| 摘要 |
<p>A mixture of (a) highly unsaturated hydrocarbons having at least 2 double bonds or at least 1 triple bond (e.g. 1,3-butadiene, propadiene, vinylacetylene) and (b) hydrocarbons having 4 or more C atoms (e.g. butane, butene) is contacted in a fixed bed reactor containing a catalyst, e.g. palladium, with hydrogen gas in amount of 1 to 3 moles per mole of unsaturated hydrocarbons (a); the H2 is supplied at at least two, preferably two or three, points along the length of the vessel.
<??>Two or more vessels can be connected in series, or a single vessel can be divided into separate catalyst zones between which H2 is fed. Reaction in vapour phase is red.
<??>The method provides hydrogenation of the highly unsaturated hydrocarbons, without isomerization of olefinic double bonds which can reduce the proportion of 1-butene. </p> |
