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:
Jul. 10, 2001
Filed:
Nov. 23, 1999
Applicant:
Inventors:
Jörg Talbiersky, Dorsten, DE;
Edgar Fuhrmann, Castrop-Rauxel, DE;
Wolfgang Brüggemann, Castrop-Rauxel, DE;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 3/768 ;
U.S. Cl.
CPC ...
C07C 3/768 ;
Abstract
A method for removing of metal ions from cresol or from mixtures of aromatic compounds containing cresol is disclosed, wherein the water content in the cresol mixture is adjusted to at least about 0.5 per cent by weight by the addition of water and the water-and-cresol mixture is subsequently passed over an acid ion exchanger. As a result of this process a metal ion content of less than 20 ppb per metal ion is achieved.