2,4-二叔戊基苯酚合成工艺的研究

Study on Synthetic Process of 2,4-Di-ter-pentyl-Phenol

采用大孔强酸性阳离子树脂(A-35)催化剂进行了2,4-二叔戊基苯酚的合成工艺研究,考察了反应温度、进料空速、烯酚比以及反应压力对苯酚烷基化的影响。研究确定了适宜的工艺条件:进料的质量空速为0.6 h-1,反应温度为115℃,反应压力为0.6 MPa,在质量分数为30%的甲基叔戊基醚溶剂存在下,异戊烯和苯酚的物质的量比为1.5,在此条件下苯酚的单程转化率可维持在95%以上,总的选择性在95%以上。

The synthetic process of 2,4 -di -ter- pentyl -phenol with macroporous strongly acid cation exchange resin（ A - 35） was studied, and the effects of reaction temperature, feeding air speed, olefin and phenol ratio and reaction pressure on alkylation of phenol were discussed. The optimum reaction conditions were determined ：feeding mass air speed of 0. 6 h^-1, reaction temperature of 115 ℃, reaction pressure of 0. 6 MPa,and molar ratio of isopentene and phenol of 1.5, under which the once - through conversion rate of phenol could maintain over 95% and total selectivity was over 95%.