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
Mobile communication device and method for providing positioning information
Systems and methods for universal enhanced log-in, identity document verification and dedicated survey participation
Hydrating lounge chair
Semiconductor device having a multilevel interconnect structure and method for fabricating the same
Data-conditioned encryption method
Automatic population of feature capabilities on a communication device
Antennas and their coupling characteristics for wireless power transfer via magnetic coupling
  Randomly Featured Patents
Image data filing apparatus
Image forming apparatus maintaining image density stability against humidity
Jet pump beam bolt retainer cutter
Refuge apparatus
Method and apparatus for calibrating marking position in chip scale marker
Cellular voice channel origination for vehicle communication with a call center
Process for preparing 3-chloromethylbenzo-cyclobutene
Liquid ejecting apparatus
Bead stripping device
Voice recognition apparatus and method, and recording medium