不同种类抗氧化剂对环丁砜热稳定性的影响

选取4 种常见的抗氧化剂，考察不同种类抗氧化剂对环丁砜热稳定性的影响，以SO2释放量作为衡量环丁砜热稳定性大小的指标。实验结果表明，4种抗氧化剂均可改善环丁砜的热稳定性，其改善作用由大到小的顺序为：酚类抗氧化剂＞胺类抗氧化剂＞含硫抗氧化剂＞含铜抗氧化剂。综合考虑多种因素的影响，实际生产中宜采用胺类抗氧化剂作为环丁砜抗氧化剂。

EFFECT OF DIFFERENT ANTIOXIDANT ON THERMAL STABILITY OF SULFOLANE

Four kinds of antioxidants were selected to investigate the effect on the thermal stability of sulfolane. The quantity of sulfur dioxide release was taken as the comparison index. The results show that all antioxidants chosen are effective for improving the thermal stability of sulfolane and that the influence order of the four antioxidants on the thermal stability of sulfolane is phenolic antioxidant ＞ amine antioxidant ＞ sulfur containing antioxidant ＞ copper containing antioxidant. The phenolic antioxidant has the best effect when the addition amount of this antioxidant is 0.12g.