| 摘要 |
The prodn. of 2-, 3-, 4-, 5- and 6-phenyl alkanes, by alkylation of benzene using at least one 9-16C linear olefin in the presence of a solid zeolite catalyst. The catalyst comprises a matrix and a de-aluminised HY zeolite contg. hardly any extra-cellular Al, and having a Na content less than 0.25%, a cell parameter less than 24.55x10xpower-10 m; and a BET surface area greater than 300 m2/g. The process is carried out at 1-10 MPa and a temp. less than 300 deg.C, spatial velocity of 0.5-50 and a benzene:olefin(s) molar ratio of 1-20. USE/ADVANTAGE - The phenyl-alkanes obtainable are used in the formulation (after sulphonate) of biodegradable detergents. The present invention overcomes safety and disposal problems which are incurred in the usual techniques using HF or AlCl3-based catalysts. The latter techniques also involve difficulties in sepn. of catalyst from the reaction prods. The new catalysts are very active, resistant to de-activation and give selectivities similar to those obtd. in classical processes.
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