Abstract: A method for manufacturing a catalyst, wherein a substrate (I) is introduced into a processing chamber (2, 102); wherein at least one plasma (P) is generated by at least one plasma cascade source (3, 103); wherein at least one deposition material (A, B) is deposited on the substrate (1, 101) under the influence of the plasma (P). The invention further provides an apparatus for manufacturing a catalyst, the apparatus being provided with at least one plasma cascade source (3, 103) for generating at least one plasma (P), the apparatus comprising means for bringing deposition material (A, B) into each plasma (P), the apparatus being further provided with substrate positioning means (8, 118) to bring and/or keep at least a part of a substrate (1, 101) in such a position in a processing chamber (2, 102) that the substrate (1, 101) makes contact with the plasma (P).

Abstract: Catalyst comprising a titania carrier and one or more metal compounds which metals are selected from the group consisting of vanadium, molybdenum and tungsten, which catalyst has a surface area measured by nitrogen adsorption of between about 70 m2/g and about 99 m2/g, a process for preparing such catalyst, catalyst obtainable by such preparation process and a process for selectively converting nitrogen oxide compounds with the help of such catalyst.

Abstract: A process for the preparation of a quanternary ammonium hydroxide, which comprises electrolyzing a quaternary ammonium halide in a divided electrolysis cell wherein the anode material is selected from iron, nickel, zinc, molybdenum and manganese, and an electrolysis cell specifically adapted for use in the process.

Abstract: A process for the preparation of a silver-containing catalyst suitable for the oxidation of ethylene to ethylene oxide which comprises:(a) mixing alumina with a tin compound and with an alkali metal compound,(b) calcining the mixture to obtain an alkali metal-enriched and tin-modified alumina carrier,(c) impregnating the carrier with a solution of a silver compound, which is sufficient to cause precipitation on the carrier of from 1 to 25 prer cent by weight, on the total catalyst, of silver and before, during or after that impregnation also impregnating the carrier with one or more dissolved alkali metal compounds and with a rhenium compound as promoters,(d) precipitating the sliver compund on the carrier and(e) reducing the silver compound to metallic silver.

Abstract: The invention relates to a process for preparing a silver catalyst suitable for use in the oxidation of ethylene to ethylene oxide characterized in that an alkali metal enriched alumina carrier, which has been calcined, is impregnated with a solution of a silver compound, sufficient to cause precipitation on the carrier of from 1 to 25 percent by weight, on the total catalyst, of silver, and before, during or after that impregnation also with one or more dissolved potassium, rubidium or cesium compounds as promoter and with a rhenium compound, and after precipitation the silver compound on the impregnated carrier is reduced to metallic silver.

Abstract: A process for the preparation of a silver-containing catalyst suitable for the oxidation of ethylene to ethylene oxide which comprises:(a) mixing alumina with a salt of an alkali metal and with aluminum fluoride or aluminum chloride,(b) calcining the mixture to obtain an alkali enriched alumina carrier,(c) applying a silver compound to the alkali enriched alumina carrier and converting said silver compound to metallic silver.

Abstract: The invention relates to a process for the preparation of a silver-containing catalyst suitable for the oxidation of ethylene to ethylene oxide which comprises(a) mixing alumina with a tin compound and with an alkali metal compound,(b) calcining the mixture to obtain an alkali-enriched and tin containing alumina carrier,(c) applying a silver compound to the alumina carrier and converting said silver compound to metallic silver.The catalyst has a high activity, a high selectivity combined with a very high stability.

Abstract: Process of preparing a bimetallic catalyst comprising(a) applying a titanium compound to an inorganic carrier;(b) applying, simultaneously with or after applying the titanium compound, to the inorganic carrier at least one additive which is selected from the group consisting of a bromine compound, a fluorine compound and an iodine compound;(c) applying, simultaneously with or after applying the additive, to the inorganic carrier a vanadium compound;(d) drying the carrier; and(e) subjecting the carrier to a heat treatment at a temperature between 200.degree. C. and 800.degree. C.

Abstract: A process for removing HCN from gases, which may also contain a hydrogen halide, by hydrolysis in the presence of a supported metal from Group 3b and/or 4b, use being made of a silica-containing carrier or support.

Abstract: The invention relates to an improved silver catalyst, suitable for use in the oxidation of ethylene to ethylene oxide, characterized by(a) a calcined, alkali metal-enriched alumina carrier and(b) from 1 to 25 percent by weight of metallic silver, based on the weight of the total catalyst,(c) an alkali metal of the group consisting of potassium, rubidium, cesium and mixtures, in the form of an oxide or hydroxide as a promoter and(d) a fluoride-anion,the latter two under (c) and (d) each being in an amount between 10 and 1000 parts by weight per million parts by weight of the total catalyst.

Abstract: The invention relates to a process for the preparation of a silver catalyst suitable for the oxidation of ethylene to ethylene oxide, characterized in that a silver compound and, if desired, a promoter are applied to a carrier, after which the silver compound is reduced to metallic silver, and in which process the carrier has been prepared by mixing an aluminum compound with an alkali metal hydroxide and with an organic fluorine compound and by calcining the obtained mixture, to the silver catalysts prepared by means of this process and to the use of the silver catalysts in the preparation of ethylene oxide.

Abstract: This invention relates to ethylene oxide catalysts comprising silver, alkali metal promoters supported on a carrier, which carrier is prepared by a process which comprises mixing an aluminum compound with an alkali metal salt and with a silicon compound and calcining resultant mixture at a temperature greater than about 1100.degree. C.

Abstract: This invention relates to ethylene oxide catalysts comprising silver, alkali metal promoters supported on a carrier, which carrier is prepared by a process which comprises mixing an aluminum compound with a tin compound and calcining resultant mixture at a temperature greater than about 1100.degree. C.