Abstract:
PROBLEM TO BE SOLVED: To provide a method for oxychlorination of ethyene on a fixed bed catalyst in which the oxychlorination can be carried out without additional particles of an inert diluting material even at a high space velocity in a reactor. SOLUTION: This method is to produce 1,2-dichloroethane by the oxychlorination of ethene in the presence of a copper-containing fixed bed catalyst comprising a bed essentially consisting of catalyst particles comprising, at least partially, a support material impregnated with an active component and, if desired, a promoter and the method is characterized in that the catalyst bed comprises essentially no separate inert material for dilution.
Abstract:
PROBLEM TO BE SOLVED: To reduce the residual content of an unsaturated compound after hydrogenation by using a catalyst containing a metal having the hydrogenation activities on an alumina carrier and representing the reflection of a specified X-ray refraction pattern as the catalyst used in the case of hydrogenating selec tively the unsaturated compound in hydrocarbon flows. SOLUTION: When an unsaturated compound in hydrocarbon flows containing the unsaturated compound is selectively hydrogenated by using a catalyst, the catalyst having at least a metal of one kind provided with hydrogenation activities on an alumina carrier and representing the reflection of the X-ray refraction pattern corresponding to the lattice face interval in the state of not being used represented by a separate table is used. As the metal of one kind provided with hydrogenation activities or a plurality of metals provided with hydrogenation activities, one kind or a plurality of kinds of metals selected from group VIII, group IX or group X of the periodical table are used as the metal provided with the hydrogenation activities. As the metal provided with hydrogenation activities, preferably a platinum and/or a palladium is used.
Abstract:
PROBLEM TO BE SOLVED: To simply obtain the subject compound by reacting ammonia or a primary or secondary amine with an olefin in the presence of a specific condition catalyst. SOLUTION: This amine of formula I (R -R are each H, a 1-20C alkyl, a 2-20C alkenyl, etc.) is obtained by reacting an olefin of formula II, such as isobutene, diisobutene or cyclopentene, with ammonia, a primary amine or secondary amine of formula III at 200-350 deg.C at a pressure of 100-300 bars in the presence of a heterogeneous catalyst. A catalyst suitable for the amination of the olefin is effectively one or more of the oxides of group IVB or VIB elements in the periodic table, especially advantageously 5-20wt.% of a heterogeneous catalyst containing 5-15wt.% of tungsten and 8-25wt.% of zirconium on a carrier. The reaction exhibits a high selectivity and a high yield. The catalyst is further simply and easily recycled.
Abstract:
Verfahren zur Herstellung von Aminen der allgemeinen Formel I in der R ,R ,R ,R ,R ,R : Wasserstoff, C1- bis C20-Alkyl, C2- bis C20-Alkenyl, C2- bis C20-Alkinyl, C3- bis C20-Cycloalkyl, C4- bis C20-Alkyl-cycloalkyl, C4- bis C20-Cycloalkyl-alkyl, Aryl, C7- bis C20-Alkylaryl oder C7- bis C20-Aralkyl, R und R : gemeinsam eine gesättigte oder ungesättigte C3- bis C9-Alkylendikette und; R oder R : C21- bis C200-Alkyl, C21- bis C200-Alkenyl oder gemeinsam eine C2- bis C12-Alkylendikette bedeuten, durch Umsetzung von Olefinen der allgemeinen Formel II in der R , R , R und R die oben genannten Bedeutungen haben, mit Ammoniak oder primären oder sekundären Aminen der allgemeinen Formel III in der R und R die oben genannten Bedeutungen haben, bei Temperaturen von 200 bis 350°C und einem Druck von 100 bis 300 bar in Gegenwart eines Heterogenkatalysators, indem man Oxide der Gruppen IVB, VIB oder deren Gemische auf Trägern als Heterogenkatalysatoren einsetzt.
Abstract:
A PROCESS FOR HYDROGENATING AN ORGANIC COMPOUND WHICH HAS AT LEAST ONE CARBONYL GROUP, IN WHICH THE ORGANIC COMPOUND IS BROUGHT INTO CONTACT IN THE PRESENCE OF HYDROGEN WITH A SHAPED ARTICLE WHICH CAN BE PRODUCED IN A PROCESS IN WHICH (i) AN OXIDIC MATERIAL COMPRISING COPPER OXIDE, ALUMINUM OXIDE AND AT LEAST ONE OF THE OXIDES OF LANTHANUM, TUNGSTEN, MOLYBDENUM, TITANIUM OR ZIRCONIUM IS PREPARED, (ii) POWDERED METALLIC COPPER, COPPER FLAKES, POWDERED CEMENT, GRAPHITE OR A MIXTURE THEREOF IS ADDED TO THE OXIDIC MATERIAL, AND (iii) THE MIXTURE RESULTING FROM (ii) IS SHAPED TO A SHAPED ARTICLE.
Abstract:
THE PRESENT INVENTION RELATES TO A PROCESS FOR PREPARING POLYTETRAHYDROFURAN, POLYTETRAHYDROFURAN COPOLYMER, DIESTER OR MONOESTER BY POLYMERIZING TETRAHYDROFURAN IN THE PRESENCE OF AT LEAST ONE TELOGEN AND/OR COMONOMER AND OF AN ACIDIC HETEROGENEOUS CATALYST BASED ON ACTIVATED SHEET OR MIXED METAL OXIDES IN A FLUIDIZED BED.
Abstract:
La presente invención se refiere a catalizadores que contienen metales nobles sobre un soporte de óxido de aluminio y a procedimientos para la hidrogenación selectiva de compuestos insaturados en corrientes hidrocarbonadas que los contienen y al empleo de estos catalizadores.
Abstract:
A PROCESS FOR THE CATALYTIC HYDROGENATION OF A CARBONYL COMPOUND OR OF A MIXTURE OF TWO OR MORE CARBONYL COMPOUNDS IN THE PRESENCE OF A CATALYST WHICH COMPRISES AN INORGANIC SUPPORT CONTAINING TIO2, AND AS ACTIVE COMPONENT COPPER OR A MIXTURE OF COPPER AND AT LEAST ONE OF THE METALS SELECTED FROM THE GROUP OF ZINC, ALUMINUM, CERIUM, A NOBLE METAL AND A GROUP VIII METAL, WHEREIN THE COPPER SURFACE AREA DOES NOT EXCEED 10 M2/G.
Abstract:
Gas phase dehydration of butan-1,4-diol (I) to gamma -butyrolactone (II) is carried out in the presence of a catalyst (III) containing copper (Cu), which contains 4-40 wt.% Cu and 0-5 wt.% sodium oxide (Na2O) on a support of 80-100 wt.% silica (SiO2) and 0-20 wt.% calcium oxide (CaO). Also claimed is catalyst (III) per se.
Abstract:
Unsaturated cyclic ethers are produced from diols in high yield and with low hydrogenated byproduct formation, by use of a supported cobalt-noble metal catalyst that has been doped with sulfur. A process for the production of unsaturated cyclic ethers (I) of formula (1) comprises reaction of a diol (II) of formula: OH-CH(R )-Y-CH(R )-CH(R )-OH (2), in the liquid phase at 150-300 degrees C, in the presence of a supported cobalt- containing catalyst (III) that has not been activated by reduction prior to use. The cobalt containing catalyst (III) is impregnated with a noble metal consisting of platinum, palladium, rhodium, iridium, ruthenium, osmium and/or rhenium on an inert carrier that is doped with sulfur. Y = -(CHR )q- or -(CHR )q-O-; R - R = H or 1-4C alkyl; q = 0-3. An Independent claim is also included for the supported cobalt catalyst (III).