Abstract: The invention provides a process for the isomerization of C4 to C9 olefins having a terminal double bond to the corresponding olefins having an internal double bond, wherein a heterogeneous catalyst which comprises a silicon-aluminium mixed oxide composition is used.

Abstract: A computer-implemented method of modifying a rail vehicle path provided by a graphical timetable application. A graphical timetable is displayed with a first dimension representing time and a second dimension representing a location of the rail vehicle. A first user input selects a rail vehicle path represented by a line graph displayed as part of the graphical timetable. To allow for easy-to-use modification of the rail vehicle path, a second user input selects a stopping element representing a stopping point of the rail vehicle path and a first drag user input drags the stopping element in the first dimension, thereby changing the time of the stopping point, and/or in the second dimension, changing the location of the stopping point. A third user selection selects a starting point of the rail vehicle path and a second drag user input drags the starting element in the time dimension and/or in the location dimension.

Abstract: A catalyst for the total hydrogenation of an olefin-containing hydrocarbon stream can be made. The catalyst has a support material and platinum as a catalytically active metal. A process for the total hydrogenation of an olefin-containing hydrocarbon stream in at least one reactor with addition of hydrogen and using the catalyst can be performed.

Abstract: The invention relates to a method for producing cyclododecanone (CDON). During the production, contaminated cyclododecane (CDAN) is produced. This can be separated from CDON by distillation (CDAN-containing fraction). The separation of CDAN and impurities such as 13-oxabicyclo [7.3.1]tridecane occurs by crystallizing out CDAN from the CDAN-containing fraction.

Abstract: A method is useful for the continuous production of ketones from a compound with at least one epoxide group in at least one fixed bed reactor. A catalyst composition is used with at least one noble metal and at least one metal oxide. To reduce the proportions of high-boilers which form in the reaction, an inert gas is introduced so that a carbon monoxide partial pressure of 50 mbar or less is set in the reactor.

Abstract: A method is useful for the continuous production of ketones from a compound with at least one epoxide group in at least one fixed bed reactor. A catalyst composition is used with at least one noble metal and at least one metal oxide. To reduce the proportions of high-boilers which form in the reaction, an inert gas is introduced so that a carbon monoxide partial pressure of 50 mbar or less is set in the reactor.

Abstract: The present invention relates to a method for the reactivation of homogeneous catalyst systems from organic reaction mixtures. The catalyst systems are suitable for the oxidation of organic compounds such as, for example, cyclododecene. The reactivation is carried out using an aqueous base.

Abstract: A microbial cell, which is genetically modified to increase the expression relative to the corresponding genetically unmodified cell of an AlkB alkane hydroxylase (Eb) having an amino acid sequence at least 95% identical with the amino acid sequence of SEQ ID NO: 1 and a wax-ester synthase (Ef) having an amino acid sequence at least 95% identical with the amino acid sequence of SEQ ID NO: 2. The cell does not have a genetic modification that increases formation of a carboxylic acid or a carboxylate ester from a simple carbon source.

Abstract: The present invention relates to a process for producing cycloalkenamer-containing compositions. The polymerization of cycloalkenamer is stopped by addition of alkyl vinyl ethers. This is followed by a membrane filtration. This type of production affords polyalkenamers that are thermally stable at 180° C.

Abstract: The present invention provides an apparatus comprising a feed arranged below the middle of the apparatus, a quenching agent inlet arranged above the feed, an outlet arranged below the feed and a draw arranged above the quenching agent inlet, the apparatus having a region provided with one or more packing elements, wherein at least one means which ensures the formation of a liquid layer having a height of at least 1 cm is present between the quenching agent inlet and a packing element present between the quenching agent inlet and feed. The present invention also provides a process for preparing acrylic acid, which includes a step of oxidizing acrolein, wherein the reaction mixture obtained in this oxidation is contacted with water as quenching agent in an inventive apparatus, and a composition obtainable as bottom product in the process according to the invention, comprising acrylic acid and water.

Abstract: The invention relates to a method for producing cyclododecanone (CDON). During the production, contaminated cyclododecane (CDAN) is produced. This can be separated from CDON by distillation (CDAN-containing fraction). The separation of CDAN and impurities such as 13-oxabicyclo [7.3.1]tridacane occurs by crystallizing out CDAN from the CDAN-containing fraction.

Abstract: The present invention relates to a method for the reactivation of homogeneous catalyst systems from organic reaction mixtures. The catalyst systems are suitable for the oxidation of organic compounds such as, for example, cyclododecene. The reactivation is carried out using an aqueous base.

Abstract: A winding arrangement in a machine component for a rotary electrical machine (1), comprising: a plurality of slots (11); a winding (7) which is wound with a winding conductor (8) and has a plurality of coils (12) which each run through two of the slots (11), wherein coil sides, which are accommodated in the slots (11), of at least one last-wound coil (16) are exposed toward corresponding slot openings of the slots (11); and at least one fixing winding (17, 20a, 20b) which is formed by a section of the winding conductor (8) and has at least one fixing turn which runs transversely across a coil head (14) of the at least one last-wound coil (16) of the winding (7).

Abstract: There is provided a microbial cell for producing at least one omega-functionalized carboxylic acid ester from at least one alkane, wherein the cell is genetically modified to increase the expression relative to the wild type cell of (i) Enzyme E1 capable of converting the alkane to the corresponding 1-alkanol; (ii) Enzyme E2 capable of converting the 1-alkanol of (i) to the corresponding 1-alkanal; (iii) Enzyme E3 capable of converting the 1-alkanal of (ii) to the corresponding alkanoic acid; (iv) Enzyme E4 capable of converting the alkanoic acid of (iii) to the corresponding alkanoic acid ester; and (iv) Enzyme E5 capable of converting the alkanoic acid ester of (iv) to the corresponding omega-hydroxy-alkanoic acid ester, and wherein the cell does not comprise a genetic modification that increases the expression relative to the wild type cell of at least one of the following enzymes E20-E24 selected from the group consisting of: E20 Acyl-ACP thioesterase, of EC 3.1.2.14 or EC 3.1.2.

Abstract: A homogeneous catalyst system is removed from a reaction mixture of two liquid phases by separating the two liquid phases with a membrane having at least one separation-active layer in such a way that the homogeneous catalyst system is at least partially concentrated in a membrane retentate; wherein the reaction mixture contains at least one partially epoxidized cyclic unsaturated compound having twelve carbon atoms; and wherein the membrane separation-active layer contains crosslinked a silicone acrylate and/or polydimethylsiloxane and/or polyimide.

Abstract: A catalyst composition is useful for producing a ketone from a compound containing at least one epoxide group, and the catalyst composition contains at least one precious metal; and at least one mixed oxide; wherein the mixed oxide contains zirconium dioxide and silicon dioxide; wherein the precious metal is supported and the support is not entirely made of the mixed oxide; and wherein a mass ratio of zirconium dioxide to silicon dioxide in the mixed oxide is 86:14 to 99.9:0.1.

Abstract: An apparatus for the epoxidation of a cyclic unsaturated C12 compound with hydrogen peroxide is provided. The apparatus includes a reactor for carrying out the reaction, wherein the walls of the reactor are at least partially furnished with a separation-active layer of crosslinked silicone acrylates and/or polydimethylsiloxane.

Abstract: Cyclododecanone (CDON) is prepared by epoxidizing cyclododecene (CDEN) to epoxycyclododecane (CDAN epoxide), and rearranging the CDAN epoxide to CDON to obtain a mixture comprising said CDON and cyclododecane (CDAN), wherein CDAN is separated from the CDON-containing mixture and oxidized to CDON.

Abstract: Cyclododecanone (CDON) is prepared by epoxidizing cyclododecene (CDEN) to epoxycyclododecane (CDAN epoxide), and rearranging the CDAN epoxide to CDON to obtain a mixture comprising said CDON and CDEN, wherein CDEN is separated from the CDON-containing mixture and sent to the epoxidation to CDAN epoxide in step a.

Abstract: The invention relates to a device comprising a feed which is arranged below the center of the device, a quenching agent inlet which is arranged above the feed, an outlet which is arranged below the feed, and a discharge which is arranged above the quenching agent inlet, said device having a region provided with one or more packets between the quenching agent inlet and the feed. The device is characterized in that at least one means is provided between the quenching agent inlet and a packet provided between the quenching agent inlet and the feed, said means ensuring the formation of a liquid layer with a height of at least 1 cm.