Abstract: The present invention relates to a process for preparing hydroformylation products of olefins having at least four carbon atoms, in which a high proportion of both the linear Ci-olefins having a terminal double bond comprised in the olefin-comprising feed used and of the linear Ci-olefins having an internal double bond is converted into hydroformylation products. Furthermore, the invention relates to a process for preparing 2-propylheptanol which comprises such a hydroformylation process.

Abstract: The present invention relates to a process for the pretreatment of hydroamination catalysts, wherein the hydroamination catalyst is brought into contact with an ammonia-comprising mixture before the reaction of olefins with ammonia, a primary or secondary amine, with the ammonia-comprising mixture comprising less than 40% by weight of olefin The invention further relates to a process for preparing alkylamines by reaction of olefins with ammonia, primary or secondary amines over a hydroamination catalyst, wherein the hydroamination catalyst is pretreated according to the invention before the reaction of the olefins by bringing the hydroamination catalyst into contact with an ammonia-comprising mixture comprising less than 40% by weight of olefin.

Abstract: A process for preparing a primary amine with a tertiary alpha-carbon atom by reacting a tertiary alcohol with ammonia in the presence of a heterogeneous catalyst, by performing the reaction in the presence of a non-microporous, non-zeolitic aluminosilicate as a catalyst, where the aluminosilicate has a molar Al/Si ratio in the range from 0.1 to 30.

Abstract: The present invention relates to a process for preparing olefin codimers, the olefin codimers which can be obtained by this process, a process for preparing alcohols in which such olefin codimers are subjected to hydroformylation and subsequent hydrogenation, the alcohol mixtures which can be obtained in this way and their use.

Abstract: A process for preparing a primary amine with a tertiary alpha-carbon atom by reacting a tertiary alcohol with ammonia in the presence of a heterogeneous catalyst, by performing the reaction in the presence of a non-microporous, non-zeolitic aluminosilicate as a catalyst, where the aluminosilicate has a molar Al/Si ratio in the range from 0.1 to 30.

Abstract: The present invention relates to a process for the pretreatment of hydroamination catalysts, wherein the hydroamination catalyst is brought into contact with an ammonia-comprising mixture before the reaction of olefins with ammonia, a primary or secondary amine, with the ammonia-comprising mixture comprising less than 40% by weight of olefin The invention further relates to a process for preparing alkylamines by reaction of olefins with ammonia, primary or secondary amines over a hydroamination catalyst, wherein the hydroamination catalyst is pretreated according to the invention before the reaction of the olefins by bringing the hydroamination catalyst into contact with an ammonia-comprising mixture comprising less than 40% by weight of olefin.

Abstract: Processes for preparing a C5 aldehyde and propene are disclosed, the processes comprising: (a) providing a feedstream, the feedstream comprising butane, 1-butene, 2-butene and 1,3-butadiene, the 1,3-butadiene present in the feedstream in an amount up to 1000 ppm; (b) contacting the feedstream with hydrogen and carbon monoxide in the presence of a hydroformylation catalyst to form a 2-butene-rich butane stream and a C5 aldehyde; (c) separating the 2-butene-rich butane stream and the C5 aldehyde; and (d) contacting the 2-butene-rich butane stream with ethene in the presence of a metathesis catalyst to form a propene-containing hydrocarbon stream.

Abstract: The present invention relates to a process for preparing hydroformylation products of olefins having at least four carbon atoms, in which a high proportion of both the linear Ci-olefins having a terminal double bond comprised in the olefin-comprising feed used and of the linear Ci-olefins having an internal double bond is converted into hydroformylation products. Furthermore, the invention relates to a process for preparing 2-propylheptanol which comprises such a hydroformylation process.

Abstract: A process for preparing alkylamines by reacting olefins with ammonia under hydroaminating conditions over a calcined zeolitic catalyst in an adiabatically operated reactor unit, wherein the reaction mixture comprising the starting olefin, ammonia and the corresponding alkylamine is taken off at one or more points and brought into indirect thermal contact with the reaction mixture at one or more points in the reactor unit having in each case a lower concentration of alkylamine compared to the point from which the reaction mixture was taken off, is proposed.

Abstract: The present invention relates to a process for preparing olefin codimers, the olefin codimers which can be obtained by this process, a process for preparing alcohols in which such olefin codimers are subjected to hydroformylation and subsequent hydrogenation, the alcohol mixtures which can be obtained in this way and their use.

Abstract: The disclosure involves a process for the preparation of butadiene and 1-butene. The process includes at least a first catalytic dehydrogenation of n-butane to obtain a gas stream which is followed by at least a second oxidative dehydrogenation to form a second gas stream. The second gas stream is then subjected to distillation and isomeration steps to obtain butadiene and 1-butene.

Abstract: A process for preparing 1-butene, which includes nonoxidatively, catalytically dehydrogenating n-butane to obtain a product gas stream of n-butane, 1-butene, 2-butene, butadiene, hydrogen, and secondary constituents; removing hydrogen and the secondary constituents to obtain a C4 product gas stream; separating the C4 product stream into a recycle stream of n-butane and a stream of 1-butene, 2-butene and butadiene by extractive distillation, and recirculating the recycle stream to the dehydrogenation zone; introducing the 1 -butene, 2-butene and butadiene stream into a selective hydrogenation zone and selective hydrogenation of butadiene to 1-butene and/or 2-butene to obtain a stream of 1-butene and 2-butene; introducing the 1-butene and 2-butene stream, and a circulating stream of 1-butene and 2-butene into a distillation zone and isolation of a product stream; and introducing the 2-butene-containing stream into an isomerization zone to obtain a circulating stream of 1-butene and 2-butene, and recirculating t

Abstract: Preparation of polyisobutylene having a content of terminal double bonds of more than 50% by polymerizing isobutene using a polymerization catalyst customary therefor from a technical 1-butene-, 2-butene- and isobutene-containing C4 hydrocarbon stream which may comprise up to 3000 ppm by weight, of 1,3-butadiene, by reducing the content of oxygenates in the C4 hydrocarbon stream before the polymerization of the isobutene by contacting it with an inorganic adsorbent at a pressure of from 1 to 20 bar and a temperature of from 20 to 220° C.

Abstract: A column is described for carrying out reactive distillations in the presence of a heterogeneous particulate catalyst having an ordered packing or random packings which form intermediate spaces in the column interior, the quotient of the hydraulic diameter for the gas flow through the ordered packing or the random packings and the equivalent diameter of the catalyst particles being in the range from 2 to 20, preferably in the range from 5 to 10, in such a manner that the catalyst particles are introduced into the intermediate spaces, distributed and discharged loose under the action of gravity.

Abstract: A process for preparing alkylamines by reacting olefins with ammonia under hydroaminating conditions over a calcined zeolitic catalyst in an adiabatically operated reactor unit, wherein the reaction mixture comprising the starting olefin, ammonia and the corresponding alkylamine is taken off at one or more points and brought into indirect thermal contact with the reaction mixture at one or more points in the reactor unit having in each case a lower concentration of alkylamine compared to the point from which the reaction mixture was taken off, is proposed.

Abstract: Preparation of highly reactive isobutene homo- or copolymers having Mn=from 500 to 1 000 000 by polymerizing isobutene in the liquid phase in the presence of a dissolved, dispersed or supported metal-containing catalyst complex by using, as the catalyst complex, a compound I Zn+[MXa(OR)b]n?·Lx ??(I) M metal atom from the group of boron, aluminum, gallium, indium and thallium, R each independently aliphatic, heterocyclic or aromatic hydrocarbon radicals which have in each case from 1 to 18 carbon atoms and may comprise fluorine atoms, or silyl groups comprising C1 to C18 hydrocarbon radicals, X halogen atoms, Z proton (n=1), optionally substituted ammonium (n=1) or n-valent metal cation, L neutral solvent molecules, a integer from 0 to 3, b integer from 1 to 4, where a+b=4, and x?0.

Abstract: Preparation of highly reactive isobutene homo- or copolymers with Mn=from 500 to 1 000 000 by polymerizing isobutene from technical C4 hydrocarbon streams having an isobutene content of from 1 to 90% by weight in the liquid phase in the presence of a dissolved, dispersed or supported catalyst complex, by using, as the catalyst complex, a protic acid compound I [H+]kYk?.Lx ??(I) Yk? weakly coordinating k-valent anion which comprises at least one hydrocarbon moiety, L neutral solvent molecules and x?0.

Abstract: Preparation of highly reactive isobutene homo- or copolymers having Mn=from 500 to 45 000 by polymerizing isobutene in the liquid phase in the presence of a dissolved, dispersed or supported boron-containing catalyst complex, by using, as the catalyst complex, a protic acid compound I [H+]m+1[R1R2R3B—(-Am+—BR5R6—)n—R4](m+1)?.Lx ??(I) R1 to R6 each independently aliphatic, heterocyclic or aromatic, fluorinated hydrocarbon radicals having in each case from 1 to 18 carbon atoms, or silyl groups comprising C1 to C18 hydrocarbon radicals, A nitrogen-containing bridging member which forms covalent bonds to the boron atoms via its nitrogen atoms, L neutral solvent molecules, n=0 or 1, m=0 or 1 and x is ?0.

Abstract: Process for preparing a stream consisting essentially of ethene (stream C2=), a stream consisting essentially of propene (stream C3=), a stream consisting essentially of isobutene and possibly other olefins having 4 carbon atoms (stream C4=) and a stream consisting essentially of 2-methyl-2-butene and possibly 2-butene (stream C5=), and, if appropriate, a stream which comprises other hydrocarbons (stream Cx) and may consist of a plurality of separate substreams, which comprises a metathesis step in which a C4-hydrocarbon stream comprising at least 15% by weight of 2-butenes, at least 5% by weight of isobutene and not more than 5% by weight of 1-butene (feed stream) is brought into contact with ethene in the presence of a customary metathesis catalyst and the resulting hydrocarbon stream is fractionated to give the streams C2=, C3=, C4= and, if appropriate, Cx and all or part of the stream C5= is recirculated to the metathesis step.

Abstract: Processes for preparing a C5 aldehyde and propene are disclosed, the processes comprising: (a) providing a feedstream, the feedstream comprising butane, 1-butene, 2-butene and 1,3-butadiene, the 1,3-butadiene present in the feedstream in an amount up to 1000 ppm; (b) contacting the feedstream with hydrogen and carbon monoxide in the presence of a hydroformylation catalsyt to form a 2-butene-rich butane stream and a C5 aldehyde; (c) separating the 2-butene-rich butane stream and the C5 aldehyde; and (d) contacting the 2-butene-rich butane stream with ethene in the presence of a metathesis catalyst to form a propene-containing hydrocarbon stream.