摘要
以环氧氯丙烷和三甲胺为原料,采用水介质合成季铵型阳离子醚化剂,实验研究了反应体系的pH值和反应温度对产率的影响。在正交实验的基础上,实验探索了阳离子淀粉制备工艺中的NaOH用量、水用量及反应温度对产物取代度和反应效率的影响,并在此基础上考察了醚化剂用量与产物取代度之间的关系。研究结果表明,干法制备阳离子淀粉的最佳工艺条件为:碱粉比0.13,水粉比0.23,反应温度75℃,反应时间2.5h。当醚化剂用量为50%时,产物的取代度为0.427,反应效率达80.8%。
The chlorohydroxypropyltrimethylammonium chloride (CHPTMA) was synthesized with epichlorohydrin and trimethylammonium as raw materials by using the water medium process. The influence of the pH and temperature of the reaction system on the yield rate of the product were probed by testing. On the basis of orthogonal test of preparing cationic starch, the effects of the amount of hydroxide sodium, water and temperature on the substitutions of the products and reaction efficiency were studied by doing a serial experiment. Then the relation between the amount of CHPTMA and the substitutions of products were investigated. The results showed that the optimal reaction conditions of preparing cationic starch using dry process were hydroxide sodium/starch: 0.13, water/ starch: 0.23, temperature: 75℃ and reaction time: 2.5 h. When the amount of CHPTMA was 50%, the substitution degree of product was 0.427, and the reaction efficiency was 80.8%.
出处
《粮食与饲料工业》
CAS
2004年第10期36-37,共2页
Cereal & Feed Industry
关键词
阳离子淀粉
制备工艺
干法
取代度
反应温度
产率
PH值
cationic starch
3-chloro-2-hydroxypropyl-trimethyl ammonium chloride
the degree of substitution
