In this paper we studied out a heterogeneous sulfonationmethod for preparing sulfonated polysulfone with low sulfonation values.
本文采用非均相磺化反应方法，制备了低磺化度的磺化聚砜。
2
A new method to synthesize sodium dioleyl sulfosuccinate by esterification and sulfonation without adding any extra phase catalyst in nitrogen atmosphere was developed.
研究在氮气保护下采用非外加相转移催化剂经酯化和磺化合成磺基琥珀酸双十八油酯磺酸钠的新方法。
3
The pressurized sulfonation and methylation process of utilizing black liquor to prepare additive for CWM is studied by cross test and a new method of performance evaluation for CWM is given.