| 摘要 |
Described are novel processes which employ reusable aluminum catalysts in Friedel-Crafts reactions. In one aspect, a novel process for producing a Friedel-Crafts reaction product is described, the process comprising: providing, to a reactor, aromatic reactant and a catalyst system, which system is formed from constituents which comprise (i) an aluminum compound selected from at least one aluminum trihalide, alkyl aluminum halide, or aluminum trialkyl, or a mixture of any two or more of the foregoing, (ii) a salt selected from alkali metal halide, alkaline earth metal halide, alkali metal or alkaline earth metal pseudohalide, quaternary ammonium salt, quaternary phosphonium salt or ternary sulfonium salt, or a mixture of any two or more of the foregoing, and (iii) an aromatic compound which may be the same as or different from the aromatic reactant, the aluminum compound (i), the salt (ii), and the aromatic compound (iii) forming a liquid clathirate which is immiscible in the Friedel-Crafts reaction product and which exhibits Friedel-Crafts catalytic activity. In a preferred embodiment, the liquid clathrate is recovered and reused to catalyze the same or a different Friedel-Crafts reaction.
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