活性白土法精制苯酚研究

采用活性白土法对提高异丙苯法合成的苯酚产品的质量进行了研究 ,探讨了使苯酚硫酸着色率(UVT)值达到指标要求 (≥ 90 % )的工艺条件。通过对苯酚原料的GC MS分析和对原料与产品的UVT及总酮量分析定性说明影响UVT值达标的主要杂质为沸点高于苯酚的酮类化合物。以活性白土为催化剂研究了反应温度、反应时间及催化剂用量等因素对提高苯酚UVT值的影响。结果表明在反应温度为 12 0℃ ,反应时间为 1h、催化剂用量为苯酚质量的 2 %条件下 ,反应产物经适当减压精馏可得到使UVT值达到 95 %以上的高纯度苯酚

Study on Purifying Phenol with Activated Acidic Earth

The purification of phenol produced from cumene was investigated with activated acidic earth method in order to obtain a kind of highly qualified phenol.The optimum conditions were experimentally explored for increasing the index of sulphonated pigmentation ratio (that is UVT) of phenol up to or surpass 90%.The impurities affecting the index of UVT of phenol were found by GC MS analyses and total ketones analyses of phenol,which are mainly ketones compounds with its boiling point higher than that of phenol.The activated acidic earth was used as a catalyst to investigate the influence factors on the UVT of phenol,such as the reaction temperature,reaction time and the amounts of the catalyst used.The experimental results show that when the catalyst amounts used is 2% of phenol and the reaction time is 1 hour at 120℃,the highly qualified phenol with UVT of above 95% may be obtained through a suitable distillation process after reaction.