Streck法合成烷基酚聚氧乙烯醚磺酸盐过程中磺化条件的研究

Study on the sulfonating conditions of alkylphenol polyxyethylene ether sulfonate synthesized by the method of Streck

聚醚磺酸盐是一种耐温耐盐型表面活性剂.实验室以辛基酚聚氧乙烯醚(OP-4)为原料,和氯化亚砜(SOCl2)发生氯代反应后得到中间体,再分别以亚硫酸钠、亚硫酸钠与亚硫酸氢钠混合物、亚硫酸钾为磺化剂磺化氯代产物合成了辛基酚聚氧乙烯醚磺酸盐(OPS-4).实验重点优化了磺化反应的条件,发现170℃下氯代产物和亚硫酸钾以物质的量比1.0∶1.3反应4 h,磺酸盐产率可达到82.6%.利用红外光谱对中间体及产物结构进行了初步表征.

Octylphenol polyoxyethylene ether sulfonate(OPS) is a kind of nonionic-anionic surfactant with a good performance of temperature-tolerance and salt-tolerance.It is synthesized in laboratory by the chlorination reaction of octylphenol polyxyethylene ether(OP-4) with thionyl chloride(SOCl2) and the sulfonation reaction of the obtained intermediate with sodium sulfite,the mixture of sodium sulfite and sodium bisulfite and potassium sulfite of different sulfonating agents separately.The conditions of the sulfonation reaction are optimized.The results show that the yield rate of sulfonation can reach to 82.6% under the optimum reaction conditions: the molar ratio of the intermediate to potassium sulfite is 1:1.3,reaction temperature is 170 ℃,and reaction time is 4 h.The chemical structures of the intermediate and the product are characterized by IR.