摘要:
Organometallic compounds and/or metal carbonyls are separated from their solutions in organic media with the aid of semi-permeable membranes made of aromatic polyamides.
摘要:
The present invention relates to compounds of the formula (I) ##STR1## where R.sup.1 is H or an alkyl radical having from 1 to 12 carbon atoms, R.sup.2 is a straight-chain alkylene radical having from 1 to 8 carbon atoms, an oxygen-containing alkylene radical having from 2 to 4 carbon atoms, a radical of the formula (II) or (III) ##STR2## or a cycloalkylene radical having from 3 to 10 carbon atoms, R.sup.3 is an alkyl radical having from 1 to 25 carbon atoms or an aryl radical having from 6 to 10 carbon atoms, A is a radical --COO.sup.- or --SO.sub.3 .sup.- and x=0, y=1, m=1 and n=1, or x=1, y=1, m=(1 or 2) and n=(1 or 2), or, if R.sup.2 is a radical of the formula (II) or (III), x=1, y=0, m=(0 or 1) and n=(0 or 1), and also a process for their preparation.
摘要:
The chemical compound 3,4-dimethyl-2,5,6-tris(p-sulfonatophenyl)-1-phosphanorbernadiene, a process for the preparation thereof and a process for the hydroformylation of olefinically unsaturated compounds with the use of catalysts which contain the aforementioned chemical compound.
摘要:
A novel process for the preparation of aldehydes by reacting olefins with carbon monoxide and hydrogen in the presence of a catalyst system comprised of rhodium in metallic form or as a compound and a water-soluble quaternary ammonium salt of a mono, di or trisulfonated arylphosphine.
摘要:
In a process for the preparation of 3-(4-methyl-3-cyclohexen-1-yl) butyraldehyde by hydroformylation of limonene in the presence of a catalyst containing a metal of Group VIII of the Periodic Table, the improvement wherein a rhodium carbonyl complex containing additionally a triphenyl and/or trialkyl phosphine as ligands is used as catalyst and the reaction is conducted at a pressure of 100 to 350 bars and at a temperature of 110.degree. to 160.degree. C., the triphenyl or trialkyl phosphines or mixture thereof being present in an amount of 10 to 50 moles per gram atom of rhodium in the reaction mixture.
摘要:
A process for the preparation of an aldehyde of the formula R--CH(CH.sub.3)--CHO where R is a straight-chain alkyl group having 7 to 12 carbon atoms by reaction of an olefin of the formula R--CH.dbd.CH.sub.2 where the carbon monoxide and hydrogen is described, the process being carried out in the presence of a complex phosphine containing rhodium compound as catalyst. After the reaction has been performed the reaction product is subjected to a thermal treatment at 100.degree. to 190.degree. C., if desired after previous separation of the catalyst.
摘要:
The present invention relates to a process for the preparation of aldehydes, which comprises reacting an olefinic compound having 2 to 20 carbon atoms with carbon monoxide and hydrogen, in the presence or absence of a solvent, in the presence of a catalyst comprising rhodium and a compound or a mixture of compounds of the formula (I) ##STR1## in which R.sup.1 is H or an alkyl radical having 1 to 12 carbon atoms, R.sup.2 is a straight-chain alkylene radical having 1 to 8 carbon atoms, an oxygen-containing alkylene radical having 2 to 4 carbon atoms, a radical of the formula (II) or (III) ##STR2## or a cycloalkylene radical having 3 to 10 carbon atoms, R.sup.3 is an alkyl radical having 1 to 25 carbon atoms or an aryl radical having 6 to 10 carbon atoms, A is a radical --COO.sup.- or --SO.sub.3.sup.- and x=0, y=1, m=1 and n=1, or x=0.1, y=1, m=(1 or 2) and n=(1 or 2), or, if R.sup.2 is a radical of the formula (II) or (III), x=1, y=0, m=(0 or 1) and n=(0 or 1), at a temperature from 50.degree. to 190.degree. C. and under a pressure from 0.1 to 45 MPa, and separating the reaction product off from the catalyst.
摘要:
A process for regenerating a water-soluble hydroformylation catalyst system comprising a coupler rhodium hydrogen-carbonyl complex of rhodium and compounds of the formula ##STR1## wherein Ar.sup.1 and Ar.sup.2 and Ar.sup.3 are individually phenyl or naphthyl, Y.sup.1, Y.sup.2 and Y.sup.3 are individually selected from the group consisting of alkyl and alkoxy of 1 to 4 carbon atoms, halogen, --OH, --CN, --NO.sub.2 and R.sup.1 R.sup.2 N--, R.sup.1 and R.sup.2 are individually alkyl of 1 to 4 carbon atoms, X.sup.1, X.sup.2 and X.sup.3 are individually carboxylate (--COO.sup.-) or sulfonate (--SO.sub.3.sup.-), m.sub.1, m.sub.2 and m.sub.3 are individually integers of 0 to 3, at least one of m.sub.1, m.sub.2 or m.sub.3 being equal to or greater than 1, and n.sub.1, n.sub.2 and n.sub.3 are individually integers of 0 to 5 and if appropriate in excess comprising adding maleic acid, fumaric acid or olefinically unsaturated compounds of formula ##STR2## wherein X is selected from the group consisting of O, S, -- ##STR3## or ##STR4## and R.sup.3, R.sup.4 and R.sup.5 are individually hydrogen, or alkyl or aryl to an aqueous solution of the catalyst system in an amount sufficient to remove sulfonated or carboxylated alkyl-arylphosphanes.
摘要:
The preparation of aldehydes by hydroformylation of olefinically unsaturated compounds. The reaction is carried out in the presence of a catalyst system which contains rhodium and an ammonium salt of a sulfonated phosphorous acid triester which is soluble in organic media.
摘要:
A process for separating rhodium from mixtures thereof, comprising extracting said rhodium with an aqueous solution of a rhodium complexing agent and a solubilizer. A process for preparing aldehydes in the presence of both the complexing agent and the solubilizer is also set forth. The solubilizer is generally selected from salts of carboxylic acids having 8-20 carbon atoms, alkyl sulfonates, alkyl aryl sulfonates, amines and quaternary ammonium compounds of Formula II ##STR1## wherein A is alkyl, alkoxy, hydroxyalkyl, aryl having 6-25 carbon atoms, or R.sup.7 CONHCH.sub.2 CH.sub.2 CH.sub.2 --wherein R.sup.7 is alkyl having 5-11 carbon atoms; B is an alkyl having 1-25 carbon atoms, an aryl having 6-25 carbon atoms, or an .omega.-hydroxy alkyl having 1-4 carbon atoms; C and D are each independently an alkyl or .omega.-hydroxy alkyl having 1-4 carbon atoms or form, together with each other and the bridging N, a 5 or 6 membered heterocyclic ring; E is a halide, sulfate, borate, sulfonate, lactate or citrate; and p is the number of charges on E. The rhodium complexing agent is preferably a triaryl phosphine carboxylate or sulfonate.