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
Connector interface for a cable
System and method for storing redundant information
Semiconductor device, integrated circuit and method of manufacturing an integrated circuit
Profiling activity through video surveillance
Inhibition of HRP-3 using modified oligonucleotides
Method and apparatus for reacquiring lines in a cache
System and method for converting biomass to ethanol via syngas
  Randomly Featured Patents
Ballast material and oil pollution prevention management system
YBa.sub.2 Cu.sub.3 O.sub.7-y type oxide superconductive material containing dispersed Y.sub.2 BaCuO.sub.5 phase and having high critical current density
Method for detecting a disturbance along a conductor in an electricity-distribution system of the grid type
Container for oil and vinegar
Snap in place gasket for sealing plastic pipelines and method of installation
Apparatus for production and cutting of glass fibres
Cutting tool
Breathable sole structure
Signal processing circuit
Power saving apparatus of an automatic vending machine and method thereof