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:
Nov. 14, 1989
Filed:
Oct. 22, 1986
Christos Comninellis, Mex, CH;
Robert U Osterwalder, Basel, CH;
Eric Plattner, Seltisberg, CH;
Gottfried Seifert, Magden, CH;
Ciba-Geigy Corporation, Ardsley, NY (US);
Abstract
A process for the preparation of 5-nitro-1,4-naphthoquinones of formula ##STR1## wherein R is hydrogen, a C.sub.1 -C.sub.4 alkyl radical or a C.sub.1 -C.sub.4 alkoxy radical, by oxidation of 1-nitronaphthalene or a suitably substituted 1-nitronaphthalene, which process comprises carrying out the reaction with manganese(III) sulfate as oxidizing agent or a mixture of manganese(III) sulfate and cerium sulfate. The maganese(III) sulfate consumed can be regenerated electrolytically with good current yield. The process is environmentally safe, as the oxidizing agent and the solvent, if any, can be reused.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile