| 摘要 |
<p>The production of olefins or olefin mixtures by displacement from an alkyl aluminium by means of different olefins or olefin mixtures is carried out by passing the alkyl aluminium in the liquid phase down an elongated reaction zone provided with means for ensuring a residence time for the alkyl aluminium longer than would be obtained by free fall under gravity and passing the olefin reactant in the vapour phase counter-current to the alkyl aluminium. The olefin vapour may be provided directly or may be produced in situ, the olefin being introduced with the alkyl aluminium but made to flow counter-current by a stripping gas, e.g. a lower olefin or a paraffin. A displacement catalyst may be present, e.g. active nickel on a solid carrier which may also serve as packing for the reaction zone. A variety of alkyl aluminium and olefin reactants are specified, and suitable reaction conditions, varying according to the reactants, are given.</p> |
