Abstract: A catalyst composition and a process for converting a hydrocarbon stream such as, for example, gasoline to olefins and C.sub.6 to C.sub.8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The catalyst composition comprises an alumina and a silica wherein the weight ratio of aluminum to silicon is in the range of from about 0.002:1 to about 0.25:1. The process comprises contacting a hydrocarbon stream with the catalyst composition under a condition sufficient to effect the conversion of a hydrocarbon to an olefin and a C.sub.6 to C.sub.8 aromatic hydrocarbon.

Abstract: The present invention relates to a zeolite catalyst, a process for using the catalyst for conversion of hydrocarbons, especially naphtha and LPG feedstock, and a process for preparing the catalyst.

Abstract: Novel Cd-exchanged rho compositions and compositions of zeolite rho encapsulated with hydrogen made therefrom are disclosed. The Cd-exchanged zeolite rho compositions are useful in separating and selectively removing hydrogen from hydrogen-containing process streams and storing the separated hydrogen therein. Encapsulation of hydrogen can be accomplished in large amounts even at pressures of 1 atmosphere.

Abstract: A catalyst composition and a process for hydrodealkylating C.sub.9 + aromatic compounds such as, for example, trimethylbenzenes, to C.sub.6 to C.sub.8 aromatic hydrocarbons such as toluene and xylenes are disclosed. The composition comprises an alumina and a silica wherein the weight ratio of aluminum to silicon is in the range of from about 0.005:1 to about 0.25:1. The process comprises contacting, in the presence of the catalyst composition, a fluid which comprises a C.sub.9 + aromatic compound with a hydrogen-containing fluid under a condition sufficient to effect the conversion of a C.sub.9 + aromatic compound to a C.sub.6 to C.sub.8 aromatic hydrocarbon; and the C.sub.9 + aromatic compound contains at least 9 carbon atoms.

Abstract: Zeolites in particulate form that are uniformly exchanged with both lithium ions and trivalent cations are produced by first partially ion-exchanging the zeolite in powdered form with one or more selected trivalent ions, then agglomerating and calcining the partially trivalent cation-exchanged zeolite, then ion-exchanging the calcined agglomerate with lithium ions, and finally activating the trivalent cation- and lithium ion-exchanged zeolite.

Abstract: A process for the modification of a small pore molecular sieve catalyst to increase its selectivity to ethylene in the production of light olefins from oxygenated compounds, particularly methanol. The catalyst is modified with phosphorus by incorporating a phosphonitrilic oligomer with the catalyst, and then calcining the catalyst at temperature sufficient to decompose the phosphonitrilic oligomer, and deposit from about 0.001 wt. % to about 50 wt. % phosphorus on the catalyst. This modification provides a novel composition in that it increases the ethylene selectivity of the catalyst in the production of light olefins from oxygenates as contrasted with a small pore molecular sieve catalyst otherwise similar except that it has not been so treated and modified with the phosphonitrilic oligomer.