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:
Jun. 15, 2004
Filed:
Mar. 14, 2002
Reijo Aksela, Espoo, FI;
Juhani Paloniemi, Kiviniemi, FI;
Kemira Chemicals Oy, Helsinki, FI;
Abstract
A method of hydrogenating alkyl anthraquinones and/or alkyl hydroanthraquinones to alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones is disclosed. The reaction is carried out in the presence of a catalyst under electromagnetic irradiation, such as microwave irradiation. The invention further relates to a method of hydrogenating a working solution in a hydrogen peroxide production process, wherein the working solution contains alkyl anthraquinones and/or alkyl hydroanthraquinones dissolved in at least one solvent to convert the quinines to the corresponding alkyl anthrahydroquinones and/or alkyl hydroanthrahydroquinones, where the reaction is carried out in the presence of a catalyst under electromagnetic irradiation such as microwave irradiation.