The Synthesis Of Tertiary Amine Containing Polyether Chain And Its Application As Acid Scavenger

Ionic liquids which have the properties of non-volatilization, wide liquid-range temperature, strong dissolution ability and easy regulation etc are developed for the new medium and soft functional materials in recent ten years under the framework of green chemistry and investigated in many fields. In many industrial applications, the traditional reaction and separation processes are gradually replaced by ionic liquids due to their good performance.A novel tertiary amine A is designed and synthesized. After it reacts with HCl, the product ammonium salt is a kind of room temperature ionic liquid which is immiscible with non-polar organic solvents. The tertiary amine could be used to take the place of traditional acid scavengers and the formed ammonium salt ionic liquid could be separated by liquid-liquid phase separation. Compared with traditional organic bases as acid scavengers, it could solve the problem of operating inconvenience caused by the formation of solid salt. When the tertiary amine was used in the synthesis of trialkyl phosphite, the optimum condition obtained is, with 100 ml cyclohexane as the solvent and 80 mmol (3.2 equiv.) tertiary amine A as the acid scavenger, adding dropwise 25 mmol PCl3 and 80 mmol (3.2 equiv.) aliphatic alcohols respectively diluted with 50 ml cyclohexane in ice bath and reacting at 0-5℃for 2 hours. This reaction process has the advantage of simple separation of the product, and the ammonium salt ionic liquid can reproduce the tertiary amine easily to recycle. So it holds some promise in practical applications.