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:
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:
본 발명은 종래의 산소 선택성 흡착제보다 동일 조업 온도에서도 저진공에서 산소를 탈착시킬 수 있도록, 산소흡착활성원소인 바륨에 Sr 등 이종의 금속을 첨가함으로써 전이 산소 분압을 증가시키고, 높은 열적 안정성 및 우수한 산소 흡착능을 나타내는 Ba x Sr (1-x) Mg y (CO 3 ) (1+y) 입자 또는 Ba x Sr (1-x) CO 3 입자를 포함하는 산소 선택성 흡착제 및 이의 제조방법에 관한 것이다.
Abstract:
본 발명은, 물을 함유하는 과산화수소에서 공비제를 이용하여 물을 제거함으로서 고농도의 과산화수소를 제조하기 위한 공비제를 이용한 과산화수소 농축 방법에 관한 것이다. 본 발명에 따른 공비제를 이용한 과산화수소 농축 방법은, 재비기, 칼럼 및 응축기로 이루어지는 계통 내에 진공을 생성하는 단계; 상기 재비기에 내장되고 물을 함유하는 과산화수소에 열을 가하여 기화시키는 단계; 비점의 차이에 의해 상기 칼럼의 하단에 과산화수소가 응축되고 상기 칼럼의 상단에 물이 응축된 상태에서 상기 물에 공비제를 혼합하여 상기 물과 공비제의 혼합물을 증발시키는 단계; 및 상기 물과 공비제의 혼합물을 상기 응축기에서 응축하여 공비제를 회수하는 단계;를 포함하고, 상기 진공은 상기 물과 공비제의 혼합에 의한 온도에서 공비점에 도달할 수 있는 압력으로 설정된다.
Abstract:
A method and an apparatus for producing carbon dioxide with a high purity by continuously recovering carbon dioxide contained in a mixed gas without loss of ammonia by using ammonia water as an absorbing solution are provided. An apparatus for producing carbon dioxide with a high purity continuously from a mixed gas containing carbon dioxide comprises: a first absorption tower(1) for selectively absorbing carbon dioxide from flue gas using ammonia water; a stripper(3) for stripping carbon dioxide from ammonia water containing carbon dioxide; a first circulation pump(9) for recirculating ammonia water from the stripper; a third absorption tower(6) for absorbing ammonia gas using water when the ammonia gas is contained in the stripped carbon dioxide in a very small amount; a second absorption tower(5) for removing an ammonia that is contained in a flue gas (14) from a top part of the first absorption tower in a very small amount using water, and sending ammonia-containing water to the third absorption tower; a first heat exchanger(2) for performing a heat exchanging operation between carbon dioxide-containing ammonia water from the first absorption tower and recirculated ammonia water from the stripper; a concentration tower(7) for recirculating a very small amount of ammonia-containing water to the second absorption tower while recirculating the concentrated ammonia water to the stripper by concentrating a portion of ammonia water from a bottom part of the stripper; a first reboiler(4) and a second reboiler(8) mounted on bottom parts of the stripper and the concentration tower; a second circulation pump(11) for recirculating a very small amount of ammonia-containing water discharged from the concentration tower to the second absorption tower; and a second heat exchanger(10) for performing a heat exchanging operation between water discharged from the concentration tower and carbon dioxide-containing ammonia water discharged from the first heat exchanger.
Abstract:
A method for separating butene-1 from a mixture gas comprising a C4 olefin and a paraffin, and its apparatus are provided to reduce the loss of butene-1 in case of the removing isobutane and to lower the concentration of n-butane. A method for separating butene-1 from a mixture gas comprising C4 olefins and paraffins comprises the steps of: introducing a mixture gas comprising C4 olefins and paraffins into an adsorption tower to adsorb olefins to separate paraffins; introducing the some part of the obtained C4 olefins of high purity to wash out the adsorbed paraffins of small quantity for improving the purity of olefins; introducing a desorber to desorb C4 olefins; and distilling C4 olefins to obtain butene-1, wherein the absorption, washing and desorption are carried out continuously and repeatedly at three adsorption towers and the three adsorption towers carry out the different processes at the identical point.