Instituto Mexicano Del Petroleo

Jorge Froylan Palomeque Santiago

Rafael Martinez Palou

Diego Javier Guzman Lucero

Natalya Victorovna Likhanova

Javier Guzman Pantoja

The present invention relates to the synthesis of linear aromatic polyimides and the production of membranes for the separation of gases. Specifically, polyimides featuring in their chemical structure, in the part derived from a diamine, 4-fluoro-4',4&#x2033;-diaminotriphenylmethane, and an aromatic dianhydride derived from tetracarboxylic acid. Polyimides are soluble in amidic solvents such as N,N&#x2032;-dimethylformamide, N,N&#x2032;-dimethylacetamide, N-methyl-2-pyrrolidone, etc., which are processed as dense membranes by controlled evaporation of the solvent. The resulting membranes are capable of separating at least a gaseous mixture constituted by two components such as H/CH, He/N, H/CO, O/N, CO/CHand CO/N.

Membranes for gas separation synthesized from polyimides containing 4-fluoro-4',4&#x2033;-diaminotriphenylmethane

This invention is related to the use of ionic liquids of general formula CA, where Crepresents a cation of organic or inorganic type, specifically of the type imidazolium, pyridinium or ammonium salts, while the anion Aare derivatives which are halides, salts of iron (III), aluminum salts (III), acetate and benzoate, though not exclusively. These agents act as ionic liquid extractants of nitrogenous compounds present in hydrocarbon streams through a process of liquid-liquid extraction thereby can be reduced by more than 60% the content of these contaminants in hydrocarbon streams.

Denitrogenation of hydrocarbons by liquid-liquid extraction using ionic liquids

The present invention relates to an improved desulfurization process using an ionic liquid compound of general formula CA, where Crepresents an organic cation such as alkyl-pyridinium, di-alkyl imidazolium and tri-alkyl imidazolium; and Ais an anion of halides of iron (III), such as, for example, FeCl. The desulfurization process is also improved when producing the ionic liquid compound by heating the reactants using microwave energy. The ionic liquids can be used to desulfurize hydrocarbon mixtures by a liquid-liquid extraction.

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Mexico City, Mexico

Jorge Froylan Palomeque Santiago