain an alkenylaromatic hydrocarbon, the method comprising the steps of continuously or intermittently adding to a reactant stream an effective amount of an alkali metal or alkali metal compound without interrupting the dehydrogenation reaction.