Abstract: 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.

Abstract: Catalytic conversion of hydrocarbon compounds in the presence of crystalline zeolite ZSM-35, or a thermal decomposition product thereof, is provided. Zeolite ZSM-35 has a 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 : (x) SiO.sub.2wherein R is an organic nitrogen-containing cation derived from ethylenediamine or pyrrolidine, M is an alkali metal cation and x is greater than 8, and is characterized by a specified X-ray powder diffraction pattern.

Abstract: 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.

Abstract: 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".

Abstract: A new crystalline zeolite, designated ZSM-23, 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;(0.58-3.4)M.sub.2/n O : Al.sub.2 O.sub.3 : (40-250)SiO.sub.2wherein M is at least one cation having a valence n, and is characterized by a specified X-ray powder diffraction pattern.

Abstract: 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.

Abstract: As synthesized by previous methods, ZSM-4 zeolites are crystallized in the presence of substantial amounts of a tetramethylammonium hydroxide or halide. When synthesized in this way, they contain the tetramethylammonium cation as well as a metal cation such as sodium. To obtain a more catalytically active form, the sodium ion must be exchanged to very low levels. Catalysts prepared in this manner have been found to be quite low in stability. By synthesizing these zeolites in the presence of pyrrolidine or choline salts, ZSM-4 having a different organic nitrogen containing cation but the same crystal structure as previously prepared ZSM-4 is obtained. Catalysts made therefrom are, surprisingly, much more stable than those prepared from ZSM-4 made by previous methods.

Abstract: Gaseous C.sub.2 -C.sub.5 olefins, either alone or in admixture with paraffins having 1 to 5 carbon atoms, are converted into gasoline blending stock with a good research octane number by passage over ZSM-4, ZSM-12, ZSM-18, chabazite or Zeolite beta.

Abstract: A new crystalline zeolite, designated ZSM-35, a method of making same and the use thereof in catalytic conversion of hydrocarbons 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:(0.3-2.5)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 is characterized by a specified X-ray powder diffraction pattern.

Abstract: 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.

Abstract: A process for cracking a hydrocarbon material in two separate reaction zones, each of which contains a different crystalline aluminosilicate zeolite, one of such zeolites having a pore size of less than 6 Angstrom units and the other of such zeolites having a pore size greater than 8 Angstrom units.

Abstract: This invention relates to a process for converting hydrocarbons in the presence of a catalyst comprising a ZSM-35 crystalline aluminosilicate, which zeolite, as crystallized, is in the form of very small particles having diameters, in the range of 0.005 micron to 0.1 micron. The use of such small crystalline ZSM-35 zeolite as catalyst in hydrocarbon conversion serves to retard catalyst aging during the hydrocarbon conversion reaction.

Abstract: Gaseous C.sub.2 -C.sub.5 olefins, either alone or in admixture with paraffins, are converted into an olefinic gasoline blending stock with a good research octane number in good yields by passage over a ZSM-5 type zeolite catalyst of controlled acidity. The catalyst must have reduced activity for cracking of n-hexane or aromatization of olefins or paraffins if it is to be useful for the purpose of this invention.

Abstract: A crystalline aluminosilicate zeolite catalyst made by a process comprising the steps of exchanging the zeolite, heating it, compositing the resulting product with a porous matrix and reexchanging the composite product is provided. The invention also provides a method of converting a hydrocarbon charge using such catalyst.