Abstract: Process for the regeneration of exhausted catalysts, containing one or more calcium aluminates, for steam cracking reactions, comprising treating said exhausted catalysts in a stream of water vapour at a temperature ranging from 700 to 950° C., preferably from 720 to 850° C., and at a pressure ranging from 0.5 to 2 atm.

Abstract: Process for the regeneration of exhausted catalysts, containing one or more calcium aluminates, for steam cracking reactions, comprising treating said exhausted catalysts in a stream of water vapour at a temperature ranging from 700 to 950° C., preferably from 720 to 850° C., and at a pressure ranging from 0.5 to 2 atm.

Abstract: Electrolytic membrane for light rechargeable batteries essentially consisting of:1) polymer deriving from the photopolymerization of a mixture essentially consisting of a vinyl ether having the general formula (I) R--?--O--CH.sub.2 CH.sub.2 --!.sub.n --O--CH.dbd.CH.sub.2, and a divinyl ether having the general formula (II) CH.sub.2 .dbd.CH--?--O--CH.sub.2 --CH.sub.2 --!.sub.m --O--CH.dbd.CH.sub.2, in a quantity of between 15 and 60% by weight;2) plasticizer in a quantity of between 35 and 75% by weight;3) Lithium salt in a quantity of between 5 and 20% by weight;4) photopolymerization initiator in such a quantity as to photopolymerize (I) and (II);5) zeolite in a quantity of between 3 and 30% by weight;the percentage sum of components (1) to (5) being equal to 100.

Abstract: Composite cathode comprising:(A) a powder of active cathode material;(B) an electronic conductor;(C) an electrolyte essentially constituted by a polymer composition comprising:(C.sub.1) a polymer deriving from the polymerisation of a vinyl ether and a divinyl ether;(C.sub.2) litium tetrafluoroborate alone or in a mixture with other lithium salts.The above-mentioned composite cathode can be employed in solid electrolytic cells.

Abstract: Electrolytic membrane for light rechargeable batteries essentially consisting of:1) polymer deriving from the photopolymerization of a mixture essentially consisting of a vinyl ether having the general formula (I) R--?--O--CH.sub.2 CH.sub.2 --!.sub.n --O--CH.dbd.CH.sub.2, and a divinyl ether having the general formula (II) CH.sub.2 .dbd.CH--?--O--CH.sub.2 --CH.sub.2 --!.sub.m O--CH.dbd.CH.sub.2, in a quantity of between 15 and 60% by weight;2) plasticizer in a quantity of between 35 and 75% by weight;3) Lithium salt in a quantity of between 5 and 20% by weight;4) photopolymerization initiator in such a quantity as to photopolymerize (I) and (II);5) zeolite in a quantity of between 3 and 30% by weight;the percentage sum of components (1) to (5) being equal to 100.

Abstract: A solid polymeric electrolytic membrane comprising a solution of an ion compound in a cross-linked polyether including a liquid plasticizer obtained by:a) copolymerizing a vinyl ether of the formula:R--(O--CH.sub.2 --CH.sub.2 --).sub.n --O--CH=CH.sub.2 (I)with an allyl vinyl ether of the formula:CH.sub.2 =CH--CH.sub.2 --(O--CH.sub.2 --CH.sub.2 --).sub.m --O--CH=CH.sub.

Abstract: The instant invention provides a solid, polymeric electrolyte in membrane form, constituted by a solid solution of an ionic compound in a crosslinked polyether, characterized in that said polymeric electrolyte is obtained by (1) blending a prepolymer, an ionic compound, a plasticizer, and a free-radical-generating activator; and (2) applying the resulting blend on an inert carrier and exposing said blend to a source of ultraviolet light, thermal radiation or electron beam, until the blend is completely crosslinked. The instant invention also provides an electrolyte separator for use in electrochemical devices, optical and electrochemical displays and sensors, which comprises the polymeric electrolyte of the instant invention.