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Phenol Tert-Butylation Catalyzed by Zeolite H-Mordenite

机译:沸石H-丝光沸石催化的苯酚叔丁基化

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Para-tert-butyl phenol (p-TBP) and 2.4-di-tert-butyl phenol (2,4-DTBP) are widely used for the preparation of antioxidants. Zeolite catalysts showed good performance for the synthesis of o-TBP and 2.4-DTBP. in this work., zeolite H-mordenite ( HM) catalyst was prepared and the alkylation of phenol with tert-butyl alcohol over zeolite HM catalyst was investigated at different reaction conditions. It is found that-increasing temperature enhances the selectivity to p-TBP and the optimum reaction temperature for phenol conversion is 438 K. Increasing flow rate decreases phenol conversion apparently while the selectivity to p-TBP has a little increase. The suitable tert-butyl alcohol/phenol molar ratio is 2. Lower alcohol/phenol molar ratios are beneficial to p-TBP while higher ones are helpful for producing 2,4-DTBP.
机译:对叔丁基苯酚(p-TBP)和2.4-二叔丁基苯酚(2,4-DTBP)被广泛用于制备抗氧化剂。沸石催化剂对邻-TBP和2.4-DTBP的合成表现出良好的性能。在这项工作中,制备了沸石H-丝光沸石(HM)催化剂,并研究了在不同反应条件下苯酚与叔丁醇在沸石HM催化剂上的烷基化反应。发现增加温度可提高对p-TBP的选择性,苯酚转化的最佳反应温度为438K。增加流速明显降低了苯酚转化率,而对p-TBP的选择性则有少许提高。合适的叔丁醇/苯酚摩尔比为2。较低的醇/苯酚摩尔比对p-TBP有好处,而较高的对生产2,4-DTBP有帮助。

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