摘要:
The invention relates to a novel thermostable palladium catalyst, a method for producing the same and the use thereof in hydrogenation reactions, especially hydrogenation reactions of nitro compounds. The catalyst comprises at least one nanoparticulate palladium cluster which is coated with a zirconium oxide-containing coat that is impermeable to gases and liquids.
摘要:
La présente invention concerne un procédé de préparation d'arylamines et en particulier un procédé de préparation d'aniline et d'anilines substituées sur le noyau aromatique, à partir d'ammoniaque, dans des conditions douces, facilement industrialisables, avec de bonnes sélectivités et de bons rendements, en présence d'un système catalytique comprenant un complexe du cuivre.
摘要:
Die vorliegende Erfindung betrifft ein Verfahren zur Herstellung von aromatischen Aminen durch katalytische Gasphasenhydrierung von Nitroaromaten, wobei in einem Reaktor das Reaktandengemisch in mindestens zwei voneinander getrennten Reaktionszonen unter adiabatischen Bedingungen an Katalysatorbetten reagiert und wobei das aus mindestens einer Reaktionszone austretende Reaktandengemisch anschließend durch einen der jeweiligen Reaktionszone nachgeschalteten Wärmetauscher geleitet wird. Sie betrifft weiterhin ein Reaktorsystem zur Herstellung von aromatischen Aminen durch katalytische Hydrierung von Nitroaromaten mittels des erfindungsgemäßen Verfahrens.
摘要:
The invention relates to nitrobenzol derivatives of formula (IV) with R 1 hydrogen, halogen, -CR'(CF 3 ) 2 , wherein R' is selected from ausgewählt ist H, F or -O-C 1-4- alkyl; and R 3 -CH=CH-i-prop, -CH 2 CH 2 -t-but, -CH 2 CH 2 -i-prop and (a); or R 1 halogen, -CR'(CF 3 ) 2 , wherein R' is selected from H, F or -O-C 1-4 -alkyl; and R 3 -CH=CH-t-but, (b), (c) and (d); and to a method for producing nitrobenzene derivatives and aniline derivatives that are used to produce intermediate products for fungicidally active alkylanilides.
摘要:
Disclosed are processes for the preparation of 2-substituted indole compounds wherein the 2-substituent comprises an R 4 group, wherein R 4 is selected from the group consisting of monocyclic aromatic, polycyclic aromatic, monocyclic heteroaromatic, polycyclic heteroaromatic, 1° alkyl, and alkenyl, all of which are optionally substituted at one or more substitutable positions with one or more suitable substituents, and wherein R 4 is bonded to the 2-position of the indole ring via a C-C bond; the process comprising reacting an orthogem -dihalovinylaniline compound of the formula (I): wherein Halo comprises Br, Cl, or I; each of the one or more R 1 is independently selected from the group consisting of H, fluoro, lower alkyl, lower alkenyl, lower alkoxy, aryloxy, lower haloalkyl, lower alkenyl, -C(O)O-lower alkyl, monocyclic or polycyclic aryl or heteroaryl moiety, or R 1 is an alkenyl group bonded so to as to form a 4- to 20-membered fused monocycle or polycyclic ring with the indole ring; all of which are optionally substituted with one or more suitable substituents at one or more substitutable positions; R 2 comprises H, alkyl, cycloalkyl, aryl, heteroaryl, aryl-loweralkyl-, or heteroaryl-loweralkyl-, all of which are optionally substituted at one or more substitutable positions with one or more suitable substituents; R 3 comprises H, alkyl, haloalkyl, alkenyl, alkynyl, aryl, heteroaryl, cycloalkyl, heterocycle, aryl-(C 1-6 )alkyl-, or heteroaryl-loweralkyl-, all of which are optionally substituted at one or more substitutable positions with one or more suitable substituents; with an organoboron reagent selected from the group consisting of a boronic ester of R 4 , a boronic acid of R 4 , a boronic acid anhydride of R 4 , a trialkylborane of R 4 and a 9-BBN derivative of R 4 ; in the presence of a base, a palladium metal pre-catalyst and a ligand under reaction conditions effective to form the 2-substituted indole compound. Also disclosed are processes for the preparation of ortho-gem -dihalovinylaniline compounds. Novel compounds prepared by the processes and novel uses of the compounds are likewise disclosed.
摘要:
A process comprises contacting a product mixture with a base, optionally in the presence of a polyhydric alcohol, to produce a base-treated mixture and distilling the base-treated mixture in which the product mixture comprises an aromatic amine and a phenolic compound.
摘要:
The invention relates to a hydrogenating catalyst and a method for producing the same, whereby the catalyst can be used for hydrogenating nitro groups in nitro-aromatic compounds to the corresponding amines in the presence of water. The catalyst contains nickel on a support, is stabilised and has nickel crystallite with bimodal nickel crystallite size distribution, a nickel content of 60 to 80 percent by weight (in relation to the total mass of the catalyst) and a reduction rate of at least 70 % (after a reduction of one hour at a temperature of 100 DEG C).
摘要:
Aromatic amines, e.g. aniline, are produced by contacting a gaseous mixture containing an aromatic compound, e.g. benzene, and ammonia at an elevated temperature with a catalyst composition comprising at least one oxide of vanadium, there being, per mole of the aromatic compound, at least one mole of ammonia and a sub-stoichiometric amount of a hydrogen sink. The process may be operated in a plurality of stages and/or with sequential introduction of the reactants.
摘要:
The invention relates to a moulded, activated metallic fixed-bed catalyst having a pore volume of 0.05-1 ml/g and an outer, activated shell consisting of a sintered, small-particle catalyst alloy as well as optional catalyst promoters. The catalyst alloy has metallurgical phase domains resulting from the production of the alloy. The phase with the greatest volume has a specific interfacial density of more than 0.5 mu m .