混甲酚的分离过程研究
发布时间：2018-11-29 08:03
【摘要】：甲酚通常是指由邻、间、对三种甲酚同分异构体组成的混合物,这三种成分均可用于生产合成香料产品,在农药、染料、医药、抗氧化剂等领域都有着非常广泛的应用。甲酚主要源于化工合成或炼焦、石油、焦油砂、油页岩干馏和城市煤气的副产品,也可通过化学方法得到,但一般得到的产物副产物较多,需将其分离,由于间甲酚和对甲酚的沸点相差比较小,使用传统的分离方法很难将其分离,国内还没有实现甲酚分离的工业化,因此对甲酚分离工艺的研究有着非常重要的意义。本文首先制备了几种对水稳定的带-SO_3H官能团的磺酸类酸性离子液体催化剂,通过用红外光谱(IR)、热重分析(TG)、核磁共振氢谱(HMNR)等表征手段对制备的离子液体进行了表征,并对离子液体的合成条件进行了优化,得出制备离子液体的最佳反应温度为60℃,反应时间为4h,搅拌速率为1500r/min。其次考查了离子液体种类及其组成对甲酚烃化反应的影响,结果表明,当离子液体催化剂选用[HO_3SC_3NEt_3]Cl-ZnCl_2时,异丁烯转产率最高,并且当离子液体[HO_3SC_3NEt_3]Cl-ZnCl_2中ZnCl_2的摩尔分数为84%时,催化效果最好。再次,以间甲酚和对甲酚混合物为原料,在催化剂存在的条件下用烃化法分离间甲酚和对甲酚的混合物,并通过实验研究了催化剂种类、反应温度、反应时间、异丁烯空速等对甲酚烃化反应的转化率和选择性的影响,然后通过正交实验得到烃化法分离间、对甲酚混合物的最优工艺条件。最后本文以减压精馏产物为原料,对脱烃化反应进行了研究,包括催化剂种类及其催化剂用量等研究,得到纯度较高的间甲酚。
[Abstract]:Cresol is usually a mixture of o-, m-, p-cresol isomers, which can be used to produce synthetic spices. Cresol is widely used in pesticide, dyestuff, medicine, antioxidant and so on. Cresol is mainly derived from chemical synthesis or coking, petroleum, tar sands, oil shale retorts and city gas by-products, which can also be obtained by chemical methods. Because the boiling point difference between m-cresol and p-cresol is relatively small, it is very difficult to separate m-cresol from p-cresol by traditional separation method, and the industrialization of cresol separation has not been realized in China, so the study of cresol separation technology is of great significance. In this paper, several kinds of water-stable sulfonic acid ionic liquid catalysts with SO_3H functional group were prepared. The (TG), was analyzed by IR (IR), thermogravimetric analysis. The synthesized ionic liquids were characterized by (HMNR) and optimized. The optimum reaction temperature was 60 鈩，
本文编号：2364422
[Abstract]:Cresol is usually a mixture of o-, m-, p-cresol isomers, which can be used to produce synthetic spices. Cresol is widely used in pesticide, dyestuff, medicine, antioxidant and so on. Cresol is mainly derived from chemical synthesis or coking, petroleum, tar sands, oil shale retorts and city gas by-products, which can also be obtained by chemical methods. Because the boiling point difference between m-cresol and p-cresol is relatively small, it is very difficult to separate m-cresol from p-cresol by traditional separation method, and the industrialization of cresol separation has not been realized in China, so the study of cresol separation technology is of great significance. In this paper, several kinds of water-stable sulfonic acid ionic liquid catalysts with SO_3H functional group were prepared. The (TG), was analyzed by IR (IR), thermogravimetric analysis. The synthesized ionic liquids were characterized by (HMNR) and optimized. The optimum reaction temperature was 60 鈩，
本文编号：2364422
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