Abstract: The present invention relates to the use of a catalytic system comprising a metal of group VIII, a metal of group VI, a metal oxide as carrier and suitable quantities of a component selected from a zeolite of the FER type, phosphorous, and a mixture thereof, in upgrading of hydrocarbons boiling in the naphtha range containing sulfur impurities, namely in hydrodesulfurization with contemporaneous skeleton isomerization of olefins contained in said hydrocarbons and/or with reduction of olefins hydrogenation, carried out in a single step.

Abstract: The present invention relates to the use of a catalytic system comprising a metal of group VIII, a metal of group VI, a metal oxide as carrier and suitable quantities of a component selected from a zeolite of the FER type, phosphorous, and a mixture thereof, in upgrading of hydrocarbons boiling in the naphtha range containing sulfur impurities, namely in hydrodesulfurization with contemporaneous skeleton isomerization of olefins contained in said hydrocarbons and/or with reduction of olefins hydrogenation, carried out in a single step.

Abstract: The present invention relates to the use of a catalytic system comprising a metal of group VIII, a metal of group VI, a metal oxide as carrier and suitable quantities of a component selected from a zeolite of the FER type, phosphorous, and a mixture thereof, in upgrading of hydrocarbons boiling in the naphtha range containing sulfur impurities, namely in hydrodesulfurization with contemporaneous skeleton isomerization of olefins contained in said hydrocarbons and/or with reduction of olefins hydrogenation, carried out in a single step.

Abstract: A procedure for the production of polymeric sulfur with improved stability that comprises the stages of: (a) cooling in a vessel for rapid cooling the sulfur vapor from the vaporization of molten sulfur, by bringing it into direct contact with a refrigerating suspension composed of carbon disulphide, soluble sulfur and polymeric sulfur, to a temperature such that part of the sulfur vapor is transformed into a powder-like polymeric sulfur, insoluble in carbon disulphide. (b) extracting the resulting suspension from the cooling vessel; (c) recycling part of said suspension to the vessel for cooling; and (d) sending the rest of the suspension to a maturation stage to stabilize the polymeric sulfur.

Abstract: A procedure for the production of polymeric sulfur with improved stability that comprises the stages of:

Abstract: A method for converting methane by an oxidative coupling reaction to longer chain hydrocarbons comprising cofeeding methane and oxygen simultaneously and continuously into a reaction zone to form a mixture, contacting said methane and oxygen mixture under oxidative coupling reaction conditions with a solid catalyst consisting essentially of manganese oxide and silicon oxide, promoted with an alkaline metal and non metal, to form longer chain hydrocarbons wherein the manganese, silicon oxide, alkali metal and non metal are present in a molar ratio 0-0.5:93.2-93.7:4.2:2.1.

Abstract: An improved method for the oxidative conversion of methane into higher hydrocarbons in which methane and oxygen are continuously and simultaneously cofed into a reaction zone under effective oxidative coupling conditions and contacted with a solid catalyst consisting essentially of a catalyst having a composition of empirical formula Ce.sub.a Na.sub.b Ca.sub.100 O.sub.x wherein a is in the range 0.03 to 2.0, b is in the range of 0.7 to 7.0 and oxygen is present in a molar amount sufficient to fulfill the valence requirements of cerium, sodium and calcium.