Abstract:
The present invention relates to the preparation of various types of natural zeolite catalysts from natural zeolites such as clinoptilolite and the method of producing dimethyl ether from methyl alcohol using these natural zeolite catalysts.
Abstract:
A process for the catalytic alkylation of an olefin with an isoparaffin is described in which a feed comprising at least one olefin and at least one isoparaffin is contacted with a solid acid catalyst under alkylation conditions effective for reaction between the olefin and the isoparaffin to produce an alkylated product. The the solid acid catalyst comprises a crystalline microporous material of the MWW framework type, the feed comprises at least one C5 + olefin and/or at least one C5 + isoparaffin and the alkylated product comprises at least 20% wt% of C10 + branched paraffins.
Abstract:
Catalysts including at least one microporous material (e.g., zeolite), an organosilica material binder, and at least one catalyst metal are provided herein. Methods of making the catalysts, preferably without surfactants and processes of the catalysts, e.g., for aromatic hydrogenation, are also provided herein.
Abstract:
Die Erfindung betrifft ein Verfahren zur Ausbildung einer Alumosilikat-Zeolith-Schicht auf einem aluminiumhaltigen metallischen Substrat aus metallischem Aluminium oder einer Aluminiumlegierung, das in eine alkalisch eingestellte wässrige Reaktionsdispersion eingebracht wird, in der als netzwerkbildende Elemente Silizium und gegebenenfalls Aluminium enthalten sind, wobei unabhängig davon, ob Aluminium in der wässrigen Reaktionsdispersion vorliegt oder nicht, das Molverhältnis zwischen dem Aluminium in der wässrigen Reaktionsdispersion zur Summe der in der wässrigen Reaktionsdispersion enthaltenen netzwerkbildenden Elemente unter 0,5 liegt, wobei dann, wenn Aluminium in der wässrigen Reaktionslösung nicht vorliegt, das Unterschuss-Molverhältnis 0 beträgt, und die das aluminiumhaltige metallische Substrat enthaltende alkalisch eingestellte wässrige Reaktionsdispersion erwärmt und dem aluminiumhaltigen metallischen Substrat für den Alumosilikat-Zeolith-Bildungsprozess Aluminium entzogen und die Schicht eines Alumosilikat-Zeoliths auf dem aluminiumhaltigen metallischen Substrat durch in-situ-Aufkristallisation gebildet wird. Hierbei wird der alkalisch eingestellten wässrigen Reaktionsdispersion ein Aluminium-Komplexbildner mit O-Ankeratomen einverleibt. Ferner betrifft die Erfindung die vorteilhafte Verwendung des Verfahrenserzeugnisses in sorptionsbasierenden Anwendungsbereichen.
Abstract:
A porous ceramic honeycomb body including a substrate of intersecting porous walls forming axial channels extending from a first end face to a second end face. An active portion of the walls include a zeolite catalyst disposed inside pores thereof and/or is comprised of an extruded zeolite and a three way catalyst (TWC) is disposed on wall surfaces of at least a portion of the active portion.
Abstract:
Catalysts having a blend of platinum on a support with low ammonia storage with a Cu- SCR catalyst or an Fe-SCR catalyst are disclosed. The catalysts can also contain one or two additional SCR catalysts. The catalysts can be present in one of various configurations. Catalytic articles containing these catalysts are disclosed. The catalytic articles are useful for selective catalytic reduction (SCR) of NOx in exhaust gases and in reducing the amount of ammonia slip. Methods for producing such articles are described. Methods of using the catalytic articles in an SCR process, where the amount of ammonia slip is reduced, are also described.
Abstract:
A method for converting an alkyl halide to an olefin, the method comprising contacting a crystalline zeolite catalyst having an STI framework topology with a feed comprising the alkyl halide under reaction conditions sufficient to produce an olefin product comprising C 2 to C 5+ olefins, wherein the crystalline zeolite catalyst has a compositional formula: M y/n [Si x Q y O 2(x+y) ] where M is a cation; n is the charge of the cation, y/n is the number of cations; x/y is equal to or greater than 5; and Q is aluminum, gallium iron, boron, indium, or mixtures thereof.
Abstract translation:一种将烷基卤转化为烯烃的方法,该方法包括在足以产生包含C 2至C 5 +烯烃的烯烃产物的反应条件下使具有STI骨架拓扑结构的结晶沸石催化剂与包含烷基卤的进料接触,其中所述结晶沸石 催化剂具有组成式:My / n [SixQyO2(x + y)]其中M是阳离子; n是阳离子的电荷,y / n是阳离子的数量; x / y等于或大于5; Q是铝,镓铁,硼,铟或它们的混合物。
Abstract:
The present invention provides a mordenite zeolite having a mesopore surface area of greater than 30 m 2 /g and an average primary crystal size as measured by TEM of less than 80 nm, and methods of making the mordenite zeolite.