Abstract:
PURPOSE: A manganese-based catalyst for modifying the carbon dioxide of methane, a method for preparing the same, and a method for preparing synthetic gas using the same are provided to improve durability, stability, and activity of the catalyst by separately impregnating an active metal containing manganese in a support. CONSTITUTION: A manganese-based catalyst for modifying the carbon dioxide of methane is represented by chemical formula, X-Mn-Y/Z. In chemical formula, the X is platinum, palladium, rhodium, iridium, or ruthenium; the Y is zirconium or lanthanum; and the Z is a support based on silica or alumina. A method for preparing the catalyst includes the following: X components, manganese, and Y components are impregnated in the support; a mixture is obtained; the mixture is dried at a temperature between 50 and 110 degrees Celsius to obtain a dried product; and the dried product is fired at a temperature between 200 and 900 degrees Celsius.
Abstract:
목적 : 감과성할로겐화은사진건유제는사진감도를상승하기위한화학증감공정을실시할때 포그가생기지않는할로겐화은사진용포그억제제및 이를이용한의료용엑스선필름을제공함을목적으로한다. 구성 : 폴리옥시에틸렌계화합물을사진유제제조공정인물리숙성중에첨가하여감광성할로겐화은입자를형성시킨후수세및 화확증감공정을거쳐사진유제를제조하고청색조의폴리에스터필름지지체의양면에도포건조하여의료용엑스선필름을제조한다. 효과 : 감광성할로겐화은사진유제는사진감도를상승하기위한화학증감공정을실시할때 포그(fog) 가없는고감도의사진특성을얻을수있다.
Abstract:
The present invention relates to a method for manufacturing a natural color printing paper. In the method, a flow coupler capable of generating blue, green, and red, a flow infrared absorbent, and a flow oxidizing stabilized agent are dissolved in a solvent of a high boiling point and mixed in a gelatin solution. a surface active agent solution of a saccharos fatty acid diester is added to the gelatin solution and dispersed to form a fine particle. a blue photo emulsion layer, a green photo emulsion layer, an infrared absorbent, and a red photo emulsion layer in the order are coated and dried on a printing paper support member on which a resin or binder is coated to obtain a natural color printing paper.
Abstract:
목적 : 본원은 자외선을 이용하는 저감도 할로겐화은 인쇄제판용 사진감광재료의 제조방법에 관한 것이다. 구성 : 뼈젤라틴 용액과 폴리비닐피롤리돈 혼합용액에 p-톨루엔벤젠설포네이트나트륨염을 넣고 pH 4.6, 온도 45℃에서 싱글 주입법으로 사진유제를 만든후에 염화나트륨, 염화칼륨, 염화리튬 혼합용액과 질산은 용액으로 pH 4.6에서 pAg 8.4를 유지하면서 더블 주입방법에 의해 염화은 입자 분포가 0.1∼0.2㎛이며, 100% 염화은을 갖는 사진유제를 인티할레이션된 폴리에스터 필름 지지체의 일면에 도포건조하여 된 자외선을 이용하는 저감도 할로겐화은 인쇄제판용 사진감광재료를 얻는다. 효과 : 종래의 사진감광재료보다 미세한 입자구조로 형성되어 있기 때문에 사진촬영 현상후 흑화된 도트가 미세하여 고콘트라스트, 고해상력의 사진특성이 있다.
Abstract:
The medical photographic sensitive material is produced by (a) mixing a potassium bromide, a sodium chloride and a potassium iodite with a phenyl carbamoyl gelatin soln., and pouring a silver nitrite soln. and a potassium bromide soln. to the mixt. to make a seed grain photographic emulsion, (b) adding a sodium salt of benzene tiosulfonate to the seed grain emulsion, and double pouring a silver nitrite and a potassium bromide to the mixt. to make a photographic emulsion, and (c) coating the photographic emulsion on the surface of a polyester film or a RC paper.
Abstract:
본 발명은 이산화탄소 개질반응 용 모노리스 촉매 및 이의 제조방법에 관한 것으로, 상세하게는 금속 전구체 용액에 담체를 혼합 및 담지하여, 상기 혼합 및 담지된 용액을 모노리스 지지체에 코팅, 건조시킨 후에 상기 혼합 및 담지된 용액이 코팅된 모노리스 지지체를 소성하는 단계를 포함하는 이산화탄소를 이용한 메탄의 개질반응용 모노리스 촉매의 제조방법을 제공한다. 본 발명에 따른 이산화탄소를 이용한 메탄의 개질반응용 모노리스 촉매 및 이의 제조방법은 이산화탄소와 메탄을 이용하는 개질반응을 수행함에 있어서, 기존의 그래뉼 타입의 성형 촉매에 비해 비교적 장시간 동안 높은 활성을 유지할 수 있어, 안정적인 합성가스의 제조가 가능하다. 또한, 모노리스의 구조적 특징으로 압력 손실이 비교적 적어 높은 유량에서의 반응을 진행시킬 수 있다.
Abstract:
The present invention relates to a preparation method for dimethyl carbonate, which directly uses, without passing through any separation process, a mixture gas of carbon dioxide (CO) and hydrogen (H_2) obtained by a reforming reaction of carbon dioxide (CO_2) and methane (CH_4), both of which are greenhouse gases, for synthesizing methanol; produces dimethyl carbonate with an excess amount of carbon monoxide that is stoichiometrically used for the methanol synthesis during the methanol synthesis process; and separates the remaining carbon monoxide from such juncture so as to provide as a starting material for other applications. [Reference numerals] (AA) Process of supplying carbon dioxide and methane; (BB) Reforming reaction process; (CC) Generating carbon monoxide (CO); (DD) Generating hydrogen (Hz); (EE) Supplying oxygen; (FF) Methanol synthesis process; (GG) Generating an excess amount of carbon monoxide; (HH) Process of separating the carbon monoxide (recovery); (II) Generating dimethyl carbonate (DMC)
Abstract:
PURPOSE: A copper-based catalyst for reforming methane using carbon dioxide and a fabricating method thereof are provided to fabricate synthetic gas with high content of carbon monoxide. CONSTITUTION: A copper-based catalyst for reforming methane using carbon dioxide is represented by chemical formula, a (X)-b (Cu)-c (Y)/Z. In the chemical formula, X is rhodium (Rh) or ruthenium (Ru); Y is manganese (Mn), lanthanum (La), or cerium (Ce); Z, which is a carrier, is silica (SiO2); a, b, and c are respectively the weight% of X, Cu, and Y with respect to Z; and a is 0.1-1.0 weight%, b is 5.0-20.0 weight%, and c is 5.0-20.0 weight%. [Reference numerals] (AA) Conversion rate (%); (BB) Example 3; (CC) CH4 conversion rate (%); (DD) CO2 conversion rate (%); (EE) Time (hr)
Abstract:
본 발명은 메탄의 이산화탄소 개질용 망간계 촉매, 이의 제조방법, 및 이를 이용한 합성가스의 제조방법에 관한 것으로서, 더욱 상세하게는 백금족 원소 및 망간과 함께, 지르코늄과 란타늄 중 1종을 특정비율로 실리카 또는 알루미나 담체에 담지시킨 촉매에 관한 것이며, 또한 상기 촉매의 제조방법 및 상기 촉매를 메탄의 이산화탄소 개질반응에 이용하여 일산화탄소와 수소를 포함하는 합성가스를 제조하는 방법에 관한 것이다. 본 발명의 망간계 촉매는 장시간 반응에서도 탄소 침적현상 억제력이 우수하여 안정성 및 활성이 우수하고, 합성가스 제조공정에 적용시 일산화탄소의 함량이 높은 합성가스를 제조할 수 있으므로, 지구 온난화에 큰 영향을 미치고 있는 이산화탄소를 자원화할 수 있다.
Abstract:
PURPOSE: A tungsten-based catalyst for reforming carbon dioxide using methane, a method for manufacturing the same, and a method for manufacturing synthetic gas containing carbon monooxide and hydrogen using the same are provided to improve the activity and stability of the catalyst at low temperatures. CONSTITUTION: A tungsten-based catalyst for reforming carbon dioxide using methane is represented in chemical formula, X-W-Y/Z. With respect to the chemical formula, X is one or more selected from platinum, palladium, rhodium, iridium, and ruthenium; Y is one or more selected from zirconium and lanthanum; and Z is a carrier and one or more selected from silica and alumina. A method for manufacturing the catalyst includes the following: X and Y are carried in the carrier to obtain a mixture; the mixture is dried at a temperature between 50 and 110 deg. C; and the dried product is plasticized at a temperature between 200 and 900 deg. C.