Includes synopsis.Includes bibliographical references (leaves [96]-100).There is an increasing interest in finding ways to produce on-purpose propene, due to the significant predicted propene growth in the next few years without the concomitant growth in the ethene demand, One of the technologies available is 1-butene metathesis, which describes a one-step process where isomerisation of 1-butene to 2-butene followed by cross-metathesis taking place. Products of the cross metathesis are propene and 2-pentene. In addition ethene and 3-hexene are expected as products of 1-butene metathesis