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:
May. 18, 1999
Filed:
Apr. 20, 1998
Applicant:
Inventor:
James M Hildreth, Wyckoff, NJ (US);
Assignee:
Catalytic Distillation Technologies, Pasadena, TX (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
585258 ; 585264 ; 585269 ; 585804 ; 203D / ;
Abstract
A process for the removal of .alpha.-methyl styrene from admixtures with cumene by hydrogenation in a catalytic distillation hydrogenation to selectively hydrogenate the side chains and produce cumene is disclosed. The crude cumene may be the byproduct of the cumene oxidation to produce phenol. The crude cumene also contains acetone, benzene, ethyl benzene and high and low boiling carbonyls, which are either removed simultaneously with the hydrogenation/distillation or removed first followed by the selective catalytic distillation hydrogenation.