改性磷脂加脂剂的制备研究

Study on preparing of modified phospholipid fatliqoring agent

通过对大豆磷脂进行酯交换、马来酸酐酯化、中和、亚硫酸化化学改性,合成出了亚硫酸化大豆磷脂。研究了改性反应中各因素对反应的影响,得到了酯交换反应的最佳工艺条件为:反应温度70℃,反应时间1h,甲醇与磷脂的质量比为11︰100;酯化反应的最佳工艺为:催化剂质量分数为0.8%,反应温度100℃,反应时间3h,马来酸酐与磷脂的质量比为12︰100～13︰100;在亚硫酸化反应中采用碱-NaHSO3/Na2S2O5体系,先中和后亚硫酸化,中和温度为50～60℃,反应结束后,升高温度至70～80℃,磺化反应程度控制在50%～60%,反应1～1.5 h。

The high active sulphited soybean was prepared using soybean phospholipid as raw materials through four steps： ester exchange, esterification with maleic anhydride, neutralization, sulphitation. The optimum conditions of the ester exchange reaction are obtaind： temperature is 70℃, time is 1h, mass ratio of methanol to phospholid is 11 ： 100. The optimum conditions of the ester reaction are as follow： the dosage of catalyst is 0.8% （ based on mass of phospholipid ）, mass ratio of maleic anhydride and phospholipid is 12 ： 100-13 ： 100, temperature of reaction is 100℃, time is 3h. Alkli--NaHSO3/Na2S2O5 system was used in reaction of sulphitation neutralizing in low temperature （50-60℃） firstly then reaction of sulphitation was carried out in 70-80℃, the extent of sulphitation is controlled 50%-60%, the time is 1-1.5h.