US 2025/0186950 A1 · PROCESSES FOR THE PREPARATION OF POLYMERIC MEMBRANES CONTAINING IONIC LIQUIDS AND THEIR DERIVATIVES FOR THE SEQUESTRATION OF CO2 FROM NATURAL GAS BY GASEOUS PERMEATION AND POLYMERIC MEMBRANES OBTAINED BY THESE PROCESSES

Processes for the preparation of polymeric membranes containing ionic liquids and their derivatives for the sequestration of co2 from natural gas by gaseous permeation and polymeric membranes obtained by these processes

AssigneesPetroleo Brasileiro S.A. - Petrobras, Universidade Federal Do Rio De Janeiro - Ufrj

InventorsFREDERICO DE ARAÚJO KRONEMBERGER, FERNANDO GUSMAN BRANDAO, AMANDA LORETI HUPSEL, LEONARDO DOS SANTOS PEREIRA, DARLEY CARRIJO DE MELO, CRISTIANO PIACSEK BORGES, ALBERTO CLAUDIO HABERT

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Abstract

The present invention refers to processes for the preparation of polymeric membranes, which can be nanostructured hybrids, containing ionic liquids and their derivatives for sequestration of CO2 from natural gas by gaseous permeation, and its referred membranes. The membranes of the present invention can be dense flat membranes, or composite asymmetric flat membranes. The invention can be applied in oil and gas extraction and renewable energies, for example, in existing gas treatment plants on off-shore platforms, replacing existing conventional polymeric membranes, as well as in new gas treatment plant designs that use polymeric membranes as natural gas purification technology, or treatment of exhausted gas streams.

Claims18

Dependent claims

A process for the preparation of a flat dense polymeric membrane containing one or more ionic liquids and their derivatives for sequestration of CO2 from natural gas by gaseous permeation, comprising the steps of:

(a) dissolution of a polymer (1a, 1b) in a suitable solvent to form a polymeric solution;
(b) addition of a protic ionic liquid (IL) (1c) based on N-methylethanolamine (NMEA) to the polymeric solution;
and
(c) production of the flat dense polymeric membrane generated from controlled evaporation of the solvent from the polymeric solution in a container made of inert material, and evaluation of the transport properties of the polymer and the effect of the addition of IL.

1 more element

A process for the preparation of a polymeric,

asymmetric flat composite membrane containing one or more ionic liquids and their derivatives for sequestration of CO2 from natural gas by gaseous permeation, comprising the steps of:
(a) dissolution of a polymer (1a, 1b) in a suitable solvent to form a polymeric solution;
(b) addition of a protic ionic liquid (IL) (1c) based on N-methylethanolamine (NMEA)to the polymeric solution;
(c) dissolution of the polymeric solution produced in step (b) to a range between 0.2 and 1% w/w of polymer mass in the solution, and removal of the air dissolved in the solution by ultrasound;
(d) dissolution of a second polymer to form a solution containing the second polymer, followed by spreading the solution containing the second polymer with an extensometer on a glass support and subsequent immersion in a non-solvent bath for polymer precipitation to produce a porous membrane for use as a support for the polymeric solution containing IL;
(e) addition of the polymeric solution obtained in step (c) to a pressurized apparatus capable of generating membranes, followed by pressurization in a range of 20-40 psi on a porous polymeric support to produce the composite membrane, wherein the porous polymeric support can be a commercial membrane or the membrane produced in step (d);
and
(f) coating of one or more selective layers of the composite membrane with a solution of a super permeable silicone elastomeric polymer in order to cover any defects and promote the protection of the composite membrane for manipulation.

5 more elements

Dependencies are inferred from the claim text.