| 摘要 |
Aromatic compounds having phenolic-hydroxyl, ether, mercapto, or carboxylic acid substituents are alkylated in presence of a catalyst by heating a mixture of an aromatic compound and an alkylating catalyst in a reaction zone under substantially atmospheric pressure, injecting into the mixture a liquid olefine having a boiling point at atmospheric pressure lower than the temperature in the reaction zone, and maintaining the reaction mixture at the said reaction zone temperature and at substantially atmospheric pressure during the alkylation. The mixture is prefer ably heated to 50 DEG to 150 DEG C. and the olefines used have 2 to 7 carbon atoms, preferably isobutylene is used. The examples describe alkylation of p-cresols, xylenols, phenols, thiophenols, chlorphenols and bisphenol A using isobutylene, trimethyl ethylene, propylene, pentane and 2-ethyl-pentene as alkylating agents. |
