Patent application number | Description | Published |
20080286196 | Multi-Component Hydrogen Storage Material - A reversible hydrogen storage composition having an empirical formula of: | 11-20-2008 |
20100069234 | GAS ADSORPTION ON METAL-ORGANIC FRAMEWORKS - The present invention involves the use of certain metal organic frameworks that have been treated with water or another metal titrant in the storage of carbon dioxide. The capacity of these frameworks is significantly increased through this treatment. | 03-18-2010 |
20100133188 | Polybenzoxazole Membranes Prepared From Aromatic Polyamide Membranes - The present invention discloses high performance polybenzoxazole membranes prepared from aromatic poly(o-hydroxy amide) membranes by thermal cyclization and a method for using these membranes. The polybenzoxazole membranes were prepared by thermal treating aromatic poly(o-hydroxy amide) membranes in a temperature range of 200° to 550° C. under inert atmosphere. The aromatic poly(o-hydroxy amide) membranes used for making the polybenzoxazole membranes were prepared from aromatic poly(o-hydroxy amide) polymers comprising pendent phenolic hydroxyl groups ortho to the amide nitrogen in the polymer backbone. In some embodiments of the invention, the polybenzoxazole membranes may be subjected to an additional crosslinking step to increase the selectivity of the membranes. These polybenzoxazole membranes showed significantly improved permeability for gas separations compared to the precursor aromatic poly(o-hydroxy amide) membranes and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used in catalysis and fuel cells. | 06-03-2010 |
20100326913 | POLYBENZOXAZOLE MEMBRANES PREPARED FROM AROMATIC POLYAMIDE MEMBRANES - The present invention discloses high performance polybenzoxazole membranes prepared from aromatic poly(o-hydroxy amide) membranes by thermal cyclization and a method for using these membranes. The polybenzoxazole membranes were prepared by thermal treating aromatic poly(o-hydroxy amide) membranes in a temperature range of 200° to 550° C. under inert atmosphere. The aromatic poly(o-hydroxy amide) membranes used for making the polybenzoxazole membranes were prepared from aromatic poly(o-hydroxy amide) polymers comprising pendent phenolic hydroxyl groups ortho to the amide nitrogen in the polymer backbone. In some embodiments of the invention, the polybenzoxazole membranes may be subjected to an additional crosslinking step to increase the selectivity of the membranes. These polybenzoxazole membranes showed significantly improved permeability for gas separations compared to the precursor aromatic poly(o-hydroxy amide) membranes and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used in catalysis and fuel cells. | 12-30-2010 |
20100331437 | POLYBENZOXAZOLE MEMBRANES PREPARED FROM AROMATIC POLYAMIDE MEMBRANES - The present invention discloses high performance polybenzoxazole membranes prepared from aromatic poly(o-hydroxy amide) membranes by thermal cyclization and a method for using these membranes. The polybenzoxazole membranes were prepared by thermal treating aromatic poly(o-hydroxy amide) membranes in a temperature range of 200° to 550° C. under inert atmosphere. The aromatic poly(o-hydroxy amide) membranes used for making the polybenzoxazole membranes were prepared from aromatic poly(o-hydroxy amide) polymers comprising pendent phenolic hydroxyl groups ortho to the amide nitrogen in the polymer backbone. In some embodiments of the invention, the polybenzoxazole membranes may be subjected to an additional crosslinking step to increase the selectivity of the membranes. These polybenzoxazole membranes showed significantly improved permeability for gas separations compared to the precursor aromatic poly(o-hydroxy amide) membranes and are not only suitable for a variety of liquid, gas, and vapor separations, but also can be used in catalysis and fuel cells. | 12-30-2010 |
20110290112 | HIGH PERMEANCE POLYIMIDE MEMBRANES FOR AIR SEPARATION - The present invention discloses a new type of polyimide membranes including hollow fiber and flat sheet membranes with high permeances for air separations and a method of making these membranes. The new polyimide hollow fiber membranes have O | 12-01-2011 |
20110316181 | PROCESS OF MAKING ASYMMETRIC POLYBENZOXAZOLE MEMBRANES - The present invention provides a process for making an integrally skinned asymmetric polybenzoxazole hollow fiber membrane comprising spinning a dope solution via a dry-wet phase inversion technique to form a porous integrally skinned asymmetric o-hydroxy substituted polyimide or an o-hydroxy substituted polyamide hollow fiber membrane comprising microporous inorganic molecular sieve followed by thermal rearrangement at a temperature from about 250° to 500° C. to convert the polyimide or polyamide membrane into a polybenzoxazole membrane. These membranes contain microporous inorganic molecular sieve materials that can have a particle size from about 20 nm to 10 μm. | 12-29-2011 |
20120157743 | MEMBRANE SYSTEM FOR NATURAL GAS UPGRADING - The present invention involves the use of a novel membrane system for natural gas upgrading. This membrane system includes a first-stage membrane such as a membrane prepared from the polymer of intrinsic microporosity (PIM) to selectively remove hydrocarbons from C | 06-21-2012 |
20120322119 | SEPARATION PROCESS USING A POLYIMIDE MEMBRANE - The present invention discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO | 12-20-2012 |
20120322646 | BLEND POLYMER GAS SEPARATION MEMBRANE - The present invention discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO | 12-20-2012 |
20120322911 | POLYIMIDE GAS SEPARATION MEMBRANES - The present invention discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO | 12-20-2012 |
20120323059 | PROCESS OF SEPARATING GASES USING POLYIMIDE MEMBRANES - The present invention discloses a new type of polyimide membrane with high permeances and high selectivities for gas separations and particularly for CO | 12-20-2012 |