Synthesis of a new anti-rust lubricant additive

The citric acid polyethyleneoxide ether amber diehylene glycol dinitrate diglycollic amide was synthesized by using citric acide,polyethyleneoxide ether amber diehylene glycol and diethanolamine as the materials.The product was a kind of additive in water soluble cutting fluid,and it had anti-rust and lubricant double functions.The conditions were the follows:citric acid:acetic anhydride was the follows 1.0∶1.2(mole ratio),reaction time was 18h,reaction temperature was 35℃.The esterification conditions were that anhydride:OP was 1.0∶1.2(mole ratio),reaction temperature was 90～95℃,reaction time was 3h.The amidate conditions were that citric acid polyethyleneoxide monoether:diethanolamine was 1.0∶1.5(mole ratio),reaction temperature was 130～140℃,reaction time was 3～4h.The constructs of raw materials,intermediates and products were characterized by IR.So,the optimum synthesis processc conditions were obtained.