| 摘要 |
<p>This invention relates to a process for the polymerization of an olefinic feedstock comprising one or more of butene-1, butene-2 and iso-butene by bringing the feedstock into contact with an ionic liquid comprising a) an aluminium compound of the formula RnAlX3-n wherein R is a C1-C6 alkyl radical, X is a halogen atom and n is 0, 1 or 2, and b) a substituted imidazolium an/or a substituted pyridinium halide such that the melting point of the ionic liquid is below the reaction temperature in the range from -50 DEG C to +100 DEG C. The polymers so produced can be used to react with alkenyl succinimides which are useful fuel and lubricating oil additives.</p> |
