中文摘要：

考察了浓度、反应时间和反应温度等工艺条件对高温液态水中卵磷脂水解反应的影响,探究了高温液态水中卵磷脂的水解机理,并得到相关动力学数据。结果表明,初始浓度对卵磷脂水解反应影响不大,随着反应时间延长和温度升高,卵磷脂转化率、甘油产率、选择性均随之增加。卵磷脂水解过程分两步进行,第一步水解生成磷脂酸、胆碱,第二步中间产物磷脂酸进一步水解生成脂肪酸、甘油、磷酸。同时,胆碱与磷酸在水相体系中发生酸碱成盐反应。采用一级连串反应动力学方程对实验数据进行拟合,得到卵磷脂水解的表观活化能为68.3 k J×mol^-1,磷脂酸水解生成甘油的表观活化能为131.4 k J×mol^-1。

英文摘要：

The effects of concentration, reaction time and reaction temperature on the hydrolysis of phosphatidylcholine（PC） in high temperature liquid water（HTLW） were investigated. The mechanism of PC hydrolysis in HTLW was probed and related kinetic data were obtained. The results show that initial concentration does not significantly affect PC hydrolysis. PC conversion, glycerol yield and selectivity increase with the increase of reaction time and temperature. The hydrolysis process includes two steps： 1. PC is hydrolyzed into phosphatidic acid and choline. 2. phosphatidic acid is further hydrolyzed into free fatty acids, glycerol and phosphoric acid. Meanwhile, the salt forming reaction of choline and phosphoric acid occurs in the aqueous phase system. The experimental data were fitted by a first-order consecutive kinetic equation. The apparent activation energy of PC hydrolysis is 68.3 k J·mol^-1, and that of the hydrolysis of phosphatidic acid to glycerol is 131.4 k J·mol^-1.