Abstract:
본 발명은 비양성자성 극성화합물을 이용하여 5-비닐-2-노보넨을 제조하는 방법에 관한 것으로, 더욱 상세하게는 사이클로펜타디엔과 1,3-부타디엔의 딜즈-알더(Diels-Alder) 반응으로 5-비닐-2-노보넨을 제조하는 반응에 촉매겸 용매로 비양성자성 극성화합물을 사용함으로서, 사이클로펜타디엔의 전환율 향상 및 부산물의 생성을 억제하여 높은 수율로 5-비닐-2-노보넨을 제조하는 방법에 관한 것이다. 사이클로펜타디엔, 1,3-부타디엔, 비양성자성 극성화합물, 5-비닐-2-노보넨
Abstract:
PURPOSE: A direct synthesis of ionic liquid with substituted perfluorinated alkyl group is provided to synthesize a target compound with high yield in a short time and improve process safety. CONSTITUTION: A direct synthesis of ionic liquid with substituted perfluorinated alkyl group of the chemical formula 1 comprises a step of reacting perfluorinated olefin compound of CFR1=CR2R3 and bronsted acid of YH with nitrogen-containing compound in a reaction group. The nitrogen-containing compound is amine compound, pyrrolidine, pyrrole, imidazole, 4,5-dihydrotriazole, triazole, morpholine, piperidine, piperazine, pyridine, pyridazine or triazine. The bronsted acid is HCl, HBr, HI, HBF4, HPF6,(CF3SO)2NH, CF3SO3H, CH3SO3H, HNO2, HNO3, CF3CO2H, or CH3CO2H. The perfluorinated olefin compound is CHF=CH2, CHF=CHF, CF2=CH2, CF2=CHF, CF2=CF2, CHF=CFCF3, CF2=CFCF3, or CF2=CFCF2CF3.
Abstract:
본 발명은 이온성 액체에 용해된 셀룰로오즈 용액에 관한 것으로서, 보다 상세하게 셀룰로오즈와 상호작용을 할 수 있는 관능기가 치환된 양이온 및 음이온으로 구성된 특정의 이온성 액체를 이용하여 셀룰로오즈를 용해시켜 제조된 셀룰로오즈 용액에 관한 것이다. 셀룰로오즈, 이온성 액체, 수소결합, 바이오메스
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:
An extract of Dracocephalum foetidum is provided to show antibacterial activity against bacteria and fungi on the skin surface, bacteria causing food decay and food poisoning, Streptococcus mutans and anti-biotics resistant bacteria, thereby being usefully used as an antibacterial composition for sterilizing the skin surface, preventing the food decay, food poisoning and periodental diseases and as a natural antibacterial agent for a filter of an air cleaning article without side effect. An antibacterial composition comprises a refined oil ingredient of Dracocephalum foetidum, which is obtained by extracting dried Dracocephalum foetidum through distillation to obtain an extract, cooling down the extract and then isolating a refined oil fraction of an upper layer therefrom. The composition is a skin external application composition, a cosmetic composition, or an oral composition. An air cleaning article comprises the extract of Dracocephalum foetidum as an effective ingredient. Further, the composition as a skin external application composition is in a form of solution, spray, patch, pad, cream, ointment and gel.
Abstract:
본 발명은 피롤리디늄계 설폰화된 양쪽성 이온 및 그 제조방법, 이를 이용하여 제조된 리튬염 및 그 제조방법, 그리고 이를 함유하는 전해질 조성물 및 상기 전해질 조성물을 포함하여 구성되는 리튬 이차 전지에 관한 것으로서, 보다 상세하게는 하기 화학식 1로 표시되는 리튬 이차전지 전해질용 피롤리디늄계 설폰화된 양쪽성 이온 및 그 제조방법, 이를 이용하여 제조된 하기 화학식 2로 표시되는 리튬 이차전지 전해질용 리튬염 및 그 제조방법, 그리고 이를 함유하는 리튬 이차전지용 전해질 조성물 및 상기 전해질 조성물을 포함하여 구성되는 리튬 이차 전지에 관한 것이다. 본 발명의 상기 양쪽성 이온은 열적 및 전기화학적으로 안정하므로, 이를 이용하여 제조된 리튬염은 종래의 리튬염 보다 낮은 흡습성을 가지며, 강한 열적 안정성 및 전기화학적 안정성을 나타내며, 이온성 액체와 함께 또는 단독으로 유기용매에 용해하였을 경우 우수한 전도도 및 전기화학적 안정성을 나타내므로, 리튬 이차 전지용 전해질 조성물에 리튬염으로 효과적으로 사용할 수 있다. [화학식 1]
(상기 화학식 1에서, n은 3 또는 4인 정수이고, R은 메틸, 에틸, 프로필, 부틸, 펜틸 또는 헥실임). [화학식 2]
(상기 화학식 2에서, n은 3 또는 4인 정수이고, R은 메틸, 에틸, 프로필, 부틸, 펜틸 또는 헥실이고, X는 트리플레이트, 테트라플루오로보레이트 또는 헥사플루오로포스페이트임). 리튬염, 양쪽성 이온, 리튬 이차 전지, 전해질, 이온성 액체
Abstract:
A method for preparing 5-vinyl-2-norbornene is provided to improve the conversion rate, yield and selectivity of 5-vinyl-2-norbornene and to reduce remarkably the selectivity of 3a,4,7,7a-tetrahydroindene (THI) and an oligomer of by-product. The method comprises the step of reacting cyclopentadiene and 1,3-butadiene in the presence of a catalyst which is a fluoride compound selected from the group consisting of NaF, KF, CsF, MgF2, ZnF2 and NH4F. Preferably the ratio of 1,3-butadiene and cyclopentadiene is 1-5 : 1 by mol; and the reaction is carried out at a temperature of 150-220 deg.C and at a pressure of 200-700 psig in an aromatic hydrocarbon-based solvent for 10-60 min.
Abstract:
Provided is a method for preparing 5-vinyl-2-norbornene to improve conversion rate and yield, to enhance the selectivity of 5-vinyl-2-norbornene and dicyclopentadiene and to reduce the selectivity of 3a,4,7,7a-tetrahydroindene of by-product. The method comprises the step of reacting cyclopentadiene and 1,3-butadiene in the presence of a supported catalyst which comprises a support, and 10-50 wt% of a fluoride compound selected from the group consisting of NaF, KF, CsF, MgF2, ZnF2 and NH4F and supported on the support. Preferably the support is selected from the group consisting of alumina, silica, carbon and magnesium oxide. Preferably the reaction is carried out at a temperature of 150-220 deg.C and in a solvent selected from a hydrocarbon-based compound or an aromatic hydrocarbon compound.
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:
본 발명은 테트라플루오로에틸렌의 이량화 반응용 촉매와 이의 제조방법에 관한 것으로서, 더욱 상세하게는 활성탄 촉매, 또는 활성탄에 루테늄(Ru), Ni(니켈) 및 아연(Zn)으로부터 선택된 전이금속이 담지된 활성탄 담지촉매를 제조하므로써, 테트라플루오로에틸렌(TFE)의 이량화 반응시 탄소침적 및 고분자 생성이 억제되며 전환율을 향상시킬 뿐만 아니라 불소계 고분자 수지산업에서 중요한 단량체인 헥사플루오로프로필렌(HFP)과 반도체 대체 세정제 및 소형 터보 압축기용 냉매로 사용 가능한 옥타플루오로사이클로부탄(RC318)의 선택도 제어가 가능한 테트라플루오로에틸렌의 이량화 반응용 촉매와 이의 제조방법에 관한 것이다. 테트라플루오로에틸렌(TFE), 이량화 반응, 헥사플루오로프로필렌(HFP), 옥타플루오로사이클로부탄(RC318), 활성탄, 전이금속 촉매