摘要:
An exhaust gas purification catalyst includes a composite oxide support, and a precious metal catalyst supported on the composite oxide support. The composite oxide support includes alumina, zirconia, ceria, a first additive element oxide and a second additive element oxide. The first additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. The second additive element oxide contains an additive element selected from the group consisting of rare earth elements excluding cerium and alkali earth elements. In the composite oxide support, alumina is contained in a range of 30 to 40% by mass and zirconia is contained in a range of 36 to 46% by mass.
摘要:
Processes are disclosed for the conversion of adipic acid to caprolactam employing a chemocatalytic reaction in which an adipic acid substrate is reacted with ammonia and hydrogen, in the presence of particular heterogeneous catalysts and employing unique solvents. The present invention also enables the conversion of other adipic acid substrates, such as mono-esters of adipic acid, di-esters of adipic acid, mono-amides of adipic acid, di-amides of adipic acid, and salts thereof to caprolactam. Solvents useful in the process that do not react with ammonia are also disclosed. Catalyst supports are disclosed which catalyze the reaction of the substrate with ammonia in the absence of added metal. Metals on the catalyst supports comprise ruthenium (Ru), rhodium (Rh), palladium (Pd), osmium (Os), iridium (Ir), and/or platinum (Pt). Heterogeneous catalysts comprising ruthenium (Ru) and rhenium (Re) on titania and/or zirconia supports are also disclosed. Further, disclosed are products produced by such processes, as well as products producible from such products.
摘要:
Disclosed are processes for preparing 1, 6-hexanediol from levoglucosenone. In one embodiment, the process comprises contacting levoglucosenone with hydrogen in the presence of a hydrogenation catalyst comprising palladium, platinum/tungsten, nickel/tungsten, rhodium/rhenium, or mixtures thereof at a first temperature between about 50 °C and 100 °C and at a first reaction pressure between about 50 psi and 2000 psi for a first reaction period, and at a second temperature between about 120 °C and 250 °C and at a second pressure between about 500 psi and 2000 psi for a second reaction period to form a product mixture comprising 1, 6-hexanediol, wherein the first reaction period is the amount of time in which the levoglucosenone has a conversion of at least about 95%.
摘要:
Methods for preparing integral synthesis gas conversion catalyst extrudates including an oxide of a Fischer-Tropsch (FT) metal component and a zeolite component are disclosed. The oxide of the FT metal component is precipitated from a solution into crystallites having a particle size between about 2 nm and about 30 nm. The oxide of the FT metal component is combined with a zeolite powder and a binder material, and the combination is extruded to form integral catalyst extrudates. The oxide of the FT metal component in the resulting catalyst is in the form of reduced crystallites located outside the zeolite channels. No appreciable ion exchange of FT metal occurs within the zeolite channels. The acid site density of the integral catalyst extrudate is at least about 80% of the zeolite acid site density.
摘要:
본 발명은 할로겐족 산성가스가 함유된 과불화 화합물 분해용 촉매 및 이의 제조방법을 제공한다. 본 발명에 의한 과불화 화합물 분해용 Ru-P-Al 삼성분 촉매는 할로겐족 산성가스를 함유하는 과불화 화합물을 분해제거함에 있어 우수한 분해 효과 및 내구성을 나타내므로 반도체 제조 산업에서부터 LCD 공정 현장에 이르기까지 과불화 화합물의 세정제, 에칭제 및 용매 등을 분해하는 목적으로 사용될 수 있고, 또한, F 2 , Cl 2 , Br 2 등과 같은 할로겐족 산성 가스를 사용하는 공정에서 배출되는 과불화 화합물을 분해 제거하는데 유용하게 사용될 수 있다.
摘要:
The present invention discloses a class of organometallic catalysts for both hydrogenation and water oxidation. The synthesis and the use of these catalysts for hydrogenation, hydrogen production and water oxidation reactions is also disclosed.
摘要:
Processes for decreasing elemental mercury in flue gas stream are provided. The processes include receiving the flue gas stream containing elemental mercury in an oxidation zone and maintaining the oxidation zone at a temperature of less than 200C. In the oxidation zone, the flue gas stream is contacted with a Deacon reaction catalyst. As a result, the elemental mercury is oxidized to create oxidized mercury in an oxidized flue gas. The oxidized mercury is then removed from the oxidized flue gas.
摘要:
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.