Instituto Mexicano Del Petroleo

Javier Guzman Pantoja

Andrea Rodriguez Hernandez

Diego Javier Guzman Lucero

Jorge Froylan Palomeque Santiago

Candido Aguilar Barrera

Edith Meneses Ruiz

Juan Carlos Gaytan Ramos

Isidoro Garcia Cruz

Jose Antonio Munoz Arroyo

This invention is related to the synthesis of organic carbonates from carbon dioxide and epoxides. It is particularly focused on the production of propylene cyclic carbonate from propylene oxide. The proposed catalytic materials includes a support made of aluminum oxyhydroxide (Catapal B&#xae;), nitric acid, acetic acid and/or phosphoric acid. An important stage is the physical and chemical conditioning of the catalytic materials and to this end, experimental methodologies such as spheronization and thermal treatments were implemented prior the evaluation process.

Catalytic formulation for producing propylene cyclic carbonate from carbon dioxide using a potassium iodide catalyst

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

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Mexico City, Mexico

Javier Guzman Pantoja