Abstract:
PURPOSE: A manufacturing method for a difluoromethane is provided to convert chlorodifluoromethane into difluoromethane with a high yield, and to improve the economical efficiency and effectiveness of reaction. CONSTITUTION: A manufacturing method for a difluoromethane comprises: a step of manufacturing a product mixture by reacting the hydrodechlorination of a chlorodifluoromethane using a reaction mixture comprising chlorodifluoromethane and hydrogen; and a step of dividing the product mixture into a gas material and a liquid material which comprises a supercritical phase. The product mixture is selected from a group which consists of water and an alkaline aqueous solution. The second step is conducted at 100 °C or less. [Reference numerals] (AA) Hydrogen(including methane); (BB) Water(or an alkaline aqueous solution); (CC) Vent gas(hydrogen, methane); (DD) Supercritical hydrodechlorination; (EE) Supercritical phase-liquid phase formation/separation; (FF) Product separation/refinement
Abstract:
본명세서에는 5탄당유래퓨란계화합물및 6탄당유래퓨란계화합물의중합체를제조하기위한신규한촉매및 상기촉매를이용한중합체의제조방법이개시된다. 본발명은상기촉매를사용하여바이오매스유래미활용당을이용함으로써바이오매스전성분의활용도를높일수 있다. 또한, 5탄당유래퓨란계화합물과 6탄당유래퓨란계화합물을함께중합시킴으로써이들의중합반응에의해탄소수 10 이상의고탄소화합물을높은수율로얻을수 있다.
Abstract:
The present invention relates to a Cu/Zn/Al catalyst comprising nanoparticles having a high surface area and a method for producing the catalyst and, more particularly, to a Cu/Zn/Al catalyst comprising nanoparticles having a high surface area and a method for producing the catalyst, wherein the method comprises: a metal precursor solution production step of dissolving copper, zinc and aluminum precursors in an organic solvent to produce a metal precursor solution; a base aqueous solution production step of producing a base aqueous solution; a metal nanoparticle precipitation step of adding the produced base aqueous solution in the produced metal precursor solution, mixing and stirring the base aqueous solution and the metal precursor solution to precipitate metal nanoparticles; and a catalyst production step of collecting, cleaning, drying the precipitated metal nanoparticles, and plasticizing the precipitated metal nanoparticles to obtain a Cu/Zn/Al catalyst. According to the method of the present invention, a Cu/Zn/Al catalyst with superior vitality can be obtained.
Abstract:
본 발명은 벌크 헤테로 접합 무기 박막 태양전지 제조에 관한 것으로서, (1) Cu, In 및 Ga의 전구체 용액에 n형 반도체 나노입자 분산액를 혼합한 후 페이스트 또는 잉크를 제조하여 CIGS-n형 반도체 박막을 얻는 단계를 포함하는 것이 특징이며, 벌크 헤테로 접합을 통해 전자 및 정공의 전극까지의 이동거리를 최소화하여 태양전지 효율을 향상시키고 용액 공정에 의한 프린팅 방법으로 박막을 제조함으로써 박막 태양전지의 제조 비용을 낮출 수 있다.