【摘要】 用２３％发烟硫酸、三氧化硫来制备间苯二甲酸二甲酯－５－磺酸钠（ＳＩＰＭ），提供以２３％发烟硫酸，ＳＯ＿３为磺化剂制备的最佳条件。后处理过程中，控制重结晶时滤液与结晶的分离温度，可减少产品中Ｎａ＿２ＳＯ＿４杂质含量并减小ＳＩＰＭ损失。由于磺化温度较高，粗产品色泽较深，脱色时加入一定量锌粉有明显的效果。更多还原

【Abstract】 Optimun Process was obtained to produce Sodium-5-Sulfoisophthalic acid dimethyl ester（SIPM）form 23%fuming sulfuric acid and liquid sulfur trioxide. During later processing,controling the filter liquor in recrystal-lization and separtion temperature of crystal could reduce the Na₂SO₄ content in the product and decrease theSIPM loss,Because of the higher sulfonation temperature,coarse product had deeper colour.Adding somecontent of Zn powder had effects in the discoloring process.更多还原