耐高温强酸性阳离子交换树脂催化桐油酯化反应性能研究

Catalytic performance of high temperature-resistant strong acid cation exchange resin in esterification of tung oil

采用自主开发的耐高温强酸性阳离子交换树脂为催化剂,对其在桐油酯化反应中的催化性能进行了研究。用ASAP2400吸附仪表征了耐高温强酸性阳离子交换树脂催化剂制备过程中的聚合、卤化、磺化共聚物的物理结构。结果表明:该催化剂孔容较常规树脂催化剂的大,孔径较集中;在反应温度75℃、醇油摩尔比8∶1、油脂进料空速1.0 h-1的反应条件下,耐高温强酸性阳离子交换树脂催化桐油酯化的酯化率可达到93%以上,高于常规树脂,且其使用寿命大于1 500 h,稳定性较好。

The catalytic performance of self - made high temperature - resistant strong acid cation ex- change resin in esterification of tung oil was studied. The physical structures of polymerization, halogena- tion and sulfonation copolymers in the process of preparation of high temperature - resistant strong acid cation exchange resin were characterized by ASAP2400 adsorption meter. The results showed that compa- ring with conventional resin catalyst, the pore volume of the high temperature - resistant strong acid cation exchange resin was bigger, and the distribution of its pore diameter was narrower; under the reaction con- ditions of reaction temperature 75 ~C, molar ratio of methanol to tung oil 8：1 and feeding space velocity of oil 1.0 h-I, the esterification rate of tung oil was above 93% with high temperature - resistant strong acid cation exchange resin as catalyst, which was higher than that with conventional resin as catalyst, and the life of the catalyst was over 1 500 h with better stability.