text: Olefin metathesis has several industrial applications. Almost all commercial applications employ heterogeneous catalysts using catalysts developed well before the Nobel-Prize winning work on homogeneous complexes. Representative processes include:
  *The Phillips Triolefin and the Olefin conversion technology.  This process interconverts propylene with ethylene and 2-butenes. Rhenium and molybdenum catalysts are used. Nowadays, only the reverse reaction, i.e., the conversion of ethylene and 2-butene to propylene is industrially practiced, however.
  *Shell higher olefin process (SHOP) produces (alpha-olefins) for conversion to detergents.  The process recycles certain olefin fractions using metathesis. 
  *Neohexene production, which involves ethenolysis of isobutene dimers.  The catalyst is derived from tungsten trioxide supported on silica and MgO.
  *1,5-Hexadiene and 1,9-decadiene, useful crosslinking agents and synthetic intermediates, are produced commercially by ethenolysis of 1,5-cyclooctadiene and cyclooctene.  The catalyst is derived from ReO on alumina.
  *Synthesis of pharmaceutical drugs,