摘要:
There is provided a catalyst comprising MCM-36 and a hydrogenation/dehydrogenation component. A particular example of such a catalyst comprises MCM-36, nickel and tungsten.
摘要:
There is provided a crystalline oxide material with a characteristic X-ray diffraction pattern. This material may be a layered material, which is swollen or pillared. Upon calcination of the swollen material, the layers collapse and condense upon one another in a somewhat disordered fashion to form a non-swellable material. However, the swollen layered material may be intercalated with polymeric oxide pillars to maintain layer separation, even after calcination.
摘要:
An improved process is disclosed for the isomerization of xylenes over a zeolite which may contain a platinum group metal. The improvement resides in the use of ZSM-23 zeolite which exhibits enhanced selectivity which inhibits the production of undesired C.sub.9.sup.+ aromatic transalkylation by-products. ZSM-23 having pores substantially unobstructed by silica, such as that made from a forming mixture containing amorphous precipitated silica as a silica source, has been found to be particularly useful in the process of the present invention.
摘要:
This invention relates to a novel synthetic porous crystalline molecular sieve material, MCM-65, to a reaction mixture and method for its preparation, and to use of the MCM-65 in catalytic conversion of organic compounds. The crystalline material exhibits a distinctive X-ray diffraction pattern as shown in Table 1.
摘要:
This invention relates to a new synthetic porous crystalline material, designated MCM-67, a method for its preparation and use thereof in catalytic conversion of organic compounds. MCM-67 appears to be closely related in structure to VPI-8 and SSZ-41 but is synthesized without zinc and in the presence of manganese and/or cobalt ions.
摘要:
A catalytic composition comprises a metal hydrogenation- dehydrogenation component supported on a support material comprising an ultra-large pore crystalline material of high surface area and porosity. The crystalline material exhibits unusually large sorption capacity demonstrated by its benzene adsorption capacity of greater than about 15 grams benzene/100 grams at 50 torr and 25.degree. C., and has uniformly sized pores with a maximum perpendicular cross section of at least about 13 .ANG.. In a preferred form, the support material, which is preferably a metallosilicate such as an aluminosilicate, has the pores in a hexagonal arrangement, giving rise to a hexagonal electron diffraction pattern that can be indexed with a d.sub.100 value greater than about 18 .ANG..
摘要:
A layered composition of matter, MCM-56, has an X-ray diffraction pattern including lines at d-spacing values of 12.4.+-.0.2, 9.9.+-.0.3, 6.9.+-.0.1, 6.2.+-.0.1, 3.55.+-.0.07 and 3.42.+-.0.07 Angstroms and has been selectively modified so that the ratio of the number of active acid sites at its external surface to the number of internal active acid sites is greater than that of the unmodified material. When used as an additive to a large pore zeolite catalyst in the catalytic cracking of a petroleum feedstock, the modified MCM-56 gives an improved gasoline yield/octane relationship, an improved coke selectivity and a higher combined gasoline and potential alkylate yield than an identical catalyst containing unmodified MCM-56.
摘要:
The alkylation of isoparaffin with olefin to provide alkylate is carried out in the presence of, as catalyst, a supported heteropoly acid. The support may be MCM-41, and the heteropoly acid may be dodecawolframophosphoric acid (i.e., phosphotungstic acid, i.e., H.sub.3 PW.sub.12 O.sub.40).
摘要:
This invention relates to a new synthetic composition of ultra-large pore crystalline material, e.g., [metallo]silicoaluminophosphate, having a composition, expressed on an anhydrous basis as follows:M.sub.n/q (W.sub.a X.sub.b Y.sub.c Z.sub.d O.sub.h)wherein M is one or more ions; n is the charge of the composition excluding M expressed as oxides; q is the weighted molar average valence of M; n/q is the number of moles or mole fraction of M; W is one or more divalent elements; X is one or more trivalent elements; Y is one or more tetravalent elements; Z is one or more pentavalent elements; a, b, c, and d are mole fractions of W, X, Y, and Z, respectively; (a+b+c+d)=1; a .gtoreq. 0; b, c, and d are each>0; and h is a number of from 1 to 2.5. The crystalline material is prepared by i) crystallizing a reaction mixture comprising sources of W, X, Z and an organic directing agent; ii) contacting the product of i) with a reaction mixture comprising sources of Y and organic directing agent; and iii) maintaining the mixture of ii) under conditions sufficient to form said composition of matter. The composition is suited to use for catalytic conversion of organic compounds.
摘要翻译:本发明涉及具有如下无水基础的组成的[金属]硅铝磷酸盐的超大孔结晶材料的新合成组合物:Mn / q(WaXbYcZdOh)其中M是一个或多个离子; n是不含M表示为氧化物的组成的电荷; q是M的加权摩尔平均化合价; n / q是M的摩尔数或摩尔分数; W是一个或多个二价元素; X是一个或多个三价元素; Y是一种或多种四价元素; Z是一种或多种五价元素; a,b,c和d分别为W,X,Y和Z的摩尔分数; (a + b + c + d)= 1; a> / = 0; b,c和d各自> 0; h为1〜2.5的数。 晶体材料通过i)使含有W,X,Z和有机导向剂的反应混合物结晶来制备; ii)使i)的产物与包含Y和有机导向剂的反应混合物接触; 和iii)保持ii)的混合物在足以形成所述组合物的条件下。 该组合物适用于有机化合物的催化转化。