| 摘要 |
<p>The invention relates to a method for producing a product flow substantially consisting of ethene (C2=flow), a product flow substantially consisting of propene (C3=flow), a product flow substantially consisting of isobutene and, optionally of other olefins having 4 carbon atoms (C4=flow) and a product flow substantially consisting of 2-methyl-2-butene and, optionally of 2-butene (C5=flow), and optionally another product flow containing other hydrocarbons (Cx flow), optionally consisting of several individual partial flows. The inventive method comprises a metathesis step consisting in bringing a C4-hydrocarbon flow containing at least 15 % by weight 2-butene, at least 5 % by weight isobutene and at least 5 % by weight 1-butene (feeding flow) into contact with ethene in the presence of an usual metathese catalyst, the thus formed hydrocarbon flow is separated in the C2 =, C3=, C4= and optionally Cx flows and the C5= flow is partially or entirely recycled at the metathese stage.</p> |
