摘要:
A system suitable for use as a catalyst for the hydrocyanation of olefinically unsaturated compounds, containing a) Ni(0), b) Ni(0) as a ligand complex-fixing compound containing trivalent phosphorus, c) a Lewis acid and d) a compound of formula MRn wherein M = AI or Ti, R= identical or different monovalent alkoxyl radicals, wherein several alkoxy radicals can be interbridged, also in the case where M = AI, R = identical or different alkyl radicals wherein several alkyl radicals can be interbridged or one or several alkyl radicals can be bridged by one or several of the above-mentioned alkoxy radicals, n = valency of M. The invention also relates to methods for the hydrocyanation of an olefinically unsaturationed compound in the presence of said system.
摘要:
A system suitable for use as a catalyst for the hydrocyanation of olefinically unsaturated compounds, containing a) Ni(0), b) Ni(0) as a ligand complex-fixing compound containing trivalent phosphorus, c) a Lewis acid and d) a compound of formula MRn wherein M = AI or Ti, R= identical or different monovalent alkoxyl radicals, wherein several alkoxy radicals can be interbridged, also in the case where M = AI, R = identical or different alkyl radicals wherein several alkyl radicals can be interbridged or one or several alkyl radicals can be bridged by one or several of the above-mentioned alkoxy radicals, n = valency of M. The invention also relates to methods for the hydrocyanation of an olefinically unsaturationed compound in the presence of said system.
摘要:
The invention relates to a method for the isomerization of 2-pentenenitrile to form trans-3-pentenenitrile in the presence of aluminium oxide as a catalyst. The invention is characterised in that the BET surface of the aluminium oxide is at least 50 m2/g.
摘要:
The invention relates to a method for producing a 2,2'-dihydroxy-biphenyl by the oxidative coupling of two phenol molecules, which have a hydrogen atom in an o-position, using a peroxide in the presence of water at a temperature ranging from 0 DEG C to 100 DEG C. The invention is characterized in that the production is carried out in the presence of a water-insoluble polymer, containing; a) 0.1 to 99.9 % by weight of at least one vinyl heterocyclic compound; b) 0.1 to 10 % by weight of a bifunctional cross-linker constituent; c) 0 to 99.8 % by weight of styrene or of at least one monounsaturated styrene derivative or mixtures thereof, whereby the indicated percentages by weight of the individual constituents a), b) and c) total 100 %.
摘要:
Disclosed is a method for producing aminodihalophosphines, diaminohalophosphines, triaminophosphines, phosphite diamides, aminophosphines, diaminophosphines, phosphite amide halogenides, and aminophosphine halogenides by separating an acid in the presence of an auxiliary base. Said auxiliary base b) forms a salt with an acid, which is liquid at temperatures at which the valuable product is not significantly decomposed during separation of the liquid salt, and c) the salt of the auxiliary base and the valuable product or the solution of the valuable product form two immiscible phases in a suitable solvent.
摘要:
The invention relates to phosphinite phosphites I of formula 1, 2, 3, 4, 5 or 6 and mixtures thereof, wherein R1, R2, R4 independently represent an alkyl or alkylene group with 1 to 8 carbon atoms, provided that at least one of the groups R1, R2, R4 is different from H; R5 to R22 independently represent H, an alkyl or alkylene group with 1 to 8 carbon atoms; R3 is H, methyl or ethyl; X is F, Cl or CF3, if n = 1 or 2 and X is H, if n = 0.
摘要:
The invention relates to a method for producing a 2,2'-dihydroxy-biphenyl by the oxidative coupling of two phenol molecules, which have a hydrogen atom in an o-position, using a peroxide in the presence of water at a temperature ranging from 0 °C to 100 °C. The invention is characterized in that the production is carried out in the presence of a water-insoluble polymer, containing; a) 0.1 to 99.9 % by weight of at least one vinyl heterocyclic compound; b) 0.1 to 10 % by weight of a bifunctional cross-linker constituent; c) 0 to 99.8 % by weight of styrene or of at least one monounsaturated styrene derivative or mixtures thereof, whereby the indicated percentages by weight of the individual constituents a), b) and c) total 100 %.