| 摘要 |
The process for the alkylation of arylhydroxides comprises the steps for continuously introducing a feed stream comprising a mixture of an olefinically unsaturated aliphatic hydrocarbon reactant preferably having from 4-12 carbon atoms, and an arylhydroxide reactant, each having a melting point of less than 150 DEG C., in liquid form to a reaction zone containing a porous mass of strongly acidic cation exchanging resin, alkylating the arylhydroxide with at least a portion of the hydrocarbon, continuously removing the resultant reaction stream from the reaction zone to a cooling zone, continuously cooling the reaction stream to remove heat of alkylation therefrom, continuously withdrawing from the reaction stream a portion thereof equal in volume to the amount of the feed stream combining the remainder of the cooled reaction stream with the feed stream for recirculation to the reaction zone, continuously passing the withdrawn portion to a second stage reaction zone containing a porous mass of strongly acidic cation exchanging resin, further reacting the withdrawn portion to the desired alkylated arylhydroxide and separating the desired alkylated arylhydroxide. The term "arylhydroxide" includes both mononuclear monohydroxylated aromatic hydrocarbons such as the phenols and polynuclear monohydroxylated aromatic hydrocarbons such as the naphthols. Specified phenols are phlorols, n-propyl-phenols, o-cumenol, m-and p-hydroxy-cumene, p-tert-butyl phenol, 2, 3-dimethylphenol, 2, 5-dimethylphenol, 2-ethyl-5-methylphenol, 2-methyl-5-isopropylphenol, 2-propyl -5- methylphenol, 2-isopropyl -5- methylphenol, 2, 6-dimethylphenol, 2-methyl-6-ethylphenol, 2, 6-diethylphenol, 2-methyl-6-propylphenol, 3, 4-dimethylphenol, 3-methyl-4-ethylphenol, 3, 5-dimethylphenol, 3, 5-diethylphenol, 2, 3, 5-trimethylphenol and 3, 4, 5-trimethylphenol. Specified naphthols are alpha and beta naphthol. Specified olefinically unsaturated aliphatic hydrocarbons are propylene, isobutylene, isopentene, hexenes, diisobutylene heptenes, nonenes, dodecenes. Examples are given of the reaction of phenyl and isobutylene to produce p-t-butylphenols, phenol and nonene to produce nonyl phenol, phenol and commercial di-or tri-isobutylene to produce octyl or dodecylphenol. |
