| 摘要 |
Process for the alkylation of aromatic hydrocarbons by reaction of an olefin with an aromatic hydrocarbon in the presence of a complex catalyst comprising a metal halide and aromatic hydrocarbons, which comprises measuring the activity of the catalyst by determination of the ratio of the meta dialkylated derivatives to the sum of ortho and para disubstituted derivatives and adding fresh metal halide in such amounts that said ratio is maintained at predetermined values. |
