CAJ | 학술논문

水解法制备氨基葡萄糖盐酸盐的产品初浓度只有3%(wt)左右，需采用重结晶等传统工艺提纯，十分耗能。若能利用萃取-反萃工艺进行浓缩或提纯，在节能降耗方面将有重要意义。今研究了离子交换萃取法在氨基葡萄糖盐酸盐提纯上的应用。选用工业级二(2-乙基己基)磷酸制备钠盐作为萃取剂，以工业无味煤油作为稀释剂，研究了萃取剂初始浓度、NaCl浓度、温度和水相pH等因素对分配系数的影响，结果表明，分配系数随氯化钠初始浓度的增加而降低，随初始萃取剂浓度和温度的增加而升高，随平衡pH的降低而降低。此外，利用pH摆动效应，用浓盐酸实现了离子交换萃取的反萃过程，对比了有机相络合物浓度对反萃分配系数、反萃率等参数的影响，并实现了萃取剂的皂化再生。
수해법제비안기포도당염산염적산품초농도지유3%(wt)좌우，수채용중결정등전통공예제순，십분모능。약능이용췌취-반췌공예진행농축혹제순，재절능강모방면장유중요의의。금연구료리자교환췌취법재안기포도당염산염제순상적응용。선용공업급이(2-을기기기)린산제비납염작위췌취제，이공업무미매유작위희석제，연구료췌취제초시농도、NaCl농도、온도화수상pH등인소대분배계수적영향，결과표명，분배계수수록화납초시농도적증가이강저，수초시췌취제농도화온도적증가이승고，수평형pH적강저이강저。차외，이용pH파동효응，용농염산실현료리자교환췌취적반췌과정，대비료유궤상락합물농도대반췌분배계수、반췌솔등삼수적영향，병실현료췌취제적조화재생。
The initial concentration of glucosamine hydrochloride product prepared via acidic hydrolysis is only approximately 3%(wt). The conventional purification method is recrystallization, which requires high-energy consumption. Therefore, developing an energy-efficient process is of great significance. In this paper, an ion-exchange extraction process was investigated by using sodium di-(2-ethylhexyl) phosphate (D2EHPNa) of industrial grade as the extractant and kerosene of industrial grade as the diluent. The effects of the initial concentrations of D2EHPNa and NaCl, temperature and pH of the aqueous solution on distribution coefficient were studied. The results indicate that the distribution coefficient decreases with the increase of initial concentration of NaCl, increases with the increase of the initial concentration of D2EHPNa and temperature, and decreases with decrease of pH. In addition, the back extraction by concentrated hydrochloric acid was investigated according to the pH swing effect, and the extractant was regenerated after back extraction.