摘要:
Conversion, e.g. dehydration of aliphatic organic oxygenates having up to about 6 carbon atoms by contact with a crystalline aluminosilicate zeolite, preferably ZSM-5, having a silica to alumina ratio substantially greater than 10, at a temperature of about 70.degree. to 1400.degree. F., depending upon the exact nature of the reactant and product.
摘要:
ZSM-5 type zeolites as more specifically defined hereinabove, are added to reforming catalysts in order to produce a new catalyst composition with high catalytic activity and excellent selectivity. These new catalysts when utilized in reforming naphtha, reduce the C.sub.1 plus C.sub.2 concentrations in reformer gas product, while increasing the C.sub.3 plus C.sub.4 concentrations.
摘要:
A new crystalline zeolite, designated ZSM-43, a method of making same and the use thereof in catalytic conversion of organic compounds is the subject of this application. The new zeolite has a composition, in the anhydrous state, expressed in terms of mole ratios of oxides, as follows:(0.6 to 2.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2wherein M is at least one cation having a valence n and x is at least 5, and is characterized by a specified X-ray powder diffraction pattern.
摘要:
Crystalline aluminosilicate zeolites are mixed with conventional reforming catalysts to produce new catalytic compositions with high catalytic activity and selectivity and excellent aging characteristics. These new catalytic compositions may be utilized alone or in conjunction with conventional reforming catalysts. The acidic activity of the total catalyst system is controlled within defined limits. When so controlled the utility of these catalyst systems in reforming hydrocarbon mixtures is to reduce the C.sub.1 and C.sub.2 concentrations in reformer gas product, while increasing the C.sub.3 and C.sub.4 concentrations and maintaining high liquid yield at high octane numbers.
摘要:
A method is disclosed for synthesizing a crystalline aluminosilicate zeolite containing an organic nitrogen cation in the presence of a primary monoalkylamine having 2 to 9 carbon atoms in the alkyl portion. The method produces a zeolite having a very low percentage, i.e. less than about 0.14 weight percent, generally less than about 0.1 weight percent of alkali metal, e.g. sodium, in the as-synthesized form. The product can be used directly as a catalyst without intermediate precalcination and cation exchange. This is not possible with zeolites such as those of the ZSM-5 type synthesized by the methods of the art.
摘要:
Crystalline aluminosilicate catalysts, especially those containing zinc, are stabilized with respect to elution of the zinc by adding thereto another metal of Group IB or Group VIII (e.g. copper or nickel). Germanium, rhenium and the rare earth metals may also be added.
摘要:
A crystalline zeolite, designated ZSM-34, having the composition as synthesized and in anhydrous form, expressed as mole ratios of oxides as follows:(0.5-1.3)R.sub.2 O: (0-0.15)Na.sub.2 O: (0.10-0.50)K.sub.2 O: Al.sub.2 O.sub.3 : XSiO.sub.2where R is the organic nitrogen-containing cation derived from choline [(CH.sub.3).sub.3 NCH.sub.2 CH.sub.2 OH] and X is 8 to 50, said zeolite having an X-ray diffraction pattern, identifying it as a member of the offretite-erionite family and the ability, after calcination at 1000.degree. F for at least a period of time to remove the organic cation, to sorb at least 9.5 weight percent of n-hexane at ambient temperature and a n-hexane pressure of 20mm. Organic compound conversion is carried out in the presence of a catalytically-active form of said zeolite.
摘要:
A catalytic process is provided for converting a charge consisting essentially of methanol, dimethyl ether or mixtures thereof to a hydrocarbon product rich in ethylene and propylene by contact, under conversion conditions, with a catalyst comprising the crystalline aluminosilicate zeolite designated "ZSM-34".
摘要:
A catalytic process is provided for converting an organic charge consisting essentially of methanol, dimethyl ether or mixtures thereof together with at least about 0.25 moles of water per mole of said organic charge to a hydrocarbon product rich in ethylene and propylene by contact, under conversion conditions, with a catalyst comprising a crystalline aluminosilicate zeolite of the erionite-offretite family.
摘要:
A new family of crystalline zeolites, designated ZSM-21, a method of making same and the use thereof in catalytic conversion of hydrocarbons is the subject of this application. The new zeolites have the composition, in the anhydrous state, expressed in terms of mole ratios of oxides as follows:(0.3-2.5)R.sub.2 O : (0-0.8)M.sub.2 O : Al.sub.2 O.sub.3 : >8 SiO.sub.2wherein R is an organic nitrogen-containing cation and M is an alkali metal cation, and are characterized by a specified X-ray powder diffraction pattern.