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。
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 Na_2SO_4 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.
出处
《合成纤维工业》
CAS
CSCD
1995年第2期11-13,共3页
China Synthetic Fiber Industry
关键词
聚酯纤维
染色
改性剂
助剂
SIPM
sulfonation
sulfur trioxide
esterification
