Abstract:
PURPOSE: Cephalosporin derivatives, its pharmaceutically acceptable salts and a manufacturing process thereof are provided, which cephalosporin derivatives have improved anti-microbial activity, particularly, for methicillin-resistant Staphylococcus aureus(MRSA) strain, so that they can be useful for antibiotics. CONSTITUTION: The cephalosporin derivatives represented by formula (I), or pharmaceutically acceptable salts thereof are provided, wherein X, Y and Z are the same or different, and independently hydrogen, halogen, C1-6 alkyl, C1-6 alkoxy, C1-6 halogenoalkyl, C1-6 alkoxy alkyl or C3-6 cycloalkyl; R1 is an isoxazol compound in which the 3-site is substituted with a compound of formula (A), wherein Q is a substituent useful for cephalosporin-based compound, and is selected from hydrogen, halogen, hydroxyl, mercapto, cyano, carboxy, carboxylic acid, ester, carbamoyloxy, carbamoyl, N,N-dimethylcarbamoyl, C1-4 alkyl, C1-4 alkyloxy, halogen substituted alkyl, aryl or hetero ring substituent; and R2 is hydrogen, an ester-forming group as an ester of carboxy group, salt-forming atom or carboxy-protecting group. The process for preparing the cephalosporin derivatives represented by formula (I), or pharmaceutically acceptable salts thereof comprises reacting an ilide compound of formula (VI) with an aldehyde compound of formula (VII) in the presence of base and organic solvent at -40 to 25 deg. C.
Abstract:
PURPOSE: A method for recovering gold from gold concentrate by acid thiourea process is provided to leach gold from an acid thiourea aqueous solution environmentally and efficiently by using sulfuric acid as an acidity adjusting agent, thiourea as a leaching agent and air externally injected along with iron ions as an oxidizer. CONSTITUTION: The method comprises the steps of polishing gold concentrate; adding sulfuric acid as an acidity adjusting agent and thiourea as a leaching agent to an aqueous solution containing the polished gold concentrate; and leaching gold from the gold concentrate contained in an acid thiourea aqueous solution using air injected from the outside along with iron ions dissolved from the gold concentrate, wherein the gold concentrate in the polishing step has a grain size corresponding to a sieve size of 400 meshes or less, wherein an ore solution of the gold concentrate has a concentration of 5 to 15 g/L, wherein the sulfuric acid has a concentration of 1 to 3 wt.%, wherein the thiourea has a concentration of 3 to 6 wt.%, wherein the air along with the iron ions dissolved from the gold concentrate is injected into the solution in a flow rate of 100 to 200 ml/min in the leaching step, wherein the leaching step is performed by agitating the solution to an agitation speed of 300 to 400 revolutions per minute, and wherein the leaching step is performed at a reaction temperature of 20 to 30 deg.C for 3 to 4 hours.
Abstract:
PURPOSE: A separation method of high purity zirconium using a column extractor is provided in which high purity zirconium is continuously separated and extracted economically and environment friendly from a zirconium oxychloride (ZrOCl2·8H2O) aqueous solution containing hafnium using the column extractor. CONSTITUTION: The separation method of high purity zirconium using a column extractor comprises first extracting step of extracting zirconium by containing zirconium in an organic solution(2) containing tributyl phosphate (TBP) as a zirconium extractant from the upper part of a first column extractor(10) using difference of specific gravity after repeating mixing and separation of the aqueous solution and the organic solution(2) by supplying a hafnium contained zirconium oxychloride aqueous solution(1) and an organic solution containing tributyl phosphate (TBP) as an extractant to upper and lower parts of the first column extractor(10) respectively; and second extracting step of reverse extracting zirconium by containing zirconium in water from the lower part of the second column extractor using difference of specific gravity after repeating mixing and separation of the organic solution(2) and water by supplying the organic solution(9) extracted in the first extracting step and water to lower and upper parts of a second column extractor respectively.
Abstract:
PURPOSE: A surface modification method of activated carbon for wastewater treatment is provided, which improves adsorption capacity of recalcitrant organic contaminants of industrial wastewater by reducing the surface of activated carbon. CONSTITUTION: The surface modification method of activated carbon comprises the process of reducing activated carbon by directly reacting dithionite ions (S2O4¬2-) produced through electrolysis of sulfurous acid gas with activated carbon, wherein the activated carbon surface modification method is performed by carrying out electrolysis as agitating the activated carbon after injecting activated carbon into the cathode chamber of an electrolytic cell comprising cathode chamber, anode chamber and separation membrane positioned between the cathode chamber and anode chamber and using an aqueous sulfuric acid solution into which sulfurous acid gas is dissolved as a cathode solution and an aqueous sulfuric acid solution as an anode solution, wherein anode plate of the electrolytic cell used for electrolysis is lead or graphite, cathode plate is stainless steel or graphite, and current density is 10 to 200 mA/cm¬2, wherein 0.1 to 2.0 M of sulfuric acid solution saturated with sulfurous acid gas is used as the cathode solution, and wherein the sulfurous acid gas is consistently supplied into the cathode chamber from the outside during the process of performing electrolysis after injecting only the sulfuric acid solution as the cathode solution into the cathode chamber.
Abstract translation:目的:提供用于废水处理的活性炭表面改性方法,通过减少活性炭的表面,提高工业废水的顽固有机污染物的吸附能力。 构成:活性炭的表面改性方法包括通过将亚硫酸气体与活性炭电解直接反应的连二亚硫酸盐离子(S2O4-2-)直接反应来还原活性炭的方法,其中通过进行活性炭表面改性方法 在将活性炭注入到阴极室,阳极室和位于阴极室和阳极室之间的分离膜的电解池的阴极室中,并且使用其中溶解有亚硫酸气体的硫酸水溶液作为搅拌活性炭时进行电解 阴极溶液和硫酸水溶液作为阳极溶液,其中用于电解的电解池的阳极板为铅或石墨,阴极板为不锈钢或石墨,电流密度为10〜200mA / cm 2, 其中用亚硫酸饱和的0.1〜2.0M的硫酸溶液 使用气体作为阴极溶液,并且在仅将硫酸溶液注入阴极溶液作为阴极室之后,在进行电解的过程中,从外部将亚硫酸气体一贯地供给到阴极室。
Abstract:
PURPOSE: A separation method of high purity zirconium using a column extractor is provided in which high purity zirconium is continuously separated and extracted economically and environment friendly from a zirconium oxychloride (ZrOCl2·8H2O) aqueous solution containing hafnium using the column extractor. CONSTITUTION: The separation method of high purity zirconium using a column extractor comprises first extracting step of extracting zirconium by containing zirconium in an organic solution(2) containing tributyl phosphate (TBP) as a zirconium extractant from the upper part of a first column extractor(10) using difference of specific gravity after repeating mixing and separation of the aqueous solution and the organic solution(2) by supplying a hafnium contained zirconium oxychloride aqueous solution(1) and an organic solution containing tributyl phosphate (TBP) as an extractant to upper and lower parts of the first column extractor(10) respectively; and second extracting step of reverse extracting zirconium by containing zirconium in water from the lower part of the second column extractor using difference of specific gravity after repeating mixing and separation of the organic solution(2) and water by supplying the organic solution(9) extracted in the first extracting step and water to lower and upper parts of a second column extractor respectively.
Abstract:
본 발명은 기지 토양의 주원료로서 입도 5mm 이하인 분말 형태의 광물질 점토인 규조토 20 내지 90중량%, 제올라이트 10 내지 50중량% 및 벤토나이트 0 내지 30중량%를 혼합하는 단계, 상기 혼합물에 약 0.1 내지 1.5중량%의 명반 또는 황산알루미늄 등의 수용성 알루미늄 혼합물의 용액을 첨가하여 상토의 pH가 약 3 내지 7이고 수분 함량이 약 15 내지 50%가 되도록 혼합하는 단계, 상기 단계에서 얻은 입자들을 입도 10mm 이하로 조립하여 미립의 광물질 점토를 응집시키는 단계를 포함하는 것을 특징으로 하여, 보습율, 보수율 및 투수성 등의 물리화학적 특성이 향상된 육모용 상토의 제조 방법에 관한 것이다.
Abstract:
first extracting zirconium solution containing hafnium with Versatic acid 10 of 0.5-2.0M in organic solvent, second extracting the organic component with aqueous solution containing HCl of 0.5-2.0M; obtaining ZrOCl28H2O crystal by vaporizing and concentrating an aqueous solution containing Zr; and hydrolyzing ZrOCl28H2O crystal with amnia, and baking.
Abstract:
본명세서는손으로제어장치를직접사용하지않더라도 3D 디스플레이에표시된 3D 오브젝트를제어할수 있는장치및 방법을개시한다. 본명세서에따른 D 오브젝트제어장치는, 무안경 3D 디스플레이장치의화면모서리중 적어도 3곳에위치하는복수의화면마커; 사용자의시선방향과같은촬영방향을가지도록사용자의머리에장착된카메라; 및상기카메라를통해촬영된영상내 화면마커들의위치변화를통해상기무안경 3D 디스플레이장치에표시되는 3D 오브젝트를제어하는제어부;를포함할수 있다.