Abstract: A novel monophosphite ligand having a tert-butyloxycarbonyl group is useful as a ligand in hydroformylation of an olefin.

Abstract: 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.

Abstract: A mixture containing a monophosphite ligand is useful for the catalysis of a hydroformylation reaction.

Abstract: The catalytic preparation of an aldehyde from an olefin proceeds in the presence of a monophosphite mixture.

Abstract: A novel monophosphite ligand having a tert-butyloxycarbonyl group is useful as a ligand in hydroformylation of an olefin.

Abstract: The preparation of high-quality oxo process alcohols from inconstant raw material sources is the technically demanding problem which is addressed by a process for continuously preparing an alcohol mixture, in which an input mixture which contains an olefin and has a composition that changes over time is subjected to an oligomerization to obtain an oligomerizate and at least a portion of the olefin oligomers present in the oligomerizate are hydroformylated with carbon monoxide and hydrogen in a hydroformylation in the presence of a homogeneous catalyst system to give aldehydes, at least some of which are converted to the alcohol mixture by subsequent hydrogenation. The process provides a constant plasticizer quality to be produced over a long production period and, optionally, a higher throughput with the same product quality.

Abstract: An unsymmetric bisphosphite of the formula (1) a process for preparation thereof, a reaction thereof with metals to give mixtures containing complexes of the unsymmetric bisphosphite and the metal, and a use thereof as a catalytically active composition in hydroformylation reactions, where the hydroformylation-active composition contains, as well as the complex of metal and unsymmetric bisphosphite, unbound bisphosphite and at least one further component.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A lubricant supplying device includes a feed pump that serves to pump lubricant from a lubricant reservoir to at least one lubrication point. A method for operating the lubricant supplying device includes measuring at least one operating parameter, such as temperature (T), of at least one part of a system to be lubricated and/or of the lubricant and/or of the environment. The at least one measured operating parameter (T) is supplied to a controller, where a required volumetric flow ({dot over (V)}target) of lubricant is determined based on a stored functional relationship ({dot over (V)}target=ƒ(T)) that generates the required volumetric flow ({dot over (V)}target) based upon the measured operating parameter (T). The feed pump is then actuated in order to achieve the determined, required volumetric flow ({dot over (V)}target).

Abstract: 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.

Abstract: The invention relates to the synthesis of tetraphenol-substituted structures, in particular meta-substituted xylenes. Said tetraphenol-type structures are reacted to obtain organic phosphorus compounds, in particular organophosphites. The invention further relates to the production of catalytically active compositions which contain transition metals in addition to the aforementioned organic phosphorus compounds. According to another subject matter of the invention, said catalytically active compositions are used in chemical reactions with small molecules, e.g. HCN, CO, hydrogen, and amines.

Abstract: The invention relates to a method for producing a product mixture (2) by means of the technical hydroformylation of a hydrocarbon stream (1) that contains isobutene, and for separating the product mixture (2) that is obtained, as well as to a device for the claimed method and to the use of a claimed device. The problem addressed thereby is that of providing a method and an associated device that allow the amount of high-boiling substances in the product mixture (2) to be kept as low as possible and thus the yield of the reaction to be increased. The problem is solved by the use of a nano-filtration device (M) for separating the catalyst from the product mixture (2), said device having especially high permeability to 3-methylbutanoic acid.

Abstract: The invention provides a process for preparing esters from formates and olefinically unsaturated compounds with catalysts based on palladium compounds. In addition, the invention discloses a polyphasic reaction mixture and nonyl methyl ester mixtures prepared by the process according to the invention.

Abstract: The subject matter of the present invention is a plurality of products and the use thereof as a catalytically active composition in a method for producing aldehydes.

Abstract: The present invention relates to POSS-modified ligands and to the use thereof in catalytically effective compositions in hydroformylation.

Abstract: The invention relates to a method for separating 1-butene from C4-containing hydrocarbon mixtures, comprising isobutene and 1-butene, by hydroformylation, wherein the catalytic system used is made of one of the transition metals of the group 8 to 10, preferably rhodium, and a bisphosphite ligand of the formula (I), where X is a divalent substituted or unsubstituted bisalkylene or bisarylene group having one or more heteroatom(s), Y is a divalent substituted or unsubstituted bisarylene or bisalkylene group having one or more heteroatom(s), Z is oxygen or NR9, and R1, R2, R3, R4 are identical or different, substituted or unsubstituted, linked, unlinked or condensed aryl or heteroaryl groups, and R9 is hydrogen or a substituted or unsubstituted alkyl or aryl group having one or more heteroatom(s), wherein the bisphosphite ligand of the formula (I) is used in an excess of a molar ratio of 100:1 to 1:1 to the transition metal, and that with a 1-butene conversion of more than 95% less than 5% of the present isobute

Abstract: The invention relates to the synthesis of tetraphenol-substituted structures, in particular meta-substituted xylenes. Said tetraphenol-type structures are reacted to obtain organic phosphorus compounds, in particular organophosphites. The invention further relates to the production of catalytically active compositions which contain transition metals in addition to the aforementioned organic phosphorus compounds. According to another subject matter of the invention, said catalytically active compositions are used in chemical reactions with small molecules, e.g. HCN, CO, hydrogen, and amines.

Abstract: The present invention relates to the preparation of 3-methylbut-1-ene from a hydrocarbon stream I comprising isobutene by feeding a hydrocarbon stream II which comprises at least 70% by mass of isobutene in relation to the olefins present in the hydrocarbon stream and which has been obtained from hydrocarbon stream I or is identical to it to a process step for hydroformylation in which isobutene is hydroformylated in the presence of a rhodium catalyst, hydrogenating the aldehyde obtained from the hydroformylation of isobutene to the corresponding alcohol and preparing 3-methylbut-1-ene by water elimination from the alcohol.