Abstract: A method for denitrification of water, in which the water to be denitrified is made to flow over a porous carrier which comprises a transition metal, preferably palladium, used in an amount between 0.01 and 5% by weight on the carrier and on which denitrifying bacterial strains capable of surviving in the presence of hydrogen are made to adhere, and in which hydrogen is used as a reducing agent and the pH of the reaction is adjusted to values of 4.5 to 7.8 preferably by using carbon dioxide.

Abstract: Catalysts for the oxychlorination of ethylene to 1,2-dichloroethylene, comprising compounds of Cu and Mg supported on alumina, in which the copper content, expressed as Cu, is 2 to 8% by weight, the Mg/Cu atomic ratio is from 1.2 to 2.5, and the specific surface of the catalyst is from 30 to 130 m2/g.

Abstract: A method for denitrification of water, in which the water to be denitrified is made to flow over a porous carrier which comprises a transition metal, preferably palladium, used in an amount between 0.01 and 5% by weight on the carrier and on which denitrifying bacterial strains capable of surviving in the presence of hydrogen are made to adhere, and in which hydrogen is used as a reducing agent and the pH of the reaction is adjusted to values of 4.5 to 7.8 preferably by using carbon dioxide.

Abstract: A method for denitrification of water, in which the water to be denitrified is made to flow over a porous carrier which comprises a transition metal, preferably palladium, used in an amount between 0.01 and 5% by weight on the carrier and on which denitrifying bacterial strains capable of surviving in the presence of hydrogen are made to adhere, and in which hydrogen is used as a reducing agent and the pH of the reaction is adjusted to values of 4.5 to 7.8 preferably by using carbon dioxide.

Abstract: Catalysts for the fluid-bed hydrodechlorination of carbon tetrachloride to chloroform having high catalytic stability and comprising platinum supported on microspheroidal gamma alumina, characterized in that the platinum is in the form of particles dispersed throughout the mass of the support.

Abstract: Catalysts for the oxychlorination of ethylene to 1,2-dichloroethylene, comprising compounds of Cu and Mg supported on alumina, in which the copper content, expressed as Cu, is 2 to 8% by weight, the Mg/Cu atomic ratio is from 1.2 to 2.5, and the specific surface of the catalyst is from 30 to 130 m2/g.

Abstract: The method provides for forming a supporting structure of the steering wheel, the structure having a metal core and an outer cover layer of polymer material; for each portion of the structure to be covered with valuable material (e.g. brier), two curved preformed half-shells of multilayer composite material are formed of such shape and size as to fit, facing each other, on opposite sides about the corresponding portion of the structure, so as to define a substantially continuous, tubular shell; the portion of the structure is wound, over the outer cover layer, with at least one layer of cloth impregnated with a polymer resin and to which the preformed half-shells are applied; and polymerization of the polymer resin, conducted in a heated mold, ensures adhesion of the half-shells to each other and to the structure.

Abstract: Catalysts for the fluid-bed hydrodechlorination of carbon tetrachloride to chloroform having high catalytic stability and comprising platinum supported on microspheroidal gamma alumina, characterized in that the platinum is in the form of particles dispersed throughout the mass of the support.

Abstract: A method for denitrification of water, in which the water to be denitrified is made to flow over a porous carrier which comprises a transition metal, preferably palladium, used in an amount between 0.01 and 5% by weight on the carrier and on which denitrifying bacterial strains capable of surviving in the presence of hydrogen are made to adhere, and in which hydrogen is used as a reducing agent and the pH of the reaction is adjusted to values of 4.5 to 7.8 preferably by using carbon dioxide.

Abstract: Catalysts for dehydrogenating ethylbenzene to styrene which comprise iron oxide, oxides of alkaline and alkaline-earth metals, oxides of the lanthanide series, oxides of metals of the sixth group, prepared from a paste of iron oxide impregnated with an aqueous solution of a cerium salt, treated with aqueous KOH and calcined, after drying, to preform potassium ferrate, to which the other components or precursors of the catalyst are then added.

Abstract: Catalysts in the form of cylindrical hollow granules, suitable for the dehydrogenation of ethylbenzene to styrene, and comprising, as active component, ferric oxide and promoters chosen among oxides of alkaline or alkaline-earth metals, oxides of elements of the lanthanide series, and chromium, tungsten, and molybdenum oxides, characterized by the absence of macroporosities with a radius of more than 50,000 .ANG. and/or by high mechanical characteristics of resistance to axial breaking and to abrasion.

Abstract: Hydrogenation catalysts comprising metallic palladium supported on activated carbon, wherein less than 50% by weight of the palladium is comprised within a surface layer with a depth of up to 50 microns, the remainder being comprised in a layer between 50 and 400 microns deep. The catalysts can be used in particular in purifying terephthalic acid obtained by oxidation of p-xylene.

Abstract: Catalysts and catalyst carriers, in the form of granules having a definite geometric form, characterized by porosity values such that at least 70% of the volume of the pores have a radius corresponding to the peak values of the porosity distribution curve. The catalysts and catalyst carriers are obtained by compression shaping, wherein the lubricant employed is applied to the molding of the chamber (external lubrication).

Abstract: Catalysts for the oxichlorination of ethylene to 1,2-dichlorethane, comprising copper chloride as a main component, in the form of hollow cylindrical granules having at least three through holes, obtained by compression forming by using, for lubrication, a lubricant placed on the walls of the forming chamber and on the plungers of the mold.

Abstract: An ethylene oxychlorination catalyst in granular form, consisting of CuCl.sub.2 supported on an alumina carrier, displaying a cylindrical configuration with trilobed cross-section provided with three through-bores equidistant from each other, each of which through-bores has its axis parallel to the axis of the cylindrical granule.

Abstract: A high-density and mean-porosity catalyst, supported on a siliceous matrix, based on vanadium, iron, oxygen and alkali metals, wherein the V.sub.2 O.sub.5 content ranges from 6 to 9% by weight, the Me.sub.2 O content ranges from 8.5 to 12% by weight (Me being an alkali metal), the particle density ranges from 1.10 to 1.40 g/cm.sup.3 and furthermore:the pore volume ranges from 0.20 to 0.70 cm.sup.3 /g and the surface area ranges from 0.30 to 5 m.sup.2 /g, the average radius of the pores ranging from 600 to 2200 nanometers;the SiO.sub.2 content is lower than 75% by weight and the Fe.sub.2 O.sub.3 content is higher than 0.90% by weight.

Abstract: A process for preparing a high-density and, low-silica catalyst, supported on a siliceous matrix, based on vanadium, oxygen and alkali metals, wherein the V.sub.2 O.sub.5 content ranges from 6 to 9% by weight, the K.sub.2 O content ranges from 8.5 to 12% by weight and the particle density ranges from 0.90 to 1.40 g/cm.sup.3 and wherein furthermore:the volume of the pores is from 0.30 to 0.70 cm.sup.3 /g and the surface area is from 0.30 to 3 m.sup.2 /g, the average radius of the pores being from 650 to 2200 nanometers;the SiO.sub.2 content is equal to or lower than 75% by weight and the Fe.sub.2 O.sub.3 content is equal to or greater than 0.90% by weight.

Abstract: Catalyst suitable for the oxidation of CH.sub.3 OH to CH.sub.2 O, comprising a mixture of a well known catalytic system, herein indicated as mixed oxides, based on FE.sub.2 (MoO.sub.4).sub.3 molybdenum trioxide (MoO.sub.3) with non-sintered of Fe.sub.2 O.sub.3 from 5 to 90% by weight of the sum of Fe.sub.2 O.sub.3 + mixed oxides, the surface area of the Fe.sub.2 O.sub.3 being from 1 to 10 m.sup.2 /g and the superficial area of the whole catalyst being from 1 to 6 m.sup.2 /g.