Abstract:
본 발명은 선택산화탈황용 촉매와 이의 제조방법에 관한 것으로, 더욱 상세하게는 특정의 기공 크기, 벽두께, 입자 크기, 및 비표면적을 갖는 중기공성 실리카 분자체에, 전이금속을 일정 함량 비율로 담지시킨 선택산화탈황용 촉매와 추가적으로 상기 실리카 분자체의 표면이 실릴화된 선택산화탈황용 촉매를 제공함으로써, 높은 황화합물 함량을 갖는 석유계 탄화수소에 대한 선택적 산화탈황성능을 최대로 하고, 선택산화탈황 반응의 부산물인 술폰화합물이 촉매의 담체로 침적되는 것을 방지하여 촉매의 수명을 최대로 연장시킨 선택산화탈황용 촉매 및 이의 제조방법에 관한 것이다.
Abstract:
The iodine-free salt suitable for thyroid patients, and a method for preparing the iodine-free salt are provided to make the iodine-free salt having a flower shape, to reduce the solid part insoluble in water and to improve the taste and preference. The iodine-free salt is prepared by adding 1-10 parts by weight of the saturated refined salt aqueous solution containing 2-5 ppb of iodine to 1 part by weight of the bay salt containing 50-300 ppm of iodine, and filtering and washing it to make the bay salt containing 1-10 ppm of iodine; and mixing 1-5 parts by weight of the washed bay salt and 5-9 parts by weight of the refined salt containing 2-5 ppb of iodine in water and crystallizing it by evaporation at 70-100 deg.C.
Abstract:
A catalyst for selective oxidative desulfurization and a manufacturing method thereof are provided to extend a lifetime of the catalyst and to maximize selective oxidation desulphurization capacity about the petroleum hydrocarbon having high sulfide content. A catalyst for selective oxidative desulfurization includes 0.5 ~ 10 weight part of a transition metal dipped in a mesopore silica molecule having 2 ~ 10 nm of pore size, 14 ~ 20 Å of wall thickness, 0.1 ~ 1.0 mum of particle size, and 500 ~ 1400 m^2/g of specific surfacearea. The surface of the catalyst for selective oxidative desulfurization is sylilated by a silylating agent of 0.05 ~ 1.0 molar ratio based on a molar ratio of a silica molecule. The silylating agent is a silane compound selected among C1-20 alkyl silane, C1-20 alkylsilazane, and C1-20 alkoxy silane. The transition metal is a single transition metal or the transition metals more than 2 kinds selected from 4B, 5B, 6B, 7B and 8B family.
Abstract:
A method for manufacturing a silicoaluminophosphate molecular sieve with high performance and stability to manufacture of light olefins and a method for manufacturing the light olefins using the same are provided to increase MTO reactivity efficiency, catalyst life, and a catalyst synthesis yield by optimizing size of a crystal. A method for manufacturing a silicoaluminophosphate catalyst to manufacture of light olefins comprises the following steps of: manufacturing aluminum phosphate gel by mixing water, an alumina precursor, a phosphoric acid; adding an organic template is added in the aluminum phosphate gel; manufacturing synthesized gel by agitating the aluminum phosphate gel and the organic template; dissolving silica after mixing and agitating a DEA organic template and a silica precursor; mixing a silica-dissolved mixture with the synthetic gel; manufacturing SAPO-34 containing the organic template; and the manufacturing the SAPO-34 removed the organic template.
Abstract:
A method for producing tetralone is provided to improve the conversion ratio and selectivity of tetralone by using a heterogeneous catalyst containing transition metals and to maintain the durability and activity of catalyst although the catalyst is reused by a cleaning process. In a method for producing tetralone by performing the oxidation of the liquid portion of tetralin in the presence of a catalyst system and oxidant, the catalytic system is a heterogeneous catalyst containing molecular sieve 99.5~95 mole % and transition metal 0.5~5.0 mole % and the reaction is performed at 20~150 °C for 2~12 hours with a stirring speed of 50~1000 rpm.
Abstract:
본 발명은 몰포리논(morpholinone)기를 함유하는 신규 폴리이소부테닐 숙신산 이미드계 청정 분산제 및 상기 청정 분산제를 함유하는 경유의 청정 분산용 첨가제 패키지(package)에 관한 것이다. 본 발명에 따른 경유의 청정 분산용 첨가제 패키지는, 기존의 청정 분산제 패키지와 비교하여, 경유의 청정 분산성 및 연소성을 향상시켜 경유용 엔진의 연료분사 노즐 막힘의 원인이 되는 연소 생성물 퇴적을 억제하고 배기가스 중 탄화수소, 일산화탄소, 산화질소(NOx), PM 등의 배출이 현저히 감소되는 우수한 효과를 갖는다. 청정 분산제, 몰포리논, 폴리이소부테닐 숙신산 이미드, 연료분사장치, 연소 생성물
Abstract:
본 발명은 리그노셀룰로오즈계 성형활성탄 제조방법에 관한 것으로서, 기존 제조공정보다 단순한 공정으로 고밀도, 고성능 성형활성탄을 제조하는데 목적이 있다. 이를 위하여, 공정의 단순화 및 설비의 간소화를 도모할 수 있고, 특히 활성탄의 기계적 강도 및 흡착능을 향상시킬 수 있으며, 에너지절약 및 환경오염감소에 적극적으로 대처할 수 있도록 한 혼합, 열경화, 분쇄, 성형조제첨가, 응집 공정을 일괄적으로 수행할 수 있는 고전단력믹서를 포함하는 리그노셀룰로오즈계 성형활성탄 제조방법을 제공한다.
Abstract:
PURPOSE: A preparation method of dearomatization catalysts for diesel oil is provided, which can keep high dearomatization activity by using platinum, palladium or their mixtures, mesoporous molecular sieve, pseudo-boehmite and acid solutions. The catalyst also enhances yield of liquid hydrocarbon by inhibiting cracking reaction by using mesoporous molecular sieve, enhances activity by well distributing activating component by utilizing merits of large pore size and pore volume of specific surface of mesoporous molecule sieve, and can prevent inactivation caused by coke deposition. CONSTITUTION: The preparation method of dearomatization catalysts for diesel oil comprises the steps of supporting 100 parts by weight of mesoporous molecular sieve with a SiO2/Al2O3 molecular ratio of 30 to 300 and a pore size of 20 to 50 Å with 0.1 to 2.0 parts by weight of platinum, palladium or their mixtures; adding 5 to 50 parts by weight of pseudo boehmite and 0.2 to 3.0 parts by weight of acid solutions, followed by molding; and calcining the molded matter at 300 to 600 deg.C for 4 to 6 hours.
Abstract translation:目的:提供柴油脱芳构化催化剂的制备方法,通过使用铂,钯或其混合物,介孔分子筛,假勃姆石和酸溶液,可以保持高脱醛活性。 催化剂还通过使用介孔分子筛抑制裂化反应,提高液态烃的产率,通过利用孔隙分子筛比表面积孔径大孔孔体积优良的活性成分,提高活性,可以防止焦炭引起的失活 沉积。 构成:用于柴油的脱芳构化催化剂的制备方法包括以下步骤:将100重量份SiO 2 / Al 2 O 3分子比为30〜300,孔径为20〜50的中孔分子筛与0.1〜2.0份 铂,钯或其混合物的重量; 加入5〜50重量份的假勃姆石和0.2〜3.0重量份的酸溶液,然后成型; 并在300〜600℃下烧成4〜6小时。
Abstract:
PURPOSE: An improved method for preparing mesoporous crystalline molecular sieve having large pore size and superior hydrothermal stability is provided. CONSTITUTION: The method for preparing mesoporous crystalline molecular sieve comprises the steps of a) preparing a first solution by dissolving 2 to 20 weight parts of silica alone or a mixture of silica and a metal salt or metal alkoxide into 100 weight parts of a hydrogen fluoride solution having concentration of 5 to 50%, wherein a mole ratio of Si/metal is 10 or more; b) preparing a second solution by dissolving 2 to 12 weight parts of cationic surfactant into 100 weight parts of distilled water; c) uniformly mixing the solutions by adding the first solution to the second solution in a weight ratio of 1 to 2:1 (second solution/first solution), and preparing powder by filtering and drying the aged solution after aging the resulting solution at a temperature of 25 to 80 deg.C for 10 to 18 hours by adding 20 to 30 weight parts of concentrated aqueous ammonia (based on 100 weight parts of the hydrogen fluoride solution) to the mixed solution; and d) adding the powder to 200 to 300 weight parts (based on 100 weight parts of the hydrogen fluoride solution) of an ethanol acidic solution, and calcining the resulting material at a temperature of 300 to 600 deg.C for 2 to 4 hours.
Abstract:
본 발명은 복합분자체(molecular sieve) 화합물의 제조방법에 관한 것으로서, 더욱 상세하게는 활성탄의 기공내에서 결정성 알루미노실리케이트를 생성시켜 친수 및 친유성 흡착 특성을 동시에 갖고 있어 수처리제, 탈취제, 항균 및 살균제, 유기물 흡착제, 수분 흡착제, 담배필터용 기재, 공기 분리제 등의 폭넓은 용도로 사용되는 복합분자체의 제조방법에 관한 것이다.