| 摘要 |
A process for the targeted preparation of long-chain alpha-olefins having a narrow molecular weight distribution comprises the following steps: i) Introduction of a C4-C10-olefin fraction into an isomerizing metathesis reaction, ii) Fractionation of the mixture obtained to give a) a C2-C3-olefin fraction, b) a fraction comprising olefins having the desired number of carbon atoms, c) a light fraction comprising olefins having a number of carbon atoms ranging from 4 to the integer below the number of carbon atoms of the desired fraction b) and d) a heavy fraction comprising olefins having a number of carbon atoms above that of the desired fraction b), iiii) Recirculation of the light fraction c) and, if desired, the heavy fraction d) to the isomerizing metathesis reaction i), iv) Reaction of the fraction b) with a trialkylaluminum compound in a transalkylation under isomerizing conditions, in which an olefin corresponding to the alkyl radical is liberated and the olefins used add onto the aluminum with isomerization and formation of corresponding alkylaluminum compounds, v) Reaction of the alkylaluminum compounds formed in iv) with an olefin to liberate the alpha-olefins corresponding to the alkylaluminum compounds formed in step iv).
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