Abstract:
The present invention describes an improved catalyst and process for the selective hydrogenation of nitro aromatics, nitrosoaromatics and aromatic hydroxyl amines to their corresponding amines using gaseous hydrogen, in the presence of soluble iron compounds as a catalyst and optionally other reducible groups.
Abstract:
A novel precious metal doped porous metal catalyst is disclosed. The precious metal is present in from 0.01 to 1.5 weight percent and distributed throughout the particles of porous metal to provide a surface to bulk ratio distribution of not greater than 60. The present invention is further directed to a process of forming said doped catalyst and to improved processes of catalytic hydrogenation of organic compounds.
Abstract:
A method of preparing a 2,6 disubstituted anilines includes, reacting a 2-amino isophtha!ic acid diester with sufficient Grignard reagent R 2 CH 2 MgX to form the corresponding diol product, dehydrating the diol product to the corresponding dialkene; and hydrogenating the diol product to form the corresponding aniline. The 2,6 disubstituted anilines can be used to produce N-Heterocyciic Carbenes (NHCs). The NHCs can find application in various fields such as organic synthesis, catalysis and macromolecular chemistry. Palladium catalysts containing the NHCs are also described.
Abstract:
The invention relates to a method for hydrogenating liquid organic compounds, in particular for hydrogenating nitro compounds to obtain amines. Said method is characterised in that the hydrogen that is present in the reactor contains constituent parts of at least one gas that is inert during the hydrogenation reaction.
Abstract:
A process for ring-alkylating aniline or an aniline derivative in which aniline or an aniline derivative is reacted with an alkylating agent in the presence of an ionic liquid which includes a Lewis acid and a quaternary cation, to produce a ring-alkylated alkylaniline .or a ring-alkylated aniline derivative. The use of an ionic liquid permits convenient separation of the alkylated reaction product from the reactants.
Abstract:
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.
Abstract:
The present invention is directed to a transition metal catalyst, comprising a Group 8 metal and a ligand having the structure (I), wherein R', R' and R'' are organic groups having 1-15 carbon atoms, n = 1-5, and m = 0-4. The present invention is also directed to a method of forming a compound having an aromatic or vinylic carbon-oxygen, carbon-nitrogen, or carbon-carbon bond using the above catalyst. The catalyst and the method of using the catalyst are advantageous in preparation of compounds under mild conditions of approximately room temperature and pressure.
Abstract:
The invention relates to new arylphenyl-substituted cyclic keto-enols of the formula (I), where X is halogen, alkyl, alkoxy, alkenyloxy, alkylthio, alkyl sulfinyl, alkyl sulfonyl, halogen alkyl, halogen alkoxy, halogen alkenyloxy, nitro, cyano, or a phenyl, phenoxy, phenylthio, phenylalkoxy or phenylalkylthio which each can possibly be substituted; Y is a cycloalkyl, aryl or hetaryl which each can possibly be substituted; Z is hydrogen, halogen, alkyl, alkoxy, alkenyloxy, halogen alkyl, halogen alkoxy, halogen alkenyloxy, nitro or cyano; and CKE is one of groups (1, 2, 3, 4, 5, 6, 7 or 8), where A, B, D, G and Q to Q have the meanings given in the description. The invention also relates to several method for producing the above cyclic keto-enols and their use as pesticides and herbicides.
Abstract:
Ein Verfahren zur Herstellung von aromatischen Aminen durch Hydrierung von aromatischen Nitroverbindungen umfasst die Schritte: A) Bereitstellen eines Reaktors mit hierin enthaltenem Hydrierkatalysator; B) Zuführen von aromatischen Nitroverbindungen und Wasserstoff in den Reaktor unter Kontaktierung des Hydrierkatalysators, wobei wenigstens der Wasserstoff mittels eines Verdichters in den Reaktor zugeführt wird und der Verdichter Betriebsflüssigkeit enthält, welche den Wasserstoff zumindest teilweise kontaktiert; C) Regenerieren des Hydrierkatalysators durch Erwärmen und Kontaktieren mit Sauerstoff. Nach Schritt C) werden die Schritte D1) und/oder D2) durchgeführt: D1) Zumindest teilweises Entfernen von im Reaktor und/oder in stromabwärts mit dem Reaktor fluidisch verbundenen Anlagenteilen befindlichen Flüssigkeiten, welche zumindest teilweise während Schritt C) im Reaktor und/oder in diesen Anlagenteilen anwesend waren; D2) Zumindest teilweises Austauschen der Betriebsflüssigkeit des Verdichters, welche während Schritt C) im Verdichter und/oder in mit dem Verdichter verbundenen Rezirkulierungseinrichtungen anwesend war, gegen Betriebsflüssigkeit, welche während Schritt C) nicht im Verdichter und/oder in mit dem Verdichter verbundenen Rezirkulierungseinrichtungen anwesend war.