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:
Aug. 22, 2000
Filed:
Mar. 19, 1997
Zbigniew Stec, Gliwice, PL;
Jan Zawadiak, Gliwice, PL;
Ulrich Knips, Kamen, DE;
Robert Zellerhoff, Hamminkeln, DE;
Danuta Gilner, Gliwice, PL;
Beata Orlinska, Katowice, PL;
Jerzy Polaczek, Warsaw, PL;
Witold Tecza, Raszyn, PL;
Zofia Machowska, Warsaw, PL;
Rutgers Kureha Solvents GmbH, Duisburg, DE;
Abstract
The process for the production of hydroxy aromatic substances by means of catalytic oxidation of isoalkyl aromatic substance with oxygen, and decomposition of the hydroperoxide thus formed, is based on the concept that isoalkylaromatic substances are emulsified with an aqueous catalyst solution and brought to a temperature ranging from 50.degree. C. up to the boiling temperature of the emulsion; thereupon the oxygen is allowed to act for 2 to 20 hours and the hydroperoxide formed decomposed, in the presence of an inorganic acid as catalyst, into an hydroxyaromatic substance and a ketone.