Abstract:
PROBLEM TO BE SOLVED: To provide an improved method for the hydroformylation of a compound having at least ethylenically unsaturated double bond. SOLUTION: The hydroformylation method uses at least one kind of a complex of a metal of VIII sub-group having at least one kind of a phosphorus- containing compound, which has two groups each having one P atom bonded to the respective phenyl rings of a molecular skeleton derived from bisphenol A, as a ligand.
Abstract:
The invention relates to a method for producing addition products to the C=C double bond of ethylenic unsaturated compound in the presence of a catalyst, comprising at least one complex of a metal of the VIII sub-group with at least one bisphospholyl metallocene as ligand. The invention further relates to novel catalysts with phosphametallocenes as ligands.
Abstract:
The invention relates to a method for producing optically active 2-methylalkane-1-ol of general formula (III), comprising the following steps: (i) carbonyl-selective reduction of 2-methylalk-2-en-1-al of general formula (I) to 2-methylalk-2-en-1-ol of general formula (II), (ii) enantioselective hydration of 2-methylalk-2-en-1-ol to give the compound of general formula (III), (iii) increasing the optical yield of the optically active 2-methylalkane-1-ol (III) obtained in step (ii) by way of a lipase-catalyzed acylation reaction, whereby R represents C 1 -C 10 alkyl.
Abstract:
The invention relates to a method for the continuous production of aldehydes comprising between 5 and 21 carbon atoms, by the isomerising hydroformylation in a homogenous phase of olefin compositions comprising between 4 and 20 carbon atoms and containing alpha-olefins and olefins with internal double bonds, by means of a synthesis gas, in the presence of a homogeneous rhodium catalyst that is complexed with an organophosphorus ligand containing oxygen atoms and/or nitrogen atoms and a free ligand. Said production is carried out at high temperature and high pressure in a multi-stage reaction system consisting of at least two reaction zones. According to said method, the olefin composition is first reacted in a first reaction zone or a group of several first reaction zones at a total pressure of between 10 and 40 bar, using a synthesis gas with a CO/H2 molar ratio of between 4:1 and 1:2 until a 40 to 95 % conversion of the alpha-olefins is obtained. The hydroformylation product from the first reaction zone or group of several first reaction zones is then reacted in a subsequent reaction zone or group of several reaction zones at a total pressure of between 5 and 30 bar, using a synthesis gas with a CO/H2 molar ratio of between 1:4 and 1:1000. The total pressure in the subsequent reaction zone or zones is respectively 1 to (G1-Gf) bar lower than that of the preceding reaction zone, whereby G1 represents the total pressure in the respective preceding reaction zone and Gf represents the total pressure in the respective reaction zone that succeeds said first reaction zone or zones, with the proviso that the difference between G1 and Gf is greater than 1 bar and the partial CO pressure in the subsequent reaction zone or zones is respectively lower than that of the preceding reaction zone.
Abstract:
The invention relates to a method for production of hydroformylated olefins, whereby a) an olefin-containing feed, carbon monoxide and hydrogen are fed into a first reaction zone and reacted in the presence of a first catalyst system, b) a liquid stream essentially comprising unreacted olefins and optionally saturated hydrocarbons is separated from the discharge from the first reaction zone, c) the liquid stream obtained in step b), carbon monoxide and hydrogen are fed into a second reaction zone and reacted in the presence of a second catalyst system.
Abstract:
The invention relates to a method for the hydroformylation of ethylenically unsaturated compounds, whereby at least one complex of a metal of subgroup VIII is used as the hydroformylation catalyst, having at least one compound containing phosphorus, arsenic, or antimony as a ligand. Each compound comprises two groups having a P, As, or Sb atom and at least two other heteroatoms, said groups being bound to a xanthene-type molecular structure. The invention also relates to novel compounds of this type and catalysts comprising at least one complex of a metal of subgroup VIII having at least one such compound as a ligand.
Abstract:
The invention relates to a method for production of a ruthenium catalyst comprising i) a bidentate phosphorous ligand or two monodentate phosphorus ligands and ii) a bidentate nitrogen ligand or two monodentate nitrogen ligands.
Abstract:
The invention relates to a method for producing optically active alkyl succinic acid monoalkyl esters of formula (I), wherein D and E independently represent H, C 1 -C 10 alkyl, RC 1 -C 10 alkyl, aryl, or alkylaryl.
Abstract:
The invention relates to phosphacyclohexanes of general formulae I and II, wherein the following designations, among others, apply: R can represent hydrogen, C1-100-alkyl, C7-20-aralkyl, C7-20-alkaryl, and C6-12-aryl; R to R can independently represent hydrogen, C1-20-alkyl, C7-20-aralkyl, C7-20-alkaryl, and C6-12-aryl; W, W' can independently represent single bonds or bridges comprising 1 to 20 carbon atoms, which can form part of a cyclic or aromatic group and can be interrupted by heteroatoms. Said phosphacyclohexanes are used as ligands in transition metal complexes of transition metals belonging to groups VIII to X of the periodic table.
Abstract:
The present invention relates to a method for the production of hydroform ylation products from olefins having at least four carbon atoms. A high amou nt of the linear Ci-olefins with terminal double bonds that are present in t he inlet comprising olefins, and also of the linear Ci-olefins having intern al double bonds are converted to hydroformylation products. The invention fu rther relates to a method for the production of 2-propylheptanol, comprising said hydroformylation method.