Abstract: There is provided a process for activating a zeolite with an aluminum phosphate material. The process comprises hydrothermally treating an intimate mixture of the zeolite and an effective amount of aluminum phosphate activating agent in contact with an aqueous liquid phase under reaction conditions to increase the cracking activity of the mixture. Examples of zeolites which may be activated include low acidity zeolites such as boron-containing ZSM-5, boron-containing zeolite Beta and high silica ZSM-5. The aluminum phosphate may be in the form of a microporous, crystalline framework material such as AlPO.sub.4 -5.

Abstract: There is provided a mixed catalyst of ZSM-5 and ZSM-12. Alkylbenzenes, especially heavy aromatic bottoms from cumene production, may be cracked over this mixed catalyst.

Abstract: There is provided a process for producing aromatic hydrocarbons enriched in benzene content. The process involves contacting one or more C.sub.2 -C.sub.8 non-aromatic hydrocarbons, such as propylene, with a catalyst containing a zeolite, such as ZSM-5. The proportion of benzene in the aromatics produced is increased by including hydrogen sulfide (i.e. H.sub.2 S) in the feedstock.

Abstract: There is provided a process for producing aromatic hydrocarbons from paraffins. The process involves contacting one or more C.sub.2 -C.sub.12 alkanes with a catalyst containing a zeolite, such as ZSM-5, modified with one or more oxides of Group IIIA, IVA or VA elements, such as Sc, Ti or V. The presence of these particular oxide modifiers has been observed to result in greater yields of aromatics including BTX.

Abstract: There is provided a method for preparing a microporous crystalline aluminum phosphate with a urea templating agent. Also provided are microporous, crystalline aluminum phosphates having characteristic structures.

Abstract: There is provided a process for producing aromatic hydrocarbons. The process involves contacting one or more non-aromatic compounds, such as propane, propylene, or methanol, with a catalyst containing a zeolite, such as ZSM-5. The zeolite is modified with phosphorus oxide by impregnating the zeolite with a source of phosphate ions, such as an aqueous solution of an ammonium phosphate, followed by calcination.

Abstract: A process for the production of 3,4-dimethyl-1-ethylbenzene by selective alkylation of dimethylbenzene with ethylene. The process is carried out in the presence of a crystalline zeolite catalyst having a silica to alumina mole ratio of at least about 12 and a Constraint Index of greater than 2 and up to about 12.

Abstract: There is provided a method for the selective sorption of n-alkylbenzene, such as n-propylbenzene, from an alkylbenzene mixture, such as a mixture of n-propylbenzene and isopropylbenzene, with an oxide impregnated ZSM-5 sorbent. This method may be particularly useful in the purification of cumene product streams.

Abstract: There is provided a mixed catalyst of ZSM-5 and ZSM-12. Alkylbenzenes, especially heavy aromatic bottoms from cumene production, may be cracked over this mixed catalyst.

Abstract: There is provided a method and a reaction mixture for preparing the zeolite, Dodecasil-1H, with a methylazabicyclononanium directing agent. There is also provided the Dodecasil-1H zeolite in as-synthesized form prepared by this method.

Abstract: There is disclosed a process for preparing a ZSM-12 crystalline zeolite wherein the organic template used in the synthesis has the formula: ##STR1## wherein n=4-10. The template, designated herein DABCO-C.sub.n -diquat, is obtained from a dihalide salt of the template or from a hydroxide thereof.

Abstract: This invention relates to a method for preparing a synthetic porous crystalline aluminosilicate zeolite, characterized as zeolite ZSM-45. This crystalline material may have a molar ratio of silica to alumina of at least 8. This synthetic zeolite is analogous, in some respects, to the naturally occuring zeolite, levynite. The ZSM-45 zeolite is prepared with a cobalticinium directing agent. ZSM-45 exhibits a characteristic X-ray diffraction pattern.

Abstract: A new zeolite, designated ZSM-22, is disclosed and claimed. The new zeolite has the composition, in the anhydrous state, expressed in terms of mole ratios of oxides as follows:(x)Q.sub.2 O:(y)M.sub.2/n O:(z)L.sub.2 O.sub.3 :100SiO.sub.2wherein Q.sub.2 O is the oxide form of an organic compound containing an element of Group 5-B (as defined in the Table of the Elements--National Bureau of Standards, Fischer Scientific Co. Catalog No. 5-702-10), e.g., N or P, preferably N, containing at least one alkyl or aryl group having at least 2 carbon atoms, M is an alkali or alkaline earth metal having a valence n, e.g., Na, K, Cs or Li and wherein x=0.01-2.0, y=0-2.0, z=0-5, and L=Al. The new zeolite, ZSM-22, can be used in catalytic dewaxing of petroleum stocks in the presence or absence of added hydrogen.

Abstract: A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite or dimethylmethylphosphonate in order to improve the para-selective properties of such catalysts for the conversion of aromatic materials. The modified zeolites so treated are those which contain a minor proportion of a difficultly reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation, transalkylation or disproportionation processes to provide alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

Abstract: A method is provided for treating modified ZSM-5 type zeolite catalysts with water vapor in order to enhance the aromatics conversion activity and/or the para-selective properties of such catalysts for the conversion of aromatic materials. The modified zeolites so treated are those which contain a minor proportion of a difficultly reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation, transalkylation or disproportionation processes to provide improved yields of alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

Abstract: There is provided a catalyst comprising ZSM-12 and two modifiers. The modifiers are (i) magnesium and/or manganese and (ii) platinum. There is also provided a process for converting propane to propylene by a dehydrogenation reaction with this catalyst.

Abstract: A modified zeolite catalyst composition is provided for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified prior to use by treatment with compounds of the Group VI A metals (Cr, Mo, W), and optionally phosphorus, followed by conversion of these elements to the oxide form, thereby incorporating these oxides into the crystal structure of the zeolite. This modification enhances the ability of the zeolite to selectively catalyze the production of the 1,4-dialkylbenzene isomer.

Abstract: A method is provided for treating modified ZSM-5 type zeolite catalysts with a vapor phase organophosphorus reagent such as trimethylphosphite or dimethylmethylphosphonate in order to improve the para-selective properties of such catalysts for the conversion of aromatic materials. The modified zeolites so treated are those which contain a minor proportion of a difficultly reducible oxide such as magnesium oxide, calcium oxide and/or phosphorus oxide. Such catalyst compositions can be used in alkylation, transalkylation or disproportionation processes to provide alkylated aromatic product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.

Abstract: A process for alkylation of aromatic hydrocarbon reactants to dialkylbenzene products, whereby chemically modified zeolite catalysts are treated with an organic acid to enhance their intrinsic para-selectivity in the alkylation reaction. The modified zeolites which may be so reselectivated or improved comprise those crystalline zeolites having a constraint index of 1 to 12, a silica to alumina mole ratio of at least 12, and having a minor proportion of the oxide form of one or more chemical elements (e.g. phosphorus and magnesium) deposited thereon.

Abstract: There is provided the polymerization of 1-olefins such as ethylene with zeolite supported, chromium catalyst compositions. Chromium ions are ion exchanged with zeolites to produce such catalysts.