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Alkylarylamine prepn - by aromatic amine alkylation catalysed by aluminas with weakly acid function
Alkylarylamine prepn - by aromatic amine alkylation catalysed by aluminas with weakly acid function
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机译:具有弱酸功能的氧化铝催化的芳胺烷基化制备烷基芳基胺
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摘要
Aluminas with pka 5, measured in water, are used as alkylation catalysts for prodn. of alkylarylamines by reacting aliphatic and/or araliphatic alcohols and/or corresp. olefins with aromatic amines at 140-350 (160-280) degrees C, esp. prepn. of p-alkylation products, e.g. p-alkylanilines, useful for polymer prodn. partic. prepn. of alpha, alpha'-bis(4-N-methylaminophenyl)-p-diisopropyl-benzene from N-methylaniline and alpha, alpha'-dihydroxy-p-diisopropylbenzene. Pref. catalyst conc. in reaction mixt. is 0.1-5 (0.2-3) wt.%/total wt. of reactants.
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