Abstract:
The present invention relates to a low temperature oxidation catalyst with improved water-stability for removing toxic gas and more specifically, to a low temperature oxidation catalyst for removing toxic gas which is used for the oxidation reaction for directly removing the toxic gas without a preprocessing step at a high temperature by putting water soluble salt of 8B class metal and copper metal used as an active component into a poly(styrene-vinyl benzene) copolymer carrier with moisture. The catalyst of the present invention has extended catalyst lifetime by not generating inactivation even in a condition with the moisture, and also the inactivated catalyst can be recycled after exposing to steam for one or two hours for the large scale processing of the toxic gas.
Abstract:
PURPOSE: A process for ring opening is provided to obtain improved conversion ratio and selectivity in comparison with the case of using hydrogen as a reducing agent. CONSTITUTION: A cyclic hydrocarbon and a reducing agent are provided as supplying materials. The supplying materials are transferred into a reactor (5) and reacted under the presence of a catalyst. A product is separated from the effusion of reaction zone. The catalyst is a heterogeneous catalyst having both acid site and metallic component. The product is obtained by evaporating and heating a mixture containing 100 parts by weight of porous molecular sieve and 0.01-20 parts by weight of water soluble metallic salt. The cyclic hydrocarbon is a naphthene group cyclic hydrocarbon which is pentagonal or hexagonal compound, or an alkyl derivative thereof selected from cyclopentane and cyclohexane. The alkyl derivative is methyl, ethyl, profile, butyl, isopropyl or an isobutyl derivative.
Abstract:
본 발명은 수용성 복합금속 산화물염으로 W, V의 복합금속 산화물염 및 Mo, V의 복합금속 산화물염 중 선택된 어느 하나 이상의 복합금속 산화물염과 과산화수소를 사용하여 고리형 2차 아민으로부터 니트록실 라디칼을 갖는 유도체를 제조하기 위한 신규한 산화용 촉매에 관한 것으로, 본 발명에 따른 산화용 촉매를 사용하는 경우 생성물을 높은 수율 및 순도로 얻을 수 있다.
Abstract:
PURPOSE: A heterogeneous catalyst for preparation of para-benzoquinone and catechol and a preparation method using the same are provided to prepare para-benzoquinone and catechol of 90 weight% or greater based on the weight of a total product from a reaction of phenol and hydrogen peroxide in an organic solvent by using a heterogeneous catalyst. CONSTITUTION: A heterogeneous catalyst for preparation of para-benzoquinone and catechol includes a porous carrier. The porous carrier carries at least one metal ion selected from the group consisting of vanadium and copper. The porous carrier further carries at least one metal ion selected from alkali metals. The vanadium and copper ions are supplied from a nitrate, a sulfate, an acetate, or a halogen salt. A preparation method using the heterogeneous catalyst for preparation of para-benzoquinone and catechol prepares 90 weight% or more of para-benzoquinone and catechol based on the total weight of a product produced from a reaction of phenol and hydrogen peroxide in an organic solvent.
Abstract:
본 발명은 흑연과, 금속 또는 산화금속 혼합물의 밀링 및 산화처리를 통한 핏치 첨가제의 제조 단계, 및 상기 핏치 첨가제를 석유화학 부산물과 함께 반응시키는 단계를 포함하는 핏치의 제조 방법에 관한 것이다. 본 발명은 종래의 기술과는 달리 핏치 제조 시, 흑연 및 금속 혼합물, 또는 흑연 및 산화금속 혼합물을 투여하는 것에 차이가 있으며, 이러한 흑연 및 금속 혼합물 또는 흑연 및 산화금속 혼합물이 핏치 제조 시 촉매로 작용하여, 수율이 향상되며, 아울러 이러한 핏치를 이용한 전지의 전지용량이 향상되게 된다.
Abstract:
본 발명은 임피던스법을 이용한 리튬이차전지의 출력 측정 방법에 관한 것으로서, 더욱 상세하게는 리튬이차전지에 주파수를 변조하면서 교류 전류 및 전압을 인가하여 측정한 임피던스 값과 직류 저항과의 관계를 구하고, 이러한 관계를 이용하여 임피던스 값으로부터 출력을 측정하는 방법에 관한 것이다.
Abstract:
PURPOSE: A solvent extract method of hydroxybenzene and phenol inside an aqueous solution is provided to secure the excellent extraction result when using a solvent including a phosphate group and a ketone group. CONSTITUTION: A solvent extract method of hydroxybenzene and phenol inside an aqueous solution comprises a step of adding triphenyl phosphate, ketone, or trialkyl phosphate with the aqueous solution as an extraction solvent, and centrifugal separating the solution. The aqueous solution contains 0.1~3M of phenol, 0.01~1M of hydro-quinone, 0.01~1M of Catechol, and 0.001~0.1M of benzoquinone.
Abstract:
PURPOSE: A mesoporous carbon producing composition and a producing method of mesoporous carbon using thereof are provided to simply produce the mesoporous carbon, and to economically enlarge the size of pores. CONSTITUTION: A mesoporous carbon producing composition contains the following: 100 parts of solvent by weight mixed with water, alcohol, or their mixture; 1~20 parts of non-ionic surfactant by weight; 1~20 parts of hydrochloric acid by weight; 1~40 parts of pore size controlling material by weight; 5~100 parts of silica precursor b weight; and 1~50 parts of resol by weight as a carbon precursor. The non-ionic surfactant is selected from the group consisting of a fluorine polymer, and a tetraalkyl ammonium system and an ethylene oxide-propylene oxide-ethylene oxide block copolymer.