Abstract:
PROBLEM TO BE SOLVED: To hydrogenate polyunsaturated hydrcarbon(s) in a fluid by bringing the hydrocarbon(s) into contact with a catalyst pack in the presence of free hydrogen. SOLUTION: Polyunsaturated 2-8C hydrocarbon(s), esp. 2-8C alkyne and/or 4-8C alkynene and/or 4-8C alkadiene, is brought into contact with a catalyst pack in the presence of free hydrogen. The catalyst pack is prepared by applying an active substance as a catalyst and/or promoter to a woven mesh, knitwear or foil as support material; for example, the support may be coated with the catalytically active compound and promoter by e.g. vacuum deposition. By virtue of using the catalyst, the polyunsaturated hydrocarbon(s) can be converted to the corresponding monounsaturated hydrocarbon(s) in high selectivity and yield, and hydrogenation of isobutene does not occur.
Abstract:
The invention relates to a device for carrying out, in a substantially isothermal manner, a heterogeneously catalysed reaction in a gas phase with high heat tonality. The inventive device comprises at least one reactor chamber (101) with an inlet (131, 141) and an outlet (143). The reactor chamber is defined by heat dissipating walls, lying at a substantially constant distance of /m and good thermal conductibility; the reaction gas in the reactor chamber flows at a rate of >/= 200 m per m surface area per hour; and a heat exchange medium flows on the side of the reactor wall opposite the reactor chamber.
Abstract:
The invention relates to a method for producing aromatic hydrocarbons from a C 1 -C 4 alkane or a mixture of C 1 -C 4 alkanes. Said method is characterized in that a) an educt flow A containing a C 1 -C 4 alkane or a mixture of C 1 -C 4 alkanes is brought in contact with a catalyst, and some of the C 1 -C 4 alkane or some of the mixture of C 1 -C 4 alkanes is reacted to aromatic hydrocarbon/s, b) the product flow B resulting from step a) is separated into a low-boiling flow C containing the main portion of the hydrogen and the non-reacted C 1 -C 4 alkane or mixture of C 1 -C 4 alkanes, and a high-boiling flow D or several high-boiling flows D' containing the main portion of the obtained aromatic hydrocarbon, and c) the low-boiling flow C is fed to another process consuming C 1 -C 4 alkane, the hydrogen contained in the low-boiling flow C being optionally eliminated beforehand.
Abstract:
The invention relates to a device for carrying out, in a substantially isothermal manner, a heterogeneously catalysed reaction in a gas phase with high heat tonality. The inventive device comprises at least one reactor chamber (101) with an inlet (131, 141) and an outlet (143). The reactor chamber is defined by heat dissipating walls, lying at a substantially constant distance of /m and good thermal conductibility; the reaction gas in the reactor chamber flows at a rate of >/= 200 m per m surface area per hour; and a heat exchange medium flows on the side of the reactor wall opposite the reactor chamber.
Abstract:
The invention relates to a shell catalyst containing ruthenium as an active metal, alone or together with at least one other metal of the auxiliary group IB, VIIB or VIII of the periodical system of the elements (CAS version), and applied to a carrier containing silicon dioxide as a carrier material. The invention also relates to a method for producing said shell catalyst, and to a method for hydrogenating an organic compound containing hydrogenable groups, preferably for hydrogenating a carbocyclic aromatic group to form the corresponding carbocyclic aliphatic groups or for hydrogenating aldehydes to form the corresponding alcohols, using the inventive shell catalyst. The invention further relates to the use of the inventive shell catalyst for hydrogenating an organic compound containing hydrogenable groups, preferably for hydrogenating a carbocyclic aromatic group to form the corresponding carbocyclic aliphatic groups or for hydrogenating aldehydes to form the corresponding alcohols.
Abstract:
The invention relates to a method for producing hydrocarbons having a modified carbon skeleton by reacting aliphatic hydrocarbons a) with themselves, b) with another aliphatic hydrocarbon or c) with aromatic alkyl substituted hydrocarbons, in the presence of a metal organic catalyst or the hybrid thereof, at a temperature of between 20 - 400 DEG C and a pressure of between 0.2 - 100 bars, wherein the reaction takes place in the presence of hydrogen.
Abstract:
A catalyst comprising nickel on a TiO 2 support is obtainable by coprecipitation of nickel and at least one further metal selected from among Si, Zr, Hf, alkaline earth metals, Y, La and Ce, and optionally at least one dopant metal selected from groups 5 to 11 of the Periodic Table of the Elements, from a solution in which the corresponding metal salts are present onto a particulate TiO 2 support, subsequent drying, calcination and reduction and optionally passivation to give the nickel-containing catalyst. It is used, in particular, for the hydrogenation of nitroaromatic compounds.
Abstract:
The invention relates to a method for cleaning crude terephthalic acid by means of catalytic, hydrogenating aftertreatment using a catalyst material containing at least one hydrogenation metal applied to a carbon carrier consisting of carbon fibres. The invention also relates to a catalyst consisting of the at least one catalyst material containing the at least one hydrogenation metal applied to the carbon fibres, the BET surface of the carbon carrier being
Abstract:
The invention relates to a catalytic converter for the selective hydrogenati on of alkines and dienes in C2-C5+ olefin mixtures. Said catalytic system contains (a) a metal from the tenth group of the periodic table of elements, (b) a metal from the eleventh group of the periodic table of elements, (c) optionally, a compound of a metal of the first or second group of the periodic table of elements, whereby said metals are supported on a carrier selected from the group consisting of silicium dioxide, titanium dioxide, zirconium oxides, spinelles, zinc aluminates, zinc titanates, aluminium silicates or mixtures of said substances. The metal stemming from the eleventh group of the periodic table of elements is homogeneously distributed over the cross-section of catalyst particles. The metal stemming from the tenth group of the periodic table of elements is located at the surface-proximate edge layer of said catalyst particles. Said catalytic converter is preferably produced by applying the metal from the eleventh group is preferably applied already during the production of the carrier by dipping it into a solution of a suitable metal salt.
Abstract:
Processes for preparing amines comprising reacting an aldehyde and/or ketone with hydrogen and a nitrogen compound in the presence of a heterogeneous catalyst, wherein the heterogeneous catalyst comprises a catalyst packing prepared by applying at least one compound selected from the group consisting of catalytically active metals, compounds of catalytically active metals, and mixtures thereof to a support material selected from the group consisting of woven fabrics, knitted fabrics, foils, and combinations thereof.