Patent application number | Description | Published |
20100224063 | AMIDIUM-BASED IONIC LIQUIDS FOR CARBON DIOXIDE ABSORPTION - The present invention relates to a carbon dioxide absorbent, an ionic liquid obtained by reacting amide and an organic acid and a method of using the same. The amidium-based ionic liquid of the present invention has excellent CO | 09-09-2010 |
20100326277 | PIPERAZINIUM TRIFLUOROACETATE COMPOUND AND CARBON DIOXIDE ABSORBENT USING THE SAME - The present invention provides a novel piperazinium trifluoroacetate compound prepared by reacting piperazine with trifluoroacetic acid and a carbon dioxide absorbent prepared by dissolving the compound in an ionic liquid or organic solvent. According to the present invention, the carbon dioxide absorbent has excellent carbon dioxide absorption capacity and low solvent loss, and the energy consumption required for the carbon dioxide absorption and desorption is significantly reduced. | 12-30-2010 |
20110092758 | Method of Purifying Olefins Using Pyrrolidinium-Based or Piperidinium-Based Ionic Liquids Comprising Copper (I) Halide - The present invention relates to a method of purifying olefin, the method comprising removing a small amount of acetylenic compounds contained in olefin by using pyrrolidinium-based or piperidinium-based ionic liquid mixtures comprising copper (I) halide. According to the method of the present invention, copper (I) halide is stabilized by pyrrolidinium-based or piperidinium-based ionic liquids, suppressing the oxidation of Cu(I) into Cu(II), whereby the capacity of removing acetylenic compounds can be maintained for a long time and the selective removal rate of acetylenic compounds to olefin can be significantly improved. In addition, since the ionic liquid mixtures comprising copper (I) halide used in the method of the present invention can be applied to both absorption and extraction processes, it can effectively remove acetylenic compounds from olefin in a more simple and economical way compared to the existing adsorption and membrane separation processes. | 04-21-2011 |
20110196139 | PREPARATION METHOD FOR CELLULOSE PHOSPHITE COMPOUNDS - Provided is a method for preparing a cellulose phosphite compound, more particularly a method for preparing a cellulose phosphite compound whereby cellulose is phosphorylated using an ionic liquid comprising an amine-based cation and a phosphite-based anion. | 08-11-2011 |
20120042778 | SULFUR DIOXIDE ABSORBENT COMPRISING IONIC LIQUID - A sulfur dioxide absorbent comprising an ionic liquid comprised of alkyl ether-substituted imidazolium cation and an alkanesulfonate anion moieties possesses a high thermal/chemical stability, high SO | 02-23-2012 |
20120083642 | IONIC LIQUIDS, THE METHOD FOR PREPARING THE SAME AND METHOD FOR REMOVING ACETYLENES FROM OLEFIN MIXTURES USING THE IONIC LIQUIDS - There are provided an ionic liquid having ether group(s) in which a copper(I) compound is included, a method for preparing the same, and a method for removing traces amounts of acetylene-based hydrocarbon compounds included in olefin by absorption or extraction using the same. When the disclosed solution is used, oxidation of Cu(I) to Cu(II) is prevented since CuX is stabilized by the ionic liquid. Thus, selective removal efficiency of acetylenic compounds is improved greatly while the removal performance is retained for a long period of time. Further, since the solution according to the present disclosure is applicable as an extractant as well as an absorbent, the associated operation is simple and apparatus cost can be decreased. | 04-05-2012 |
20130012699 | AMIDIUM-BASED IONIC LIQUIDS FOR CARBON DIOXIDE ABSORPTION - The present invention relates to a carbon dioxide absorbent, an ionic liquid obtained by reacting amide and an organic acid and a method of using the same. The amidium-based ionic liquid of the present invention has excellent CO | 01-10-2013 |
20140294718 | NOVEL SULFUR DIOXIDE AND/OR SULFUR DIOXIDE HYDRATE ABSORBENT - Disclosed is an sorbent for removing sulfur dioxide (SO | 10-02-2014 |
20140296523 | Ionic Liquids, The Method For Preparing The Same And Method For Removing Acetylenes From Olefin Mixtures Using The Ionic Liquids - There are provided an ionic liquid having ether group(s) in which a copper(I) compound is included, a method for preparing the same, and a method for removing traces amounts of acetylene-based hydrocarbon compounds included in olefin by absorption or extraction using the same. When the disclosed solution is used, oxidation of Cu(I) to Cu(II) is prevented since CuX is stabilized by the ionic liquid. Thus, selective removal efficiency of acetylenic compounds is improved greatly while the removal performance is retained for a long period of time. Further, since the solution according to the present disclosure is applicable as an extractant as well as an absorbent, the associated operation is simple and apparatus cost can be decreased. | 10-02-2014 |
20140303399 | METHOD FOR PREPARING ALIPHATIC DIISOCYANATE - The present invention relates to a method for preparing an aliphatic diisocyanate by pyrolyzing an aliphatic dicarbamate in liquid phase, using a tin (II) or (IV) compound as a catalyst and a zwitterionic compound as a stabilizer, thereby remarkably inhibiting high-boiling by-products and providing the aliphatic diisocyanate with high yield. | 10-09-2014 |