Abstract: A process for the production of mono-olefins from a paraffin-containing hydrocarbon feed having at least two carbon atoms which comprises a first step of partially combusting a mixture of the hydrocarbon feed and a molecular oxygen-containing gas in contact with a catalyst capable of supporting combustion beyond the normal fuel rich limit of flammability, the first step being carried out under a total pressure of greater than 5 bar absolute and at a temperature of greater than 650.degree. C.; and a second step of cooling the mono-olefinic products to 600.degree. C. or less within less than 50 milliseconds of formation.

Abstract: A neutral circuit current monitoring device detects at least one current level, which includes harmonic currents, flowing in a neutral circuit of a power distribution system such that preliminary warnings can be given to personnel operating the system before serious overload problems exist. Warnings can be given via audible and/or visual alarms and/or by electrical contacts which can be used to operate auxiliary devices. Preferably, two current levels defined by interchangeable secondary fuses within the monitoring circuit are detected with a first or low current level in the neutral circuit being calculated to also indirectly monitor for overheating of the distribution transformer caused mainly by circulating third harmonic currents in the transformer primary. The low current level permits personnel to investigate and correct a developing problem before it occurs. Preferably, a second or high current level of the current sensor can be set at a value less than 100% of the phase current rating.

Abstract: A process for the conversion of hydrocarbons using an alumina-based catalyst which is prepared by(a) selecting an alumina catalyst having a bulk density of at least 0.6 g/ml and a pore volume of less than 0.6 ml/g;(b) heating the alumina of (a) to a temperature of at least 1000.degree. C. in the presence of a sintering agent containing at least one metal selected from nickel, chromium, cobalt and platinum; and(c) recovering a sintered alumina-based catalyst having a bulk density and an attrition resistance greater than that of the alumina of (a). Catalysts prepared by this process are useful in hydrocarbon conversion processes.

Abstract: A process for the preparation of an alumina-based catalyst which comprises:(a) selecting an alumina catalyst having a bulk density of at least 0.6 g/ml and a pore volume of less than 0.6 ml/g;(b) heating the alumina of (a) to a temperature of at least 1000.degree. C. in the presence of a sintering agent containing at least one metal selected from nickel, chromium, cobalt and platinum; and(c) recovering a sintered alumina-based catalyst having a bulk density and an attrition resistance greater than that of the alumina of (a). Catalysts prepared by this process are useful in hydrocarbon conversion processes.

Abstract: Compounds which are .beta.-farnesene derivatives obtainable as a Diels-Adler adduct of .beta.-farnesene and a dienophile or by a modification of such an adduct in a manner as defined herein are of value in pest control, particularly in the control of aphids.