马来酸甲基锡的合成研究

Study on The Synthesis of Methyltin Maleate

以甲基氧化锡和马来酸溶液为原料,反应合成一种无硫化污染、无臭味的PVC加工热稳定剂马来酸甲基锡。研究讨论了合成反应的工艺条件对产率以及产品锡含量的影响,最佳的合成工艺条件为:(1)马来酸反应系数1.01;(2)马来酸溶液浓度为45%;(3)反应温度35℃;(4)反应时间4 h。在此工艺条件下产率最大,达97.8%以上,产品锡含量45.2%左右,与理论值较接近。

Methyl tin maleate,a non-sulfur pollution and odorless heat stabilizer for PVC processing,was synthesized from methyl tin oxide and maleic acid solution.The effects of synthetic conditions on the yield and tin content of the product were discussed.The results showed that the optimum synthetic conditions were:(1)the reaction coefficient of maleic acid was 1.01;(2)the concentration of maleic acid solution was 45%;(3)the reaction temperature was 35 C;and(4)the reaction time was 4 hours.Under these conditions,the yield is the highest,reaching over 97.8%,and the tin content of the product is about 45.2%,which is close to the theoretical value.