Patent application number | Description | Published |
20100069230 | HETEROPOLY ACID CATALYST AND METHOD OF PREPARING THE SAME - The present invention relates to a heteropoly acid catalyst which is used for the production of methacrylic acid by gas phase oxidation of methacrolein and a preparing method thereof. The present invention, thereby, provides a novel heteropoly acid catalyst having excellent methacrolein conversion rate, methacrylic acid selectivity and yield. | 03-18-2010 |
20100184591 | METHOD OF PREPARING HETEROPOLY ACID CATALYST - The present invention relates to a method of preparing a heteropoly acid catalyst used for the production of methacrylic acid by gas phase oxidation of methacrolein, more precisely a method of preparing a heteropoly acid catalyst comprising the steps of preparing a slurry by adding metal precursors and ammonium salt to protonic acid Keggin-type heteropoly acid aqueous solution and stirring thereof; and drying, molding and firing the slurry to give a catalyst. The present invention provides a method of preparing a heteropoly acid catalyst exhibiting high methacrolein conversion rate and methacrylic acid selectivity without pre-firing process by using high purity protonic acid Keggin-type heteropoly acid and ammonium salt. | 07-22-2010 |
20140308537 | METHOD FOR FABRICATING HOLLOW METAL NANO PARTICLES AND HOLLOW METAL NANO PARTICLES FABRICATED BY THE METHOD - The present application provides a method for fabricating hollow metal nano particles and hollow metal nano particles fabricated by the same. | 10-16-2014 |
20140342157 | HOLLOW METAL NANO PARTICLES - The present application relates to hollow metal nano particles. | 11-20-2014 |
20150037711 | METHOD FOR FABRICATING CORE-SHELL PARTICLES AND CORE-SHELL PARTICLES FABRICATED BY THE METHOD - The present application provides a method for fabricating core-shell particles, including: forming a first solution by adding a first metal salt and a first surfactant to a first solvent; forming core particles including a first metal included in the first metal salt by adding a first reducing agent to the first solution; forming a second solution by adding the core particles, a second metal salt, and a second surfactant to a second solvent; and forming core-shell particles by adding a second reducing agent to the second solution and forming shells on the surface of the core particle, in which the first surfactant and the second surfactant are polyoxyethylene, polyoxyethylene sorbitan monolaurate or polyoxyethylene oleyl ether, and core-shell particles fabricated by the method. | 02-05-2015 |
20150118496 | METHOD FOR FABRICATING HOLLOW METAL NANO PARTICLES AND HOLLOW METAL NANO PARTICLES FABRICATED BY THE METHOD - The present application provides a method for fabricating hollow metal nano particles and hollow metal nano particles fabricated by the same. | 04-30-2015 |
20150314275 | HOLLOW METAL NANO PARTICLES SUPPORTED ON CARRIER - The present specification relates to hollow metal nano particles supported on a carrier. | 11-05-2015 |
20150328629 | METHOD FOR FABRICATING HOLLOW METAL NANO PARTICLES SUPPORTED ON CARRIER (As Amended) - The present application relates to a method for fabricating hollow nano particles supported on carrier. | 11-19-2015 |
20150333336 | METHOD FOR FABRICATING CORE-SHELL PARTICLES SUPPORTED ON CARRIER AND CORE-SHELL PARTICLES SUPPORTED ON CARRIER FABRICATED BY THE SAME (As Amended) - The present invention provides a method for fabricating core-shell particles supported on a carrier, the method including: forming a solution by adding a first metal supported on a carrier to a solvent; adjusting a pH of the solution from 7 to 14 and adding a metal salt of a second metal thereto; and forming core-shell particles by adding a reducing agent to the solution and forming a shell including the second metal on a surface of a core particle including the first metal, and core-shell particles fabricated by the method. | 11-19-2015 |