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:
Feb. 24, 2015
Filed:
Nov. 22, 2013
Petróleo Brasileiro S.a.—petrobras, Rio de Janeiro, BR;
Int—instituto Nacional DE Tecnologia, Rio de Janeiro, BR;
Marco André Fraga, Rio de Janeiro, BR;
Tatiana Vieira Galvão, Rio de Janeiro, BR;
Simone Maria De Rezende, Rio de Janeiro, BR;
Andrea Maria Duarte De Farias, Rio de Janeiro, BR;
Alexandre Barros Gaspar, Rio de Janeiro, BR;
Marlito Gomes Junior, Petropolis, BR;
Carlos René Klotz Rabello, Rio de Janeiro, BR;
Bernardo Galvão Siqueira, Rio de Janeiro, BR;
Raphael Bezerra De Menezes, Rio de Janeiro, BR;
Petroleo Brasileiro S.A.—Petrobras, Rio de Janeiro, BR;
Int—Instituto Nacional de Tecnologia, Rio de Janeiro, BR;
Abstract
This invention concerns a process for obtaining lactic acid in a single stage by direct oxidation in an aqueous medium of 1,2-propanediol in the presence of a mixture of heterogeneous catalysts, in conditions of low temperature and low pressure. The reaction takes place in the presence of oxygen and a mixture of heterogeneous catalysts, consisting of a first catalyst of noble metal supported in metallic oxide, and a second basic solid catalyst. The mixture of catalysts is easily recovered by filtration at the end of the process, to be reused. The lactic acid is obtained directly, with selectivity between 50% and 97%.