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. 31, 2026
Filed:
Dec. 13, 2021
Dsm Ip Assets B.v., Heerlen, NL;
Universität Basel, Basel, CH;
Werner Bonrath, Kaiseraugst, CH;
Thomas Buchholz, Kaiseraugst, CH;
Thomas Netscher, Kaiseraugst, CH;
Jan Schuetz, Kaiseraugst, CH;
Christof Sparr, Kaiseraugst, CH;
DSM IP ASSETS B.V., Maastricht, NL;
UNIVERSITÄT BASEL, Basel, CH;
Abstract
The present invention relates to the photooxidation of 2,4,6-trimethyl-phenol to yield 4-hydroperoxy-2,4,6-trimethylcyclohexa-2,5-dien-1-one using methylene blue as photosensitizer in a solvent mixture of water and alcohols using light of the high wavelength range of the visible spectrum. This process allows 5 obtaining 4-hydroxy-2,4,6-trimethylcyclohexa-2,5-dien-1-one and 2,3,5-trimethyl-hydroquinone in high yields and selectivity from 2,4,6-trimethylphenol.