3-氯-2-羟丙基-三甲基氯化铵

3-氯-2-羟丙基-三甲基氯化铵的合成--《化学工业与工程》2006年06期
以环氧氯丙烷和三甲铵盐酸盐为原料,一步法合成了3-氯-2-羟丙基-三甲
基氯化铵(CHPTMAC)。

采用分段升温的反应和环氧氯丙烷向三甲铵盐酸盐水溶液中连续滴加的反应方式。

试验结果表明,适宜的合成工艺条件为原料环氧氯丙烷和三甲铵盐酸盐的摩尔比为1.05,溶液初始pH保持8.5,分段升温反应,反应温度在15℃~35℃范围内。

利用HPLC和GC对产品组成进行了分析,并且通过醚化试验对产品质量进行了检验。

【作者单位】：天津大学化工学院天津300072
【关键词】：3-氯-2-羟丙基-三甲基氯化铵;分段升温;三甲铵盐酸盐;环氧氯丙烷
【基金】：天津市自然科学基金资助项目(013605611)
【分类号】：O623.7
【DOI】：cnki:ISSN:1004-9533.0.2006-06-004
【正文快照】：
3-氯-2-羟丙基-三甲基氯化铵(CHPTMAC)是一种阳离子醚化剂,大量用于淀粉和纤维素的改性,传统的合成方法是环氧氯丙烷和三甲铵盐酸盐在常温下反应,反应后减压除去未反应的原料与副产物。

目前,国产的CHPTMAC与Dow化学公司产品QUAT188(3-氯-2-羟丙基-三甲基氯化铵质量分数65%,环氧氯丙烷质量分数≤0·000 5%,1,3-二氯-2-丙醇质量分数≤0·01%)相比杂质含量高,醚化产品的稳定性较差。

因此,国内绝大多数改性淀粉厂都使用进口醚化剂,由于进口的醚化剂价格高,使得国产阳离子淀粉质量较低而成本较高,难以参与市场竞争[1~3]。

研究合成高质量…
3-Chloro-2-hydroxypropyltrimethylammonium chloride(CHPTMAC) was prepared with epichlorohydrin and trimethylammonium by one step method.In the reaction,methods of temperature subsection reaction were adopted,and epichlorohydrin was continuously dropped to the solution of trimethylammonium.Main influence factors such as feed ratio,pH,reaction temperature and reaction time were studied.A proper reaction conditions was obtained as follows: the molar ratio of epichlorohydrin to trimethylammonium chloride was 1.05,the initial pH of the reactants was 8.5,the temperature subsection of reaction was adopted,and the reaction temperat ure was kept between 15 ℃ and 35 ℃.A preferable synthesis process is brought up and a better product is produced.The products' constitution was determined by HPLC and GC,and the products' quality was
checked up by the etherifying experiments. 【Keyword】：3-chloro-2-hydroxypropyltrimethylammonium chloride;temperature subsection;trimethy-lammonium chloride;epichlorohydrin ......
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