关键词:

氯化胆碱, 离子交换树脂, 提纯, 电解

Abstract:

Choline chloride is one of the raw materials to produce high-pure cholineThe choline chloride solution contains many kinds of metal ions such as Na⁺, K⁺, Mg²⁺, Ca²⁺ and so onMetal ion has a bad influence on the quality of high-pure cholineWU64-H resin was used to eliminate the metal ions in choline chlorideThe effects of transformation agent, flow rate and concentration were investigatedExperimental result indicated that, the electron-grade tetramethylammonium hydroxide was the best transformation agent,the best flow rate was 5 times as bed volume rate in an hour and the optimal concentration was 2 mol·L^-1Under these optimal conditions, the concentrations of metal ions were significantly decreasedCholine was prepared by electrolysisThe current density was 1000 A·m^-2 and the temperature was 50℃After electrolysis, the contents of metal ions were below 100 μg·L^-1, and came up to the requirements.

Key words:

氯化胆碱, 离子交换树脂, 提纯, 电解