| 摘要 |
Aromatic hydroxy compounds unsubstituted in an ortho-position to the hydroxy group are alkylated by reaction with an olefine containing 2-20 carbon atoms in the presence of a catalyst comprising both an aluminium salt and an alkali-metal salt of an aromatic hydroxy compound, the atomic ratio of aluminium to alkali metal in the catalyst ranging from 5:1 to 50:1 and the alkylation being effected at 50-250 DEG C. The aluminium and the alkali-metal components of the catalyst may be derived from different aromatic hydroxy compounds but are preferably both derived from the aromatic hydroxy compound to be alkylated. The alkylation may be effected at atmospheric, reduced or raised pressure. Specified aromatic hydroxy compounds are phenolo-, m or p-cresol, xylenols, mono-o-alkylphenols and a - or b -naphthol. Specified olefines are ethylene, propylene, butylene-1 or -2, isobutylene, pentenes, hexenes, cyclopentene, cyclohexene, heptenes, octenes such as butylene dimers, and dodecenes such as butylene trimers or propylene tetramers. The aromatic hydroxy compounds may contain a small proportion of water, e.g. 0.01-0.02%. Comparative examples are given of the alkylation of phenol with isobutylene, cyclohexene and diisobutylene. Specifications 776,204 and 798,438 are referred to. |
