直接法合成2-乙基己酸亚锡新工艺研究

Study on New Process of Direct Synthesis of 2-ethyl Hexanoic Acid Sub-tin

针对传统的复分解法制备2-乙基己酸亚锡工艺过程中,2-乙基己酸亚锡易于氧化分解,稳定性差的缺点,筛选出高效复合抗氧剂抑制2-乙基己酸亚锡的氧化分解。对合成工艺进行考察,实验结果表明在原料配比为n(C8H16O2):n(NaOH):n(SnCl.2HO)=1:1.04:0.5,复分解反应温度为80℃,反应时间10min,加水92g的工艺条件下,产品亚锡含量最高。

A high-performance composite antioxidant which was comprised with phenothlazine,2,6-di-tert-butyl-4-methylphenol and 4,4-thio-bis（6-t-buty-3-methylphenol） was selected to overcome the disadvantage of easy oxygenolysis and poor stability in the preparation of 2-ethyl hexanoic acid sub-tin.The influences of synthesis technological parameter were investigated.The stannous content was the highest with proportion substrate of n（C8H16O2）：n（NaOH）：n（SnCl2.2H2O）=1：1.04：0.5,in the course of 80℃ and 10min in double decomposition,and 92g H2O added into the reaction.