Abstract: A zeolite of improved stability for use in acid-catalyzed reactions is prepared by mildly presteaming the catalyst under controlled conditions of temperature, time, and steam partial pressure. The resulting catalyst retains nearly the same activity as that of a fresh unsteamed catalyst.

Abstract: Residual products obtained in the catalytic dehydration of alpha-methylbenzyl alcohol are treated to recover increased quantities of ethylbenzene by a process which comprises thermally cracking the residual products in the substantial absence of hydrogen under elevated pressures.

Abstract: Allylbenzene is converted to indene by means of a tungsten-containing catalyst.

Abstract: Processes and compositions are described for the use in foodstuff flavor and aroma, tobacco flavor and aroma and perfume and perfumed article aroma augmenting, modifying, altering and enhancing compositions and as foodstuff, chewing gum, toothpaste, medicinal product, tobacco, perfume and perfumed article aroma imparting materials of acetyl hydrindacenes and acetyl indanes and mixtures of same, said acetyl indanes and acetyl hydrindacenes having the structures: ##STR1## and existing in the liquid phase at ambient temperature and pressure.

Abstract: Processes and compositions are described for the use in foodstuff flavor and aroma and perfume and perfumed article aroma augmenting, modifying, altering and enhancing compositions and as foodstuff, chewing gum, toothpaste, medicinal product, perfume and perfumed article aroma imparting materials of certain indane alkanols and tricyclic isochromans defined according to the generic structure: ##STR1## wherein one of R.sub.1, R.sub.2, R.sub.3 or R.sub.4 is C.sub.2 H.sub.5 and the remaining R.sub.1, R.sub.2, R.sub.3 and R.sub.4 represents methyl; wherein X is --CH.sub.2 -- or hydrogen and wherein the dashed line represents a carbon-carbon single bond or no bond with the proviso that when X is --CH.sub.2 --, then the dashed line is a carbon-carbon single bond and when X is hydrogen, the dashed line represents no bond.Addition of said indane alkanols or said tricyclic isochromans or mixtures thereof is indicated to produce:A.

Abstract: A multi-stage dehydrogenation process for preparing indene and substituted indenes from indene precursors more saturated than indene is described. The process comprises the steps of(a) contacting said indene precursor in a first dehydrogenation zone with a dehydrogenation catalyst at an elevated temperature to form an intermediate product,(b) advancing the product of the first dehydrogenation zone to a second dehydrogenation zone,(c) contacting said product in the second dehydrogenation zone with a second dehydrogenation catalyst at an elevated temperature, and(d) recovering indene or a substituted indene from said second zone.The process of the invention results in yields of indene which are enhanced when compared to single stage, essentially isothermal processes using a single catalyst.

Abstract: An oxydehydrogenation process for producing indene and substituted indenes from indene precursors more saturated than indene is described and comprises contacting said precursor with oxygen and a catalyst comprising cobalt oxide and molybdenum oxide at an elevated temperature above about 300.degree. C. Preferably the reaction is conducted at a temperature of about 500.degree.-650.degree. C. for a period of from 0.1 to about 30 seconds.

Abstract: A dehydrogenation process for producing indene and substituted indenes from tetrahydroindene or substituted tetrahydroindene is described and comprises contacting said tetrahydroindene or substituted tetrahydroindene with a catalyst comprising cobalt oxide and molybdenum oxide at an elevated temperature for a period of from about 0.1 to 30 seconds. The tetrahydroindene and substituted tetrahydroindenes may be prepared from cyclopentadiene or dicyclopentadiene and a butadiene.

Abstract: A process for the co-production of indene and styrene from a mixture of cyclopentadiene or dicyclopentadiene and butadiene is disclosed. The process comprises the steps of reacting cyclopentadiene or dicyclopentadiene with butadiene in a Diels-Alder reaction to form a mixture of tetrahydroindene, vinylcyclohexene and vinylnorbornene followed by the recovery of the tetrahydroindene and vinylcyclohexene, and the oxydehydrogenation of the tetrahydroindene/vinylcyclohexene mixture utilizing a composite catalyst comprising cobalt oxide and molybdenum oxide.

Abstract: Aluminum cyclopentadienyl compounds can be used to synthesize a variety of organic molecules containing the cyclopentadiene group, e.g., substituted cyclopentadiene compounds, polymer molecules with cyclopentadiene pendant groups, and polymer molecules with cyclopentadiene terminal groups.

Abstract: A process for producing a linear unsaturated dimer of .alpha.-alkyl styrenes by heating .alpha.-alkyl styrenes in the presence of a silica-alumina catalyst, said catalyst consisting of alumina and silica in a weight ratio of 83/17.ltoreq.Al.sub.2 O.sub.3 /SiO.sub.2 .ltoreq.96/4 and being substantially free of alkali is disclosed.