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
Wireless communication system and method of calling terminal
Lobularia plant named `Inlbusnowhi`
Room air conditioner and/or heat pump
Evaluating advertising strategies by simulating their application
Apparatus and methods for gas chromatography-mass spectrometry
Light emitting device array
Optical information recording medium
  Randomly Featured Patents
Digital amplifier
Perfluoroalkylsulfonamidoaryl compounds
Combination brush and flea powder dispenser
Process and apparatus for the on-line calendering of SC-A paper
Membrane gas separation
Extension for the advanced microcontroller bus architecture (AMBA)
Voice messaging system which allows a remote user to return a call without disconnecting from a telephone line
Method for steam cracking hydrocarbons
Wellhead assembly and method for an injection tubing string
Silver halide emulsion, process for preparing the same, and silver halide photographic materials containing the same