摘要:
The present invention is directed to open-framework and microporous solids particularly well suited for use in catalysis and ion exchange. The microporous solids are constructed by using a salt template which can be readily removed without destroying the framework of the micropore. Various microporous solids can be formed having different geometric structures depending upon the templating salt used and the concentration. Examples of two compounds include Na2Cs[Mn3(P2O7)2]Cl(1) and K2.02Cs2.90[Cu3(P2O7)2]C12.92(2). Compound 1 crystallizes in the space group C2/c with a=21.210(8), b=5.272(2), c=13.924(2)Å, beta=119.04(2), and Z=4. Compound 2 crystallizes in the space group 14/mcm with a=b=18.001(3), c=13.530(4)Å, and Z=8. Both compounds have 3-D (Mn, Cu)—P—O frameworks. For 1, two MnO4, two MnO5 polyhedra and four PO4 tetrahedra form small tunnels where Cs+ and Cl− ions reside. For 2, CuO4 and P2O7 groups form two different tunnels, one is similar to that in 1 (ca. 5.3 Å in diameter) while the other formed by eight CuO4 polyhedra and eight PO4 tetrahedra has an approximate diameter of 12 Å.
摘要:
A method of preparing silicoaluminophosphate (SAPO) compositions from a forming mixture which comprises sources of oxides of silicon, aluminum and phosphorus and quaternary ammonium-functionalized organosiliconate directing agent wherein the oxides of silicon are provided at least in part by said directing agent, e.g., N-trimethoxysilylpropyl-N,N,N-trimethylammonium chloride.
摘要:
A synthetic zeolite material, designated zeolite Nu-5, having a molar composition expressed by the formula; 0.5 to 1.5 R.sub.2 O: Y.sub.2 O.sub.3 : at least 10 XO.sub.2 : 0 to 2000 H.sub.2 O wherein R is a monovalent cation or 1/n of a cation of valency n, X is silicon and or germanium, Y is one or more of aluminium, iron, chromium, vanadium, molybdenum, arsenic, manganese, gallium or boron, and H.sub.2 O is water of hydration additional to water notionally present when R is H, and having a defined X-ray diffraction pattern. Zeolite Nu-5 is a useful catalyst.
摘要:
A catalyst is provided, which is especially applicable for the selective production of certain desired hydrocarbons, comprising a crystalline aluminosilicate zeolite having a silica to alumina ratio of at least about 12, a constraint index, as hereinafter defined, within the approximate range of 1 to 12 and having contained within the interior crystalline structure thereof added amorphous silica in an amount of at least about 0.1 and preferably between about 2 and about 10 weight percent. The invention described herein also encompasses synthesis of the specified catalyst and use of the same in selectively producing low molecular weight olefins and/or para-xylene from appropriate charge stocks.
摘要:
A phosphorus-containing or phosphorus-modified ZSM-5 molecular sieve is characterized in that in its 27Al MAS-NMR, the ratio of peak area for the resonance signal having a chemical shift of 39±3 ppm to peak area for the resonance signal having a chemical shift of 54 ppm±3 ppm is ≥1; or in its surface XPS elemental analysis, the value of n1/n2 is ≤0.1. n1 represents the mole number of phosphorus, n2 represents the total mole number of silicon and aluminum. A cracking auxiliary or cracking catalyst contains the phosphorus-containing/phosphorus-modified ZSM-5 molecular sieve can be made using the phosphorus-containing or phosphorus-modified ZSM-5 molecular sieve.
摘要:
A new family of crystalline microporous metallophosphates designated AlPO-92 has been synthesized. These metallophosphates are represented by the empirical formula Cc+Aa+Mm2+EPxSiyOz where M is a divalent framework metal such as magnesium, C is a cyclic organoammonium cation, A is an acyclic organoammonium cation, and E is a trivalent framework element such as aluminum or gallium. The AlPO-92 compositions are characterized by a new unique ABC-6 net structure, and have catalytic properties suitable for carrying out various hydrocarbon conversion processes, as well as characteristics suitable for the efficient adsorption of water vapor in a variety of applications, such as adsorption heat pumps.
摘要:
A catalyst composition is provided having a CHA crystal structure; about 0.5 to about 5.0 mol % phosphorus; and SiO2 and Al2O3 in a mole ratio of about 5 to about 40. The catalyst composition is capable of NOx conversion at elevated temperatures. A catalytically active washcoat includes such catalyst compositions and one or more promoters or stabilizers, and may be applied to a monolith substrate to produce a catalytically active article. Methods of reducing NOx employing the catalyst compositions are also provided.
摘要翻译:提供具有CHA晶体结构的催化剂组合物; 约0.5至约5.0mol%的磷; 和摩尔比为约5至约40的SiO 2和Al 2 O 3。催化剂组合物能够在升高的温度下进行NOx转化。 催化活性的修补基面涂料包括这样的催化剂组合物和一种或多种促进剂或稳定剂,并且可以应用于整料基材以产生催化活性制品。 还提供了使用催化剂组合物还原NOx的方法。
摘要:
A MFI-structured molecular sieve containing phosphorus and metal components has a formula expressed in anhydrous form and on the basis of oxide weight, as follows: (0˜0.3) Na2O (0.5˜5.5) Al2O3 (1.3˜10) P2O5 (0.7˜15) M1xOy (0.01˜5) M2mOn (70˜97) SiO2, wherein M1 is one of transition metals selected from the group consisting of Fe, Co and Ni, and M2 is any one of metals selected from the group consisting of Zn, Mn, Ga and Sn. Preparation processes and uses of the instant molecular sieve are also provided. The molecular sieve has an excellent performance for increasing the yield of lower olefins and increasing the aromatics content in gasoline, and can be used as a shape-selective active component for the catalytic cracking catalyst of petroleum hydrocarbons or its additives.
摘要翻译:含有磷和金属组分的MFI结构分子筛具有无水形式和氧化物重量的表达式:(0〜0.3)Na 2 O(0.5〜5.5)Al 2 O 3(1.3〜10)P 2 O 5(0.7〜 15)M1xOy(0.01〜5)M2mOn(70〜97)SiO2,其中M1是选自Fe,Co和Ni中的过渡金属之一,M2是选自Zn, Mn,Ga和Sn。 还提供了即时分子筛的制备方法和用途。 该分子筛具有优异的提高低级烯烃的产率和提高汽油中芳烃含量的性能,可用作石油烃或其添加剂的催化裂化催化剂的形状选择性活性成分。
摘要:
A catalyst comprising a novel zeolite NU-87, is useful in a wide variety of hydrocarbon conversion reactions including isomerisation, transalkylation and alkylation.
摘要:
The invention relates to a novel process for the synthesis of zeolites of the ferrisilicate type called ferrizeosilites, to the products obtained by this process as well as their uses. Ferrizeosilite according to the invention is characterized by (a) a chemical formula close to the following:M.sub.2/n O, Fe.sub.2 O.sub.3, x SiO.sub.2whereM represents a proton and/or a metal cationn is the valence of said cationx is a number between 40 and 1000(b) an x-ray diffraction diagram, and (c) a fluorine content between about 0.01% and 16% by weight. Uses are in processes for the conversion of methanol into hydrocarbons, alkylation of toluene with methanol and catalytic cracking of hydrocarbons.