申请人:ALBEMARLE CORPORATION
公开号:EP0838447A1
公开(公告)日:1998-04-29
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 clathrate 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.
描述了在弗里德尔-卡夫斯反应中采用可重复使用的铝催化剂的新型工艺。在一个方面,描述了一种生产 Friedel-Crafts 反应产物的新型工艺,该工艺包括(iii)与芳香族反应物相同或不同的芳香族化合物,铝化合物(i)、盐(ii)和芳香族化合物(iii)形成的液态凝块与 Friedel-Crafts 反应产物不相溶,具有 Friedel-Crafts 催化活性。在一个优选的实施方案中,液态凝块被回收并重新用于催化相同或不同的 Friedel-Crafts 反应。