Abstract:
본 발명은 탄소수 4 내지 6의 유기산, 유기산 에스테르 또는 유기산과 유기산 에스테르 혼합물을 선택적 수소화 촉매를 사용하여 수소화 반응시켜 촉매의 금속 함량비에 따른 고선택성, 고수율 및 장기간 안정적으로 고리화된 화합물, 구체적으로는 락톤 화합물 및 산소를 포함하는 헤테로고리 화합물을 제조하는 방법에 관한 것이다.
Abstract:
본 발명은 당류의 촉매 수소화에 의해 당알코올류를 제조하기 위한 담지촉매, 이의 제조방법 및 이를 이용하여 당알코올류를 제조하는 방법에 관한 것으로, 보다 상세하게는 실리카, 알루미나 및 티타니아 중에서 선택되는 단독 또는 혼합물 담체, 제올라이트 담체, 또는 니켈금속 산화물로 된 피막을 갖는 실리카, 알루미나 및 티타니아 중에서 선택되는 단독 또는 혼합물 담체에 루테늄 또는 루테늄보론을 담지한 촉매, 이의 제조방법 및 비교적 적은 양의 상기 담지촉매를 재생없이 반복사용하여 당류를 수소화함으로써 그에 상응하는 당알코올류를 고수율로 제조하는 방법에 관한 것이다. 본 발명의 담지 촉매를 사용하면 수소화 반응 중 반복 사용하는 동안 촉매성분의 용해나 비활성화가 없이 고순도의 당알코올류를 제조함으로써 부산물 및 폐기물이 거의 발생하지 않고, 복잡한 분리공정 없이 당알코올류를 제조할 수 있다.
Abstract:
PURPOSE: A catalyst for converting sugar to sugar alcohols by catalytic hydrogenation, a preparation method of the same, and a preparation method of the sugar alcohols using the same are provided to improve the yield of the sugar alcohols by using a ruthenium boron-based catalyst. CONSTITUTION: A catalyst for converting sugar to sugar alcohols carries ruthenium boron in a carrier. The carrier is one or the mixture of silica, alumina, and titania. The content of the ruthenium is in a range between 0.5 and 15weight% based on the total weight of the catalyst. A preparation method of the catalyst includes the following: the selected carrier is treated with the solution of a ruthenium compound, and the treated product is dried at a temperature between 60 and 100 deg C; solid products are obtained and are reduced at a temperature between 10 and 35 deg C by adding an alkaline solution containing potassium borohydride; and the resultant product is filtered and washed to obtain a catalyst carrying ruthenium boron.
Abstract:
PURPOSE: A method for preparing hetero cyclic compound containing a lactone compound and oxygen is provided to ensure high productivity at low pressure. CONSTITUTION: A cyclized compound is prepared by directly reducing organic acid of 4-6 carbon atoms, organic acid ester, or a mixture thereof under the presence of a copper catalyst. The cyclized compound is a hetero cyclic compound containing a lactone compound or oxygen. The organic acid is levulinic acid, succinic acid, fumaric acid, itaconic acid, aspartic acid, adipic acid, or glucaric acid.
Abstract:
A preparation method of tobacco leaves bound with a catalyst support containing a nano-size metal oxide is provided to neutralize or get rid of a specific organic compound that is produced from tobacco combustion. A preparation method of tobacco includes the steps of: preparing a catalyst support by depositing a precious metal oxide or a transit metal oxide in a porous material; mixing the catalyst with a solvent and an inorganic binder to obtain a catalytic solution; spraying and binding the catalytic solution onto a tobacco leaf; and drying the tobacco leaf bound with the catalytic solution at room temperature. Preferably, the catalyst undergoes an ultrasonic treatment to prepare nano-size particles excellent in dispersion. Examples of the inorganic binder include ethanol anhydride, alumina sol, titania sol, silica sol, waterglass, etc.
Abstract:
본 발명은 탄소수 4 내지 6의 유기산, 유기산 에스테르 또는 유기산과 유기산 에스테르 혼합물을 선택적 수소화 촉매를 사용하여 수소화 반응시켜 촉매의 금속 함량비에 따른 고선택성, 고수율 및 장기간 안정적으로 고리화된 화합물, 구체적으로는 락톤 화합물 및 산소를 포함하는 헤테로고리 화합물을 제조하는 방법에 관한 것이다.
Abstract:
PURPOSE: A producing method of furfural is provided to reduce the manufacturing cost of the furfural by decreasing the catalyst loss rate, and by using a tungsten catalyst with chemical stability. CONSTITUTION: A producing method of furfural using xylose or hemicelluloses as a raw material comprises the following steps: converting the raw material into the furfural using a solid acid catalyst deposited with isopolytungstate to a zirconia supporting body in a reacting medium including supercritical fluid; and extracting and separating the furfural by spraying the supercritical fluid into the reacting medium The solid acid catalyst is formed depositing a isopolytungstate precursor to the zirconia supporting body and plasticizing the outcome at 700~1,200 deg C.
Abstract:
PURPOSE: A porous organic-inorganic hybrid, a manufacturing method thereof, an adsorbent comprising the same, and an application thereof are provided to have excellent adsorbing ability at the low relative humid condition by dipping an ionic compound or a polar compound to the porous organic-inorganic hybrid. CONSTITUTION: A manufacturing method of a porous organic-inorganic hybrid comprises the following step. A supplementary inorganic material is dipped to a moist adsorbent which is the porous organic inorganic hybrid in a crystallized form with constant rate or additionally mixed, and dipping inorganic salt with adsorption or hygroscopic ability to the porous organic inorganic hybrid. The supplementary inorganic material is selected from silica, alumina, mesopore, zeolite, boehmite, layer structured compounds, clay, carbon, graphite, graphene, and a combination thereof. The weight ratio of the supplementary inorganic material to the moist adsorbent is 0.1-200 parts by weight based on 100 parts by weight of organic-inorganic hybrid.
Abstract:
PURPOSE: A ruthenium-zeolite-based carrier catalyst for preparing sugar alcohols by the catalytic hydrogenation of sugars, a preparing method of the same, and a method for preparing the sugar alcohols using the same are provided to collect a catalyst carrying ruthenium without a regenerating process and to repeatedly use the catalyst. CONSTITUTION: A preparing method of a carrier catalyst for preparing sugar alcohols includes the following steps: a zeolite carrier is plasticized at a temperature between 200 and 600 deg C for 1 to 15 hours; a solid product is obtained and is treated with a solution of ruthenium compound; the resultant product is dried at a temperature between 20 and 150 deg C; the dried product is reduced with nitrogen gas containing hydrogen at a temperature between 120 and 450 deg C for 1 to 10 hours; and a carrier catalyst carrying ruthenium is obtained.
Abstract:
본 발명은 텅스텐계 촉매를 이용하여 고수율로 퍼퓨랄을 제조하는 방법에 관한 것으로, 구체적으로는 자일로오즈 또는 헤미셀룰로오즈를 원료로 사용하여 퍼퓨랄을 제조하는 방법에 있어서, 초임계 유체를 포함하는 반응 매질 내에서 지르코니아 지지체에 이소폴리텅스테이트(isopolytungstate)를 담지시킨 고체산 촉매체를 이용하여 원료를 퍼퓨랄로 전환시키는 단계(단계 1) 및 상기 반응 매질에 초임계 유체를 분사하여 퍼퓨랄을 추출 및 분리 시키는 단계(단계 2)를 포함하는 고수율로 퍼퓨랄을 제조하는 방법을 제공한다. 본 발명에 따른 퍼퓨랄 제조방법은 열적 안정성과 화학적 안정성이 우수한 텅스텐계 고체산 촉매를 이용하여 퍼퓨랄을 제조하여, 수율이 우수하면서도, 촉매손실율이 적어 퍼퓨랄의 제조단가를 감소시켜 퍼퓨랄 제조에 유용하게 사용할 수 있다. 고체산(solid acid), 초임계 유체(supercritical fluid), 퍼퓨랄(furfural), 지르코니아(zirconia), 이소폴리텅스테이트(isopolytungstate)