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. 28, 2000
Filed:
Jul. 22, 1998
Applicant:
Inventors:
David Robert Beckett, Hessle, GB;
Russell James Milner, Thorngumbald, GB;
Assignee:
BP Chemicals Limited, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07B / ; C07C / ;
U.S. Cl.
CPC ...
20415821 ; 568366 ;
Abstract
The present invention is a process for reducing the color intensity of discolored isophorone, said process comprising exposing the discolored isophorone to UV radiation suitably having a wavelength in the region of about 370-400 nanometers. The decolorization method is advantageous in that the use of `foreign chemicals` is avoided. Furthermore there are no waste-disposal problems that are encountered with the use of carbon or Fuller's earth.