Abstract:
PURPOSE: A method for producing gamma butyrolactone using a maleic hydride is provided, thereby producing the novel catalyst which has high activity and selectivity can be used as a raw material in producing pyrrolidone. CONSTITUTION: The gamma butyrolactone is produced by mixing maleic anhydride(MAN) and tetrahydrofuran(THF); inserting the mixture into a reactor; reacting the mixture; separating products and catalysts to produce gamma butyrolactone(GBL), in which the catalyst consists of 40 to 70 wt.% of silica, 15 to 40 wt.% of nickel, 1 to 4 wt.% of palladium and 2 to 8 wt.% of molybdenum, wherein the silica has 50 m2/g or more of specific surface area; the reaction temperature is 100 to 275 deg. C; the reaction pressure is 50 to 150 kg/cm2; and the reactor is high pressure batch or continuous reactor.
Abstract:
휘발성석유화합물의 정제시설과 저장시설과 취급시설에서 배출되는 탄화수소류의 총 체적비가 약 15 - 53%인 오염공기를 실리카겔과 활성탄이 충진된 흡착식포집탑에 공급하여서 탄화수소류는 흡착 제거하고 일반적인 배출허용치 0.15 - 10g/m 3 를 만족하는 청정공기만을 대기로 배출하여서 대기환경오염을 방지하며, 흡착식포집탑에 흡착된 탄화수소류를 재생하여 얻어진 탄화수소류를 2탑식 흡착회수장치로 처리하여서 탄화수소류는 응측회수하여 자원 손실을 방지할 수 있는 휘발성 석유화합물의 흡착식포집장치와 2탑식 흡착회수장치 및 그 운전방법.
Abstract:
활성슬럿지를 이용하여 폐수처리를 하는 공정에 있어서 농축산소를 이용하여 산소를 공급하는 하나의 장치 안에서 폭기 및 폐수처리 반응, 그리고 이차침전조의기능을 겸하도록 하는 폐수처리 장치 및 그 운전방법에 관한 것으로 반응기(1)의 상부에 대부분은 침전조의 역할을 하는 침전부분(9)이 있고, 그 중앙부분에는 기체통로(2)를 설치하고 하부에서부터 농축산소(3)을 공급되게 배관하여 유입폐수는 일차침전로(4)를 경유 반응기(1)하부로 공급하고, 슬럿지의 외부순환통로(5) 또는 내부하강원통로(6)를 설치하며 압축기(7)를 기체순환통로에 설치한 것을 특징으로 하는 산소 용해. 반응, 그리고 침전을 겸한 장치를 이용한 활성슬럿지법 폐수처리 장치 및 그 운전 방법.
Abstract:
PURPOSE: An adsorbent for removing sulfur compounds in a C4 hydrocarbon mixture from a fluidized catalytic cracking process and a preparation method thereof are provided to increase the absorption amount of the absorbent. CONSTITUTION: An adsorbent for removing sulfur compounds in a C4 hydrocarbon mixture from a fluidized catalytic cracking process is zeolite having cation substituted with a transition metal. The transition metal is Ag(I) or Cu(I). The zeolite is one selected from a group including zeolite X, zeolite Y, beta-zeolite, and ultrastable Y. The ratio of SiO_2 to Al_2O_3 in the zeolite is in a range between 0.5 and 360. [Reference numerals] (AA) DMDS concentration; (BB) Time; (CC) Example 1; (DD) Example 2; (EE) Example 3
Abstract:
PURPOSE: An oxygen selective absorber and a method for preparing the same are provided to uniformly form a protective film on the surface of barium-contained compound using magnesium oxide. CONSTITUTION: Magnesium alkoxide is dissolved in alcohol in order to obtain magnesium oxide precursor solution. A barium-contained compound is dispersed in the magnesium oxide precursor solution in order to solate the dispersion solution. Distilled water is added to the solated dispersion solution in order to be gelated. The gelated dispersion solution is undergone a drying process and a sintering process.
Abstract:
본 발명은 화석연료 연소 배가스에서 이산화탄소를 분리하는 암모니아수를 이용한 이산화탄소 포집공정에서 이산화탄소가 제거된 배출가스 내에 들어 있는 미량의 암모니아를 효율적으로 제거하는 장치에 관한 것이다. 이러한 본 발명의 암모니아수를 이용한 배가스 이산화탄소 포집 공정에서 배출되는 가스 내의 미량 암모니아를 제거하는 장치는 암모니아수를 이용하여 배기가스로부터 이산화탄소를 선택적으로 흡수하기 위한 흡수탑과 ; 이산화탄소가 흡수된 이산화탄소 함유 암모니아수에서 이산화탄소를 탈기시키기 위한 탈거탑과 ; 상기 흡수탑으로부터 증발된 기체상의 암모니아를 포집하여 암모니아 회수탑으로 보내거나 배출시키는 세정탑과 ; 상기 세정탑과 상기 탈거탑 상단에서 기체상에 들어 있던 증발된 암모니아를 포집한 암모니아수를 가열하여 암모니아 기체와 물로 분리하여 암모니아를 회수하는 암모니아 회수탑과 ; 상기 세정탑에서 포집되지 않고 배출가스로 유출되는 암모니아를 황산과 반응시켜 처리하는 암모니아 회수장치로 구성되고, 상기 암모니아 회수장치는 이산화탄소가 제거된 배가스가 공급되는 관과 ; 상기 관을 통해 공급되는 배가스 내 포함된 암모니아를 황산용액과 반응시켜 황산암모늄이 석출되게 하는 반응기와 ; 상기 반응기에 황산을 공급하는 황산공급수단과 ; 상기 황산공급수단을 통해 공급되는 황산의 농도가 일정하게 유지되게 물을 공급하는 물공급수단을 포함하여 구성됨을 특징으로 한다. 암모니아 회수, 폴리싱, 황산, 이산화탄소, 포집
Abstract:
A method for preparing a silver nitrate-supported adsorbent for olefin/paraffin separation is provided to reduce consumption of silver nitrate that occupies the most price of an adsorbent, thereby lower the price of the adsorbent by treating an aluminosilica gel with a basic solution, thereby removing small pores of the aluminosilica gel that does not take part in the adsorption actually, and a silver nitrate-supported adsorbent for olefin/paraffin separation prepared by the method is provided. As a method for preparing an adsorbent in which silver nitrate(AgNO3) is supported on a pellet type matrix selected from aluminosilica gel, silica gel, and a mixture thereof, a method for preparing a silver nitrate-supported adsorbent for olefin/paraffin separation comprises the steps of: contacting the matrix with a basic solution with a concentration of 0.0125 to 0.0375 M to remove a matrix of micropores with a pore size of 20 Å or less; filtering the matrix in the basic solution, washing the filtered matrix with distilled water, and drying the washed matrix; heating the dried matrix to 300 to 400 deg.C in a nitrogen atmosphere to remove water or other contaminants contained in the matrix; impregnating the matrix that has passed through the heat treatment process in the nitrogen atmosphere with an aqueous silver nitrate solution with a concentration of 0.2 to 1.2 g AgNO3/ml by incipient wetness method, and drying the impregnated matrix in an 100 deg.C air; and heating the dried matrix to a temperature between 100 deg.C and 300 deg.C in an inert gas atmosphere, thereby removing water or impurities contained in silver nitrate during supporting of silver nitrate such that silver nitrate absorbs various olefins well.
Abstract:
A method for producing an adsorbing agent is provided to remove sulfide compound contained in gasoline for transporting or gasoline fuel, selectively, by forming the adsorbing agent of mesoporous silica carrying nickel. A saturated solution is prepared by dissolving nickel nitrate in a solvent, such as water or tetra-hydro-furan. Carriers are impregnated with the saturated solution. The impregnated carriers are dried for 4 hours within an oven of 100°C, and then reduced at a temperature of 300-700°C under a hydrogen ambience. The carriers are mesoporous silica such as MCM-41, MCM-48, SBA-15, or KIT-6. Further, the solvent is tetrahydrofuran.
Abstract:
An olefin/paraffin selective adsorbent is provided to increase an adsorption amount of olefin, obtain a large selectivity(an adsorption amount ratio of olefin to paraffin), improve adsorption and desorption rates, and increase an efficiency of the olefin/paraffin separation process. As an adsorbent for separation of olefin/paraffin, a silver nitrate impregnated aluminosilica gel adsorbent comprises 10 to 44.4% by weight of silver nitrate impregnated in an aluminosilica gel matrix. The silver nitrate is impregnated in the aluminosilica gel matrix in an amount of 39.4 to 41.2% by weight. The silver nitrate impregnated aluminosilica gel adsorbent is used in the separation of rigid olefin/paraffin. The rigid olefin/paraffin is selected from the group consisting of ethylene/ethane, propylene/propane, and butene/butane.