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:
Oct. 22, 2024
Filed:
Nov. 25, 2020
Petróleo Brasileiro S.a.-petrobras, Rio de Janeiro, BR;
Universidade Federal DO Rio DE Janeiro—ufrj, Rio de Janeiro, BR;
Jailton Ferreira Do Nascimento, Rio de Janeiro, BR;
Cristina Cardoso Pereira, Rio de Janeiro, BR;
Wilson Mantovani Grava, Rio de Janeiro, BR;
Cristiano Piacsek Borges, Rio de Janeiro, BR;
PETRÓLEO BRASILEIRO S.A.—PETROBRAS, Rio de Janeiro, BR;
UNIVERSIDADE FEDERAL DO RIO DE JANEIRO - UFRJ, Rio de Janeiro, BR;
Abstract
The present invention deals with a method for obtaining membranes in the form of hollow fibers with application in the field of carbon dioxide removal from natural gas. The aforementioned membranes are obtained by means of heat treatment of polymeric membranes. In this method, polymeric membranes are obtained by a phase-inversion technique by immersion-precipitation and are subsequently subjected to a heat treatment, that is, that the membranes effectively become precursor membranes of the heat treatment. The heat treatment process involves the optimization of the heating rate, temperature, and stabilization time variables, aiming at the improvement of the transport properties of the polymeric membranes. After the heat treatment, it becomes possible to use the membranes in separation processes of gases which operate at pressures greater than 30 bar, with selectivity for carbon dioxide (CO).