Resources Contact Us Home
Ligand exchange process for producing alkyl diaryl phosphine rhodium carbonyl hydrides

Image Number 3 for United States Patent #4687866.

Compositions of matter are disclosed which are highly useful in hydroformylation processes. The compositions are non-charged, non-chelated bis- and tris-(alkyl diaryl phosphine) rhodium carbonyl hydrides. The substituents of the alkyl group include heteroorganic radicals containing silane, silicone, ether, ester, keto and hydroxy oxygen, phosphine oxide and phosphorus ester phosphorus, amine, amide, amine oxide and heterocyclic nitrogen groups.These compositions are highly stable and selective catalysts for the hydroformylation of olefins under certain conditions. The disclosed catalyst systems contain a large excess of phosphine ligand and employ alpha-olefin plus synthesis gas reactant mixtures having a high H.sub.2 /CO ratio at relatively low pressures. They produce mostly aldehydes derived from terminal attack on the alpha-olefin reactant. In the case of low olefins, such as butene-1, the products can be advantageously removed in a continuous manner, as distillate components from a ligand reaction mixture kept at an elevated temperature and continuously fed by an appropriate mixture of the reactants.

  Recently Added Patents
Vapor phase decarbonylation process
1,3-diiodohydantoin compound and production method thereof
Pharmaceutical powder compositions
Disk drive to enable defect margining
Load balancing in shortest-path-bridging networks
Motion control system and X-ray measurement apparatus
  Randomly Featured Patents
Glass substrate carrier with a non-contact brake assembly
Large array MMIC feedthrough
Method for fracturing circular patterns and for manufacturing a semiconductor device
Systems, methods and devices for removing obstructions from a blood vessel
Stand for electronic device
Operation controlling device and video processing system used therewith
Method and apparatus for sorting objects of ore by monitoring reflected radiation
Method of monitoring internal voltage and controlling a parameter of an integrated circuit
Electronic display panel for a selective call receiver