【摘要】 用化学分析法研究酒石酸与胆碱的反应.发现在无水乙醇溶液中反应并非是简单的中和反应,其反应历程与加料次序有关.酒石酸加到胆碱中,则先生成可溶性酒石酸二胆碱盐,然后二盐与过量的酒石酸反应,生成重酒石酸胆碱沉淀.当胆碱加到酒石酸中去时,则先生成酒石酸与重酒石酸胆碱摩尔比为1:1的分子复合物沉淀,而后复合物再与胆碱反应生成重酒石酸胆碱沉淀.此种复合物未见诸于文献.复合物、重酒石酸胆碱盐与酒石酸溶液间存在着固、固、液三相平衡,平衡常数约为0.04.更多还原

【Abstract】 The reaction between tartaric acid and choline has been investigated by means of chemical analysis. It has been found that the reaction in anhydrous ethanol is not simple neutralization. The mechanism is related to feeding order. When adding tartaric acid into choline solution, the soluble choline tartrate is formed first, then it reacts with extra tartaric acid to produce choline bitartrate precipitate. When adding choline into tartaric acid solution, a tartaric acid-choline bitartrate molecular complex is formed as precipitate first in which the molecule ratio is 1:1. Then the complex reacts with extra choline to produce choline bitartrate. This kind of molecular complex has never been reported in literature. There is solid-solid-solution three phases equilibrium among tartaric acid, choline bitartrate and the molecular complex. The equilibrium constant is about 0.04.更多还原