Abstract:
PURPOSE: A metal oxide catalyst for etherification reaction is provided to obtain high content of linear polyglycerol using basic binary based metal oxide catalyst for the etherification reaction and to be used for manufacturing polyglyerol suitable for cosmetics and food additives. CONSTITUTION: A binary based metal oxide catalyst for etherification reaction of glycerol is marked as a chemical formula 1. [Chemical formula 1] (CaO)_a · (Ca_12Al_14O_33)_(100-a). In the chemical formula 1, a is weight ratio of CaO to catalyst 100.0, a is in a range of 30-70. A method for manufacturing the metal oxide catalyst comprises the following steps: creating a precipitate of a mixed metal hydroxide by simultaneously adding solution including calcium salt and aluminum salt and alkaline precipitation agent to solution of sodium chloride; mixing the precipitate at 40-80°C; obtaining hydrocalumite metal hydroxide powder through separation and washing of the precipitate; and plasticizing the metal hydroxide powder at 400-800°C.
Abstract:
PURPOSE: A continuous hydrogenation method of unsaturated fatty alkyl ester is provided to ensure mild reaction conditions, excellent reaction stability, and long-period reaction using a nickel-based catalyst. CONSTITUTION: A continuous hydrogenation method of unsaturated fatty alkyl ester comprises a step of preparing saturated fatty acid alkylester by hydrogenating C8-24 unsaturated fatty acid alkylester in the presence of a quaternary metallic oxide catalyst represented by chemical formula 1: (NiO)a·(MgO)b·(ZnO)c·(Al2O3)d. In chemical formula 1, a, b, c and d represent the content based on the total weight of a catalyst, wherein a is 40-80 weight%, b is 1-15 weight%, c is 0.5-5 weight%, and d is 20-50 weight%.
Abstract:
A catalyst for alkylation of phenol and a method for producing o-cresol and 2,6-xylenol using the catalyst are provided to stably produce o-cresol and 2,6-xylenol to a high yield even without frequently performing a reactivating operation of the catalyst. A catalyst for alkylation of phenol is represented by the chemical formula 1, Fe1.0VaM1bM2cSidOx, where M1 denotes one or more components selected from the group consisting of cobalt(Co) and nickel(Ni), M2 denotes one or more components selected from the group consisting of manganese(Mn), molybdenum(Mo), zinc(Zn), and magnesium(Mg), catalyst components of Fe, V, M1, M2, and Si are present in the oxide state, a, b, c, and d denote mole ratios of the components V, M1, M2, and Si based on 1 mole of Fe, a ranges from 0.5 to 2, b rages from 0.01 to 0.5, c rages from 0 to 0.5, d rages from 0.01 to 1.0, and x is determined according to values of the a, b, c and d, and oxide states of the components Fe, V, M1 and M2 based on 1 mole of Fe.
Abstract:
Provided are a method for preparing a fatty acid alkyl ester from animal and vegetable oils easily without post-processing such as washing or distillation, and a transesterification composite catalyst used in the preparation. The method comprises the step of reacting an animal and/or vegetable oil with a low molecular weight alcohol of C1-C4 in the presence of a catalyst represented by xMgOÀyZnOÀZnAl2O4 in a fixed bed reactor to prepare a fatty acid alkyl ester continuously, wherein x and y represent a molar ratio to ZnAl2O4; x is 1-3; y is 0-2; and ZnAl2O4 is a zinc aluminate having a spinel structure. Preferably the animal and/or vegetable oil comprises at least one selected from the group consisting of a soybean oil, a rapeseed oil, a sunflower seed oil, a corn oil, a palm oil, tallow, and their mixture.
Abstract translation:本发明提供一种从动植物油中容易地制备脂肪酸烷基酯而无需洗涤或蒸馏等后处理以及制备中使用的酯交换复合催化剂的方法。 所述方法包括在固定床反应器中在由xMgOÀ yZnOÀ ZnAl 2 O 4表示的催化剂存在下使动物油和/或植物油与C1-C4的低分子量醇反应以连续制备脂肪酸烷基酯的步骤 其中x和y代表与ZnAl 2 O 4的摩尔比; x是1-3; y是0-2; ZnAl2O4是具有尖晶石结构的铝酸锌。 优选地,动物油和/或植物油包含选自大豆油,菜籽油,葵花籽油,玉米油,棕榈油,牛油及其混合物中的至少一种。
Abstract:
본 발명은 실리카겔-흑연 복합체 및 그의 제조방법에 관한 것으로서, 더욱 상세하게는 실리카겔과 흑연이 커플링제에 의하여 화학적으로 결합된 실리카겔-흑연 복합체를 제조하여, 물 흡착량이 큰 실리카겔의 열악한 열전도도 때문에 열효율이 낮은 문제점을 해결함으로써, 상기 실리카겔-흑연 복합체를 흡착식 냉각시스템용의 흡착제로 사용할 경우 실리카겔과 흑연이 화학적으로 결합된 구조적인 특징으로 인하여 강도가 향상되어 흡착제의 내구성이 향상되고, 기존의 기계식 냉각시스템과는 달리 컴프레서와 같은 움직이는 기계부품을 사용하지 않으므로 진동과 소음이 나지 않으며, 물처럼 독성이 없는 물질을 냉매로 사용할 수 있어 환경 친화적이고, 구동 에너지원으로서 전기뿐만 아니라 태양열과 폐열 등 저급 에너지를 활용할 수 있는 장점을 극대화시킨 효과를 얻을 수 있는 실리카겔-흑연 복합체와 그의 제조방법 및 상기한 실리카겔-흑연 복합체를 흡착식 냉각시스템용 흡착제로 사용하는 용도에 관한 것이다. 흡착식 냉각시스템, 실리카겔, 흑연, 복합체, 열전도도, 커플링제
Abstract:
본 발명은 흡착식냉각시스템용 실리카겔/나노카본 복합체형 흡착제의 제조방법에 관한 것으로, 저온의 폐열에 의해 구동되는 흡착식냉각시스템에 일반적으로 사용되는 실리카겔 흡착제의 낮은 열전도도를 개선하기 위하여 열전도도가 매우 우수한 물질인 카본나노튜브 또는 카본나노파이버와 같은 나노카본 입자를 이용한 실리카겔/나노카본 복합체형 흡착제를 개발함으로써 열전도도가 종래 사용되던 흡착제인 실리카겔에 비해 38% 이상 크고 흡착된 물이 80℃ 이하의 낮은 온도에서 실리카겔보다 더 많은 양이 탈착되므로 80℃ 이하 저온의 폐열에 의해 구동되는 흡착식냉각시스템용으로 매우 유용하다. 흡착식냉각, 실리카겔, 카본나노튜브, 카본나노파이버, 복합체, 열전도도, 커플링제, 폐열구동
Abstract:
본 발명은 말레인산에스테르로부터 1,4-부탄디올을 제조하는 방법에 관한 것으로, 하기 화학식 1의 조성을 가진 촉매의 존재 하에서 말레인산에스테르를 수소화시켜 1,4-부탄디올을 제조하는 본 발명에 따른 방법은 저온 조건, 반응물에 대한 수소의 저몰비 조건하에서 고선택율, 고수율 및 고생산성을 나타내며, 촉매의 수시 재활성화 조작을 수행하지 않고도 장기간 안정적으로 1,4-부탄디올을 제조할 수 있다:
CuO(a)MnO 2 (b)M(c)SiO 2 (d)
상기 식에서, a, b, c 및 d는 중량을 기준으로 한 백분율을 나타내며, a는 40 내지 90이고, b는 0.15 내지 5이고, c는 0.001 내지 5이고, d는 5 내지 50이고, M은 아연(Zn), 백금(Pt), 팔라듐(Pd), 레늄(Re), 루테늄(Ru) 및 로듐(Rh) 중에서 선택된 적어도 1종 이상의 금속 원소의 산화물을 나타낸다.
Abstract:
PURPOSE: A process for preparing p-dioxanone from diethyleneglycol is provided, thereby stably preparing p-dioxanone for a long period without reactivation of catalyst with improved selectivity and yield. CONSTITUTION: The process for preparing p-dioxanone from diethyleneglycol comprises dehydrocyclization of diethyleneglycol in the presence of a catalyst represented by the formula(1) of CuO(a)M(b)SiO2(c), in which M is one or more alkali earth metal oxides; and the (a), (b) and (c) represent percentage value based on weight, and are 30 to 85, 0.01 to 5 and 10 to 65, respectively, wherein the catalyst is prepared by (1) adding an alkali precipitating agent into a copper salt solution to produce the hydroxide type of precipitates, (2) adding nano-sized colloidal silica into the solution and maturing them to isolate and clean the precipitates, and (3) mixing the cleaned precipitates with an alkali earth metal compound in water, and drying and post-treating the resulting product.
Abstract:
PURPOSE: A method for preparation of phthalide from phthalic anhydride is provided, thereby preparing phthalide under mild condition, and stably preparing phthalide from phthalic anhydride for a long term. CONSTITUTION: The method for preparation of phthalide from phthalic anhydride comprises hydrogenation of phthalic anhydride in the presence of catalyst of formula (1) of CuO(a)MnO2(b)M(c)SiO2(d) at 180 to 300 deg. C and 1 to 40 atmospheres, wherein a is 40 to 90%, b is 0.15 to 5%, c is 0.001 to 10% and d is 5 to 15%; M is one or more of metal oxides selected from Zn, Pt, Pd, Re, Ru and Rh; and the hydrogen reaction is carried out at 0.05 to 4.0 WHSV(weight hourly space velocity) of phthalic anhydride supplying rate, and a mole ratio of hydrogen and phthalic anhydride of 40-600:1.
Abstract:
PURPOSE: Provided is a process for producing 1,3-alkanediol from a 3-hydroxy ester compound by using a hydrogenation catalyst having high activity and high selectivity. CONSTITUTION: The 1,3-alkanediol is produced by hydrogenating the 3-hydroxy ester compound such as 3-hydroxy methyl propanoate in the presence of the catalyst in a mixed solvent comprising an alcohol solvent and a solvent having a higher boiling point than the 1,3-alkanediol by a liquid-gas phase method, wherein the catalyst is produced by adding an alkali precipitant, such as an alkali carbonate or sodium hydroxide, to a water solution of copper salts to produce particles and then aging by adding colloidal silica. The catalyst has a weight ratio of copper oxide(CuO) and silica(SiO2) being 9:1-5:5.