3-氯-2-羟丙基三甲基氯化铵萃取提纯工艺研究

Purification of 3-Chloro-2-Hydroxypropyl Trimethylammonium Chloride by Extraction

研究3-氯-2-羟丙基三甲基氯化铵粗产品的萃取提纯及萃取剂的再生。考察了不同萃取剂对粗产品的萃取提纯,结果表明,萃取剂HYT能够显著降低产品中的主要杂质环氧氯丙烷和1,3-二氯-2-丙醇的含量,萃取后两种杂质含量分别为14.8和25.0 mg/kg。研究了温度、碱的种类、碱的浓度及反应时间对萃取剂HYT再生反应的影响,确立了再生反应最适宜条件,即:在120℃下,用质量分数为6.5%的NaOH溶液将回收萃取剂皂化反应3 h。

Purification of 3-chloro-2-hydroxypropyl trimethylammonium chloride（CHPTMAC） by extraction with different extractants and regeneration of extractants were studied.The effect of extractant was analyzed.The results showed that the extractant HYT could significantly reduce the content of 1,3-dichloro-2-propanol（DCP） and epichlorohydrin（ECH） in product.The content of DCP and ECH was decreased to 14.8 mg/kg and 25 mg/kg,respectively after extraction.The effects of temperature,types and concentration of alkali and reaction time on the regeneration of extractant HYT were studied.The optimal regeneration condition was established that the extractant was saponified in 6.5% NaOH aqueous solution under 120 ℃ for 3 h.