| 摘要 |
This invention relates to oxyalkylations which take place in the presence of solid acid catalysts. More particularly this invention relates to increasing the selectivity of such processes employing a solid acid catalyst, preferably a polyfluorosulfonic acid catalyst, in which an hydroxylic compound reactant reacts with an alkylene oxide reactant to produce a desired mono-oxyalkylated product which tends to react with the alkylene oxide to produce an undesired second product. The improvement comprises the steps of (1) vaporizing the hydroxylic compound in a reflux zone, (2) passing vaporized hydroxylic compound through a catalyst zone to a condenser wherein vaporized hydroxylic compound is condensed, (3) returning condensed hydroxylic compound to the catalyst zone and in the catalyst zone contacting condensed hydroxylic compound with vaporized hydroxylic compound and the alkylene oxide in the presence of a solid insoluble acidic catalyst at reaction conditions whereby the desired mono-oxyalkylated derivative is formed, (4) passing reaction products and unreacted condensed hydroxylic compound to the reflux zone, and (5) recovering the mono-oxyalkylated derivative.
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