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:
Sep. 12, 2023
Filed:
Dec. 09, 2021
Petroleo Brasileiro S.a.—petrobras, Rio de Janeiro, BR;
Universidade Federal DO Espirito Santo—ufes, Vitoria, BR;
Valdemar Lacerda Junior, Vila Velha, BR;
Eliane Valeria De Barros, Vila Velha, BR;
Alvaro Cunha Neto, Vitoria, BR;
Wanderson Romao, Vitoria, BR;
Cristina Maria Dos Santos Sad, Sera, BR;
Paulo Roberto Filgueiras, Vitoria, BR;
Eustaquio Vinicius Ribeiro De Castro, Vila Velha, BR;
Luiz Silvino Chinelatto Junior, Rio de Janeiro, BR;
Juliana Navarro Bertelli, Vitoria, BR;
Rogerio Mesquita De Carvalho, Rio de Janeiro, BR;
PETROLEO BRASILEIRO S.A.-PETROBRAS, Rio de Janeiro, BR;
UNIVERSIDADE FEDERAL DO ESPIRITO SANTO-UFES, Vitoria, BR;
Abstract
The present invention relates to the field of laboratory-scale sample preparation, which describes a methodology for the specific isolation of tetraprotic naphthenic acids, called ARN acids, from residual naphthenate deposits from petroleum production. The method consists of cleaning the naphthenate deposit, converting the naphthenate salts to naphthenic acids and isolating the ARN acids from the other organic acids, using a silica-based sorbent material with aminopropyl functional groups, previously selected for an efficient elution of different functional groups and polarities.