Hydroformylation method and catalyst using rhodium-ruthenium dual metal and tetradentate phosphine ligand
AssigneeWuhan Catalys Technology CO., LTD
InventorXumu Zhang
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Abstract
A homogeneous catalytic reaction method and a catalyst for isomerization and hydroformylation of long-chain internal olefins are disclosed. A rhodium-ruthenium metal complex is used as a catalyst; and the ligands are tetradentate phosphine ligands. By means of the catalytic system, homogeneous internal olefin isomerization aid hydroformylation can be performed under a certain temperature and pressure to obtain aldehyde products having high normal to iso ratios. The present invention is applicable to not only long-chain internal olefins (≥C8) but also internal olefins having a carbon number less than 8.
Claims8
A catalyst comprising a rhodium complex and a ruthenium compound, wherein the rhodium complex is formed by complexing a rhodium compound with a biphenyl tetraphosphine ligand, and the ruthenium compound does not complex with the biphenyl tetraphosphine ligand, the rhodium compound and the rhodium complex.
A reaction method for isomerization and hydroformylation of internal olefins, comprising:
- first, under inert gas protection, transferring certain amount of a complexed rhodium-ruthenium catalyst solution, certain amount of isopropanol as an additive, certain amount of solvent, and finally a substrate-internal olefin into a reaction flask equipped with a magnetic stirrer;
- wherein the complexed rhodium-ruthenium catalyst solution comprises a rhodium complex and a ruthenium compound, the rhodium complex is formed by complexing a rhodium compound with a biphenyl tetraphosphine ligand, and the ruthenium compound does not complex with the biphenyl tetraphosphine ligand, the rhodium compound and the rhodium complex;
- second, charging certain amount of CO and H2 with a certain pressure into a autoclave containing the reaction flask, and wherein a pressure ratio of H2 to CO is ranged between 1.5:1 and 10:1, and the total pressure is ranged from 0.2 MPa to 4 MPa:
- and placing the autoclave at oil bath temperature between 80° C. and 140° C. and stirring for 1 to 12 hours.
Dependencies are inferred from the claim text.