Abstract:
The invention relates to a palladium catalyst (Pd/C) dipped in carbon that is manufactured by using an ionic liquid and a manufacturing method thereof; and to a hydrogenation reaction of hydrofluorocarbon using the same. More specifically, as a method that dips a palladium particle in the carbon granule using the ionic liquid, after which the same is used in the hydrogenation of the hydrofluorocarbon, the size of the palladium particle is small in comparison with the existing palladium-dipped catalyst, and the shape thereof is uniformly molded so as to present high catalytic activity.
Abstract:
A method is provided to separate and recover pure SO2 only from a gas mixture generated from an IS(Iodine-Sulfur) cycle process even at a high temperature in a stable and succeeding manner through absorption and degassing processes using ionic liquid, and prevent loss of a solvent even in the repeated absorption and degassing processes by maintaining low vapor pressure and high temperature stability as compared with a conventional amine-based absorbent. As a method for separating and recovering sulfur dioxide from a gas mixture containing 40 to 80 wt.% of sulfur dioxide(SO2) and 20 to 60 wt.% of oxygen exhausted from an IS(Iodine-Sulfur) cycle process consisting of a decomposition reaction of sulfuric acid, a decomposition reaction of sulfur dioxide, and a decomposition reaction of iodic acid, a method for separating and recovering pure sulfur dioxide from the gas mixture in the IS cycle process using ionic liquid comprises the steps of: contacting the gas mixture with ionic liquid to allow the ionic liquid to absorb and separate sulfur dioxide(SO2) in the gas mixture in a temperature range of 20 to 50 deg.C; and degassing the sulfur dioxide that has been absorbed and separated from the gas mixture from the ionic liquid in a temperature range of 120 to 250 deg.C. The ionic liquid is ionically bonded compounds in which cations selected from imidazolium, pyrrolidinium, piperidinium, morpholinium and pyridinium are bonded with anions selected from hydrogen sulfate(HOSO3^-), methyl sulfate(CH3OSO3^-), ethyl sulfate(C2H6OSO3^-)methane sulfonate(CH3SO3^-), acetate(CH3COO^-), tetrafluoroborate(BF4^-), hexafluorophosphate(PF6^-), and chloride(Cl^-), or mixtures of the ionically bonded compounds. Further, the recovered sulfur dioxide has a recovery rate of 85 to 95% and purity of 98 to 99%.
Abstract:
Provided is a method for preparing perfluoroalkyl iodide through a vapor phase continuous catalytic process, which is performed under mild conditions to avoid explosion or other dangerous factors, gives a high yield of a desired product, and is amenable to mass production. The method for preparing perfluoroalkyl iodide comprises the step of performing telomerization of tetrafluoroethylene(C2F4) with perfluoroethyl iodide(C2F5I) in the presence of a catalyst. The telomerization is performed through a vapor phase continuous catalytic process in a fixed-bed tube shaped reactor, in which an alumina-supported transition metal catalyst is packed, by introducing tetrafluoroethylene and perfluoroethyl iodide in a vapor phase. The telomerization is performed under ambient pressure at a temperature of 250-450 deg.C.
Abstract translation:提供一种通过气相连续催化方法制备全氟烷基碘的方法,其在温和条件下进行以避免爆炸或其它危险因素,产生高产率的所需产物,并且适于批量生产。 制备全氟烷基碘的方法包括在催化剂存在下,用全氟乙基碘(C 2 F 5 I)进行四氟乙烯(C 2 F 4)调聚的步骤。 通过在气相中引入四氟乙烯和全氟乙基碘的固定床管状反应器中的气相连续催化方法进行调聚,其中填充有氧化铝负载的过渡金属催化剂。 调聚在250-450℃的环境压力下进行。
Abstract:
PURPOSE: A process for preparing hydrofluoroethers is provided to prepare hydrofluoroethers at a high yield while dramatically reducing a double bond product as a by-product by using alkali metal phosphate and halide-based amine salt. CONSTITUTION: A process for preparing hydrofluoroethers is prepared by reacting an alcohol compound and a fluorine-containing olefin compound. The reaction is performed in a condition that alkali metal phosphate and halide-based amine salt are present. The alcohol compound is selected from C1-8 alcohol, perfluorinated phenol containing 1-5 fluorine atoms, and C1-8 fluorinated alcohol containing 1-15 fluorine atoms. The fluorine-containing olefin is selected from C2-4 olefin compound containing 1-8 fluorine atoms.
Abstract:
An economical sulfuric acid decomposition catalyst capable of maintaining excellent reaction activity and stability at high temperatures and high pressures is provided, and a method for decomposing sulfuric acid using the catalyst is provided. A copper-iron binary oxide catalyst comprises a copper oxide and an iron oxide at a copper to iron molar ratio of 1:0.5 to 2.0. The copper oxide and the iron oxide are supported on a support. The copper-iron binary oxide catalyst comprises the support and the copper and iron oxides at a molar ratio of 1:0.1 to 1.0. The support is selected from the group consisting of silica, alumina, zirconia, titania, and mixtures thereof. A method for decomposing sulfuric acid comprises decomposing sulfuric acid in the presence of a copper-iron binary oxide catalyst comprising a copper oxide and an iron oxide at a copper to iron molar ratio of 1:0.5 to 2.0. The decomposition process is conducted at a temperature of 500 to 1200 deg.C and a pressure of 0.1 to 40 atmospheric pressures.
Abstract:
본 발명은 이온성 액체를 이용하여 아나타제형 결정구조를 갖는 이산화티탄과 이의 제조방법 및 이를 이용한 촉매에 관한 것으로서, 더욱 상세하게는 티탄 전구체와 아세트산에, 구조유도체로 이온성 액체를 소량 이용하는 개선된 졸-겔(modified sol-gel)공정은 기존의 티탄 전구체에 아세트산을 단독으로 사용하는 졸-겔(sol-gel)공정에 비해 물성이 우수하며 500 ℃ 이상의 고온에서도 세공부피 및 비표면적의 감소가 적을 뿐만 아니라 촉매 활성에 중요한 아나타제(anatase)상을 유지하기 때문에 촉매 및 지지체로 다양하게 응용될 수 있으며, 특히 수성가스의 전환(water gas shift, WGS)반응에 유용한 담체로서 아나타제형 결정구조를 갖는 이산화티탄과 이의 제조방법 및 이를 이용한 촉매에 관한 것이다.
Abstract:
본 발명은 고 비표면적을 갖는 바륨 설페이트 입자의 제조 방법 및 상기 방법에 따라 제조된 바륨 설페이트 입자를 포함하는 바륨 설페이트 촉매를 이용한 삼산화황의 분해 방법에 관한 것이다. 더욱 상세하게, 본 발명에 따른 바륨 설페이트 입자의 제조 방법은, 바륨 전구체와 황산에 각각 분산제를 혼합하여 각각의 용액을 형성하고, 상기 용액을 서로 혼합한 후, 알콜을 추가로 첨가하고 분무 열분해법을 이용하여 바륨 설페이트 입자를 제조하는 방법이다. 또한, 이러한 제조 방법에 따라 제조된 바륨 설페이트 입자는 고온에서도 내구성이 우수하고 고 비표면적을 가지며, 본 발명에 따른 바륨 설페이트 입자에 백금이 담지된 바륨 설페이트 촉매는, 삼산화황의 분해 반응용 촉매로서 유용하게 이용될 수 있다. 바륨 설페이트, 고 비표면적, 분산제, 분무 열분해법, 황산 분해 반응
Abstract:
A method for manufacturing a metal-alumina granular type particle catalyst is provided to use the metal-alumina granular type particle catalyst in a process for decomposition of sulfur trioxide and to apply the catalyst in a reaction of various flowing layers and a slurry type. A metal-alumina granular type particle catalyst includes metal-alumina. Size of granular type particle catalyst is 0.1 ~ 3 mm. A metal comprises copper, iron, and their mixture. A molar ratio of the metal and the alumina is 0.06 ~ 0.5 or 0.01 ~ 1. The molar ratio of the iron and the alumina is 0.05 ~ 5 or 1 ~ 3. The molar ratio of the iron and the copper is 1 ~ 3. The granular type particle catalyst includes a specific surface area which is 100 m^2/g or more at 900°C or above.
Abstract:
본 발명은 불화 금속계 촉매를 이용한 펜타플루오로에틸 요오다이드(C 2 F 5 I)의 제조방법에 관한 것으로써, 더욱 상세하게는 요오드(I 2 ), 오불화요오드(IF 5 ) 및 테트라플루오로에틸렌(TFE)의 반응 시 반응촉매로 삼불화알루미늄(AlF 3 ), 불화크롬(CrF 3 ) 및 불화마그네슘(MgF 2 )중에서 선택된 특정의 불화 금속계 촉매를 사용하거나, 또는 상기 불화 금속계 촉매에 추가로 안티몬계 촉매가 일정비로 혼합된 복합금속계 촉매를 사용하여 반연속식 공정으로 부생성물인 육불화에탄(C 2 F 6 )의 생성을 억제하면서 고수율로 펜타플루오로에틸 요오다이드(C 2 F 5 I)의 수득이 가능한 불화 금속계 또는 복합금속계 촉매를 이용한 펜타플루오로에틸 요오다이드(C 2 F 5 I)의 제조방법에 관한 것이다. 펜타플루오로에틸 요오다이드, 테트라플로오로에틸렌, 오불화요오드, 요오드, 불화 금속계 촉매, 복합금속계 촉매, 반연속식 공정