阳离子烷基糖苷合成过程中的季铵化反应

针对泥页岩等易坍塌地层的井壁失稳问题,开展了强抑制剂阳离子烷基糖苷的研制。以烷基糖苷与环氧氯丙烷的水解产物3-氯-1,2-丙二醇反应生成3-氯-2-羟丙基糖苷。考察了3-氯-2-羟丙基糖苷与三甲胺发生季铵化反应的反应条件。结果表明,在pH值为9的条件下,将3-氯-2-羟丙基糖苷与三甲胺按摩尔比1∶1混合均匀,三甲胺的加料方式为直加,在56℃下搅拌反应5 h,得到的钻井液用阳离子烷基糖苷产品抑制性能最优,岩心一次回收率96%,相对回收率98%。

Quaternized reaction in the synthesis process of cationic alkyl glucoside

In view of the well bore instability problem in the mud and shale formation,the strong inhibitor of cationic alkyl glucoside was prepared. Alkyl glucoside and 3-chloro-1,2-propylene glycol which is the hydrolysis product of epoxy chloropropane were used as raw materials to produce 3-chloro-2-hydroxypropyl glycoside. The reaction conditions of quaternization between 3-chloro-2-hydroxypropyl glycoside and trimethylamine were investigated. The results show that when the pH value is 9,the molar ratio of 3-chloro-2-hydroxypropyl glycoside and trimethylamine was 1 ∶ 1,mixed fully,feeding mode of trimethylamine is directly added into the reaction system. When mixing reaction at 56 ℃ for 5 h,the inhibition performance of cationic alkyl glucoside used in drilling fluid is excellent,cuttings first recovery was more than 96%,cuttings relative recovery was more than 98%.