摘要:
The present invention provides an additive composition having the general formula: A x B y C( 1-y )D z O m wherein: A is one or more metal elements selected from the group consisting of Group IIA of the periodic table; B, C is one or more metal elements selected from the lanthanide group, series of the periodic table or Yttrium; D is one or more metal elements selected from the group consisting of Manganese, Cobalt, Copper, Nickel or Ruthenium; x is a number defined by 0.5
摘要:
Die vorliegende Erfindung betrifft neuartige Katalysatoren für die oxidative Veresterung, mittels derer beispielsweise (Meth)acrolein zu Methyl(meth)acrylat umgesetzt werden kann. Die erfindungsgemäßen Katalysatoren zeichnen sich dabei insbesondere durch eine hohe mechanische und chemische Stabilität auch über sehr lange Zeiträume aus. Dies betrifft insbesondere eine Verbesserung gegenüber Katalysatoren des Standes der Technik, die in Medien mit auch geringem Wassergehalt im kontinuierlichen Betrieb relativ schnell Aktivität und/oder Selektivität verlieren.
摘要:
本发明公开了一种1,3,3,3-四氟丙烯的制备方法,包括:a、通式为CF 3-x Cl x CHClCHF 2-y Cl y 的化合物在复合催化剂的存在下,经n个串联反应器,与氟化氢进行气相氟化反应生成1,2,3-三氯-1,1,3-三氟丙烷、1,2-二氯-1,1,3,3-四氟丙烷,其中化合物通式中x=1,2,3;y=1,2,且3≤x+y≤5;b、1,2,3-三氯-1,1,3-三氟丙烷、1,2-二氯-1,1,3,3-四氟丙烷在脱卤催化剂的存在下,与氢气进行气相脱卤反应生成3-氯-1,3,3-三氟丙烯、1,1,3,3-四氟丙烯;c、3-氯-1,3,3-三氟丙烯、1,1,3,3-四氟丙烯在氟化催化剂的存在下,与氟化氢进行气相氟化反应生成1,3,3,3-四氟丙烯。本发明主要用于制备1,3,3,3-四氟丙烯。
摘要:
Disclosed here are material formulations of use in the conversion of exhaust gases. A catalyst is formed by using a perovskite structure having the general formula ABO3 or a mullite structure having the general formula of AB2O5 where components "A" and "B" may be any suitable non-platinum group metals. Suitable materials may include Yttrium, Lanthanum, Silver, Manganese and formulations thereof.
摘要翻译:这里公开的是用于废气转化的材料配方。 通过使用具有通式ABO 3的钙钛矿结构或具有通式AB 2 O 5的莫来石结构形成催化剂,其中组分“A”和“B”可以是任何合适的非铂族金属。 合适的材料可以包括钇,镧,银,锰及其制剂。
摘要:
A process for producing methyl methacrylate, the process comprising contacting reactants comprising methacrolein, methanol and an oxygen-containing gas, under reaction conditions in the presence of a solid catalyst comprising palladium, bismuth and at least one third element X, where X is selected from the group consisting of P, S, Sc, V, Ga, Se, Y, Nb, Mo, La, Ce, and Nd, wherein the solid catalyst further comprises a support selected from at least one member of the group consisting of silica, alumina, calcium carbonate, active carbon, zinc oxide, titanium oxide and magnesium oxide.
摘要:
A ceria-zirconia-based composite oxide including a composite oxide containing ceria and zirconia, wherein the ceria-zirconia-based composite oxide contains at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in an amount of 0.5 to 5.0 mol% relative to a total amount of the cations contained in the ceria-zirconia-based composite oxide, where the ratio of the content of both cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium in the ceria-zirconia-based composite oxide to the content of zirconium therein ([cerium and the at least one member selected from the group consisting of praseodymium, lanthanum, and yttrium]: [zirconium]) is in the range of 43:57 to 48:52 by mole ratio.
摘要:
The present disclosure refers to a plurality of methods employed for production of ZPGM diesel oxidation catalyst systems substantially free of PGM, which may include a substrate, a washcoat, and an impregnation layer. Washcoat may include at least one carrier material oxides. An optional impregnation layer component, which may include at least one ZPGM catalyst. This catalyst system may be free of any oxygen storage material (OSM). Suitable deposition methods and firing systems may be employed in order to form disclosed ZPGM oxidation catalyst systems, which may be able to remove main pollutants from exhaust of diesel engines, by oxidizing toxic gases.
摘要:
Oxidation ZPGM catalyst systems and three way ZPGM catalyst systems are disclosed. ZPGM catalyst systems may oxidize toxic gases, such as carbon monoxide and hydrocarbons, optionally some ZPGM catalyst systems may as well reduce nitrogen oxides that may be included in exhaust gases. ZPGM catalyst systems may include: a substrate, a washcoat, and an overcoat. The washcoat may include at least one ZPGM catalyst and carrier material oxides. Similarly, overcoat may include at least one ZPGM catalyst, carrier material oxides and OSMs. Suitable known in the art chemical techniques, deposition methods and treatment systems may be employed in order to form the disclosed ZPGM catalyst systems.