Abstract:
PURPOSE: Provided are chiral stationary phases which are useful for the separation of two of optical isomers composing racemic compounds, chiral columns filled with the chiral stationary phases and a process for producing the chiral stationary phases. CONSTITUTION: The chiral stationary phase(CSP1) is represented by the formula(1) and manufactured by the steps of: synthesizing an amino acid anilide derivative by dissolving an optically active amino acid derivative then adding an aniline derivative thereto; synthesizing an alkenoyl amino acid anilide derivative by dissolving the amino acid anilide derivative then adding alkenoyl chloride having double bond thereto; synthesizing silyl compound of the alkenoyl amino acid anilide derivative by dissolving the alkenoyl amino acid anilide derivative and adding a silylating agent thereto; and binding the silyl compound of the alkenoyl amino acid anilide derivative to silica gel removed from water by reflux to synthesize CSP1 of the formula(1).
Abstract:
PURPOSE: Provided are chiral stationary phases which are useful for the separation of two of optical isomers composing racemic compounds, chiral columns filled with the chiral stationary phases and a process for producing the chiral stationary phases. CONSTITUTION: The chiral stationary phase(CSP1) is represented by the formula(1) and manufactured by the steps of: synthesizing an amino acid anilide derivative by dissolving an optically active amino acid derivative then adding an aniline derivative thereto; synthesizing an alkenoyl amino acid anilide derivative by dissolving the amino acid anilide derivative then adding alkenoyl chloride having double bond thereto; synthesizing silyl compound of the alkenoyl amino acid anilide derivative by dissolving the alkenoyl amino acid anilide derivative and adding a silylating agent thereto; and binding the silyl compound of the alkenoyl amino acid anilide derivative to silica gel removed from water by reflux to synthesize CSP1 of the formula(1).
Abstract:
PURPOSE: A method is provided to manufacture a nickel-alumina mixing aerogel catalyst by supporting nickel onto alumina aerogel differently from an existing alumina supported nickel catalyst or using sol-gel process. CONSTITUTION: The method for manufacturing an alumina aerogel support for a supported nickel-alumina catalyst comprises a first step of dissolving aluminum alkoxide into a heated alcohol solvent; a second step of forming a transparent sol by performing hydrolysis by adding water, acid and alcohol into the solution prepared in the first step; a third step of forming a gel by adding water contained alcohol into the sol after cooling the sol formed in the second step to an ordinary temperature; a fourth step of aging the gel formed in the third step; a fifth step of supercritical drying the gel aged in the fourth step; and a sixth step of primary heat treating the gel dried in the fifth step in an inert atmosphere, and secondary heat treating the primary heat treated gel in an oxygen atmosphere in an air or oxygen atmosphere.
Abstract:
PURPOSE: A production method of a catalyst of nickel class is provided to remarkably increase a life span as having an excellent reaction activity using a sol-gel method and a supercritical desiccation method. CONSTITUTION: An aerogel mixed with nickel-alumina is produced by the steps of dissolving aluminum alkoxide in alcohol solvent heated, forming a transparent brush by a partial hydrolysis, forming a gel in a room temperature, maturing the gel, drying the gel in a supercritical drying method and treating the gel with heat. In here, the synthetic gas is continuously produced by the steps of filling the catalyst in a reactor using a reactor of flowing upward, inputting hydrogen and nitrogen, pre-treating at 600-800°C of a reaction temperature, stopping supplying hydrogen, adding nitrogen to purge hydrogen, and supplying carbon dioxide and methane material which is reacting material with nitrogen. The catalyst used consists of 1 to 40% of nickel and the rest of alumina.
Abstract:
The alloy catalyst obtained by supporting palladium-ruthenium alloy on the carbon carrier is avaible to liquid-phase reducting aromatic nitro compund. The catalyst is prepared by (1) adding palladium chloride and hydrochloric acidic salt of ruthenium into the solution composed of concentrated hydrochloric acid and distilled water, (2) adding activated carbon and sodium carbonate solution into the mixture, and then procipitating the metal salts on the activated carbon, (3) reducing th metal salts with saturated formaldehyde solution, and (4) washing, filtering, drying and pulverizing the production. The weight ratio of ruthenium to total metal component is below 20 wt.%.
Abstract:
본 발명은 플로로그루시놀 및 푸르푸랄 등의 유기물 출발물질과 이 유기물을 용해시킬 수 있는 유기 용매를 소정의 비율로 혼합하여 솔(sol) 용액을 제조하는 단계; 상기 솔 용액의 pH를 산성 또는 염기성 촉매로 적절히 조절함으로써 대기압, 상온에서 젤을 제조 및 숙성하는 단계; 상기 제조된 젤 내부의 유기 용매를 액체 이산화탄소로 치환하고 초임계 상태에서 건조하여 유기 에어로젤을 제조하는 단계; 및 상기 유기 에어로젤을 비활성 분위기의 전기로 내에서 열분해하여 탄소 에어로젤로 제조하는 단계를 포함하는 탄소 에어로젤 제조방법 및 제조된 탄소 에어로젤을 개시한다. 구체적으로는, pH를 적절히 조절하여 상온에서 짧은 시간 동안 젤을 형성함으로써 기존의 젤 제조 방법에 비해 시간과 에너지를 절약할 수 있고, 별도의 용매 치환 공정 없이 초임계 건조가 가능하므로 공정을 단순화하는 효과가 있으며, 별도의 활성화처리 없이도 고비표면적 및 고축전용량을 가지는 초고용량 커패시터용 탄소 에어로젤을 제조할 수 있는 탄소 에어로젤 제조방법을 개시한다. 솔-젤 법, 초임계 건조법, 초고용량 커패시터, 탄소 에어로젤, 상온 제조
Abstract:
PURPOSE: A catalyst for selective oxidation of carbon monoxide is provided to improve catalyst activation and selectivity and consistently maintain catalyst activation by adding transition element to existing platinum catalyst. CONSTITUTION: The catalyst for selective oxidation of carbon monoxide comprises 0.1 to 5 wt.% of platinum; 0.1 to 10 wt.% of transition element; and a balance of support, wherein the transition element is an element selected from elements of group 7 to group 10 in a periodic table, wherein the transition element is manganese, cobalt or nickel, and wherein the support is one or more metal oxides selected from the group consisting of alumina, silica, titania, zirconia, magnesia, and ceria.
Abstract:
본 발명은 솔-젤법과 초임계 건조법을 이용하여 제조한 알루미나 에어로젤 담체에 니켈을 담지하거나 니켈-알루미나 혼성 에어로젤 촉매를 제조하는 방법에 관한 것으로 본발명에 따라 제조된 니켈-알루미나 촉매는 반응 활성이 우수하고 수명이 현저히 향상되는 효과가 있다.