Patent application number | Description | Published |
20150224488 | STABLE LONG-TERM METHOD FOR PRODUCING C5-ALDEHYDES - The invention relates to a process for preparing aldehydes having five carbon atoms, in which an input mixture containing 10% by weight to 50% by weight of linear butenes and less than 5% by weight of 1-butene is hydroformylated with synthesis gas in the presence of a catalyst system comprising rhodium and at least one bisphosphite ligand, wherein the hydroformylation is effected in a reactor from which, over an operating period, a cycle gas containing at least a portion of the products and unconverted reactants from the hydroformylation is continuously drawn off and partly condensed, and uncondensed components of the cycle gas are recycled into the reactor, and wherein, after the operating period has expired, the hydroformylation is stopped, the reactor is freed of reaction residues and the hydroformylation is restarted. It is based on the problem of making such a process more economically viable. The problem is solved by using a bisphosphite of the formula (1) and/or (2) as ligand, extending the operating period to more than 8000 h, and not separating solid reaction residues out of the reactor during the course of the operating period. | 08-13-2015 |
20150225435 | PREPARATION OF 6,6'-((3,3'-DI-TERT-BUTYL-5,5'-DIMETHOXY-[1,1'-BIPHENYL]-2,2'-DIYL)BIS(OX- Y))BIS(2,4,8,10-TETRAMETHYLDIBENZO[D,F][1,3,2]DIOXAPHOSPHEPINE) - A process for preparing 6,6′-((3,3′-di-tert-butyl-5,5′-dimethoxy-[1,1′-biphenyl]-2,2′-diyl)bis(oxy))bis(2,4,8,10-tetramethyldibenzo[d,f][1,3,2]dioxaphosphepine) is provided. | 08-13-2015 |
20150239814 | PROCESS FOR PHOTOCATALYTIC ACCEPTOR-FREE DEHYDROGENATION OF ALKANES AND ALCOHOLS - A process for photocatalytic acceptor-free dehydrogenation of alkanes and alcohols, in which an alkane or an alcohol is irradiated in the presence of a rhodium complex containing organic phosphorus(III) compounds as ligands as a catalyst, and in the presence of at least one Lewis base is provided. | 08-27-2015 |
20150239839 | PROCESS FOR PHOTOCATALYTIC ACCEPTOR-FREE DEHYDROGENATION OF HYDROCARBAZOLES AND HYDROINDOLES - A process for the photocatalytic acceptor-free dehydrogenation of hydrocarbazoles and hydroindoles is provided, wherein a hydrocarbazole or hydroindole is irradiated in the presence of a catalyst that is a rhodium complex containing organic phosphorus(III) compounds as ligands. | 08-27-2015 |
20150266008 | MIXTURE OF DIFFERENT ASYMMETRICAL BISOPHOSPHITES AND USE THEREOF AS A CATALYST MIXTURE IN HYDROFORMYLATION - The invention relates to a mixture of unsymmetric bisphosphites, to a process for preparation thereof, to the reaction thereof with metals to give mixtures comprising complexes of the bisphosphites and the metal, and to the use thereof as a catalytically active composition in hydroformylation reactions, and also to the hydroformylation reaction itself. | 09-24-2015 |
20150273455 | MIXTURES OF CONSTITUTIONALLY ISOMERIC BISPHOSPHITES - The invention relates to mixtures of constitutional isomer bisphosphites of formulae (1a) and (2a), to a method for the production thereof, to the reaction thereof with metals to form mixtures containing complex compounds of the constitutional isomer bisphosphites of formulae (1a) and (2a) and the metal, and to the use thereof as a catalytically active composition in hydroformylation reactions. Said hydroformylactically active compositions comprises, in addition to the complex compounds of metal and the constitutional isomer bisphosphites of formulae (1a) and (2a), non-bound bisphosphites of the constitutional isomer bisphosphites of formulae (1a) and (2a) and at least one additional component. | 10-01-2015 |
20150274627 | BISPHOSPHITE MIXTURE AND USE THEREOF AS A CATALYST MIXTURE IN HYDROFORMYLATION - The invention relates to a mixture of bisphosphites, to a process for preparation thereof, and to the reaction thereof with metals to give mixtures comprising complexes of the constitutionally isomeric bisphosphites and the metal, and to the use thereof as a catalytically active composition in hydroformylation reactions, and also to the hydroformylation reaction itself. | 10-01-2015 |
20150290633 | ASYMMETRICAL BISPHOSPHITE - An unsymmetric bisphosphite of the formula (1) | 10-15-2015 |