Synthesis method of hydroxyalkyl tertiary ammonium beta-hydroxyalkyldienediaminocaproate
A technology of diaminocaproic acid hydroxyalkyl tertiary amine and diaminocaproic acid, which is applied in the field of antirust additive synthesis, can solve the problems of few product varieties and limited application coverage, achieve strong antirust effect and improve anodic polarization performance, corrosion inhibitory effect
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Embodiment 1
[0022] In a four-necked flask equipped with a stirring device, a reflux condensing device and a thermometer, add 159 grams of benzene, add 2 grams of zinc chloride, 1 gram of zinc oxide and 106 grams of caprolactam, and slowly add 29 grams of chlorinated epoxy Propane, add a saturated aqueous solution of sodium carbonate to the reaction mixture, raise the temperature to 80°C-90°C and continue the reflux reaction for 7 hours. During the reaction, use an acid-binding agent to control the pH at 8.5-9.5 to generate biscaprolactam-2-ol, and the reaction is complete Afterwards, cool to 30°C, stop stirring, add 120 grams of 47% sodium hydroxide solution to the reaction mixture to dilute and hydrolyze the reaction, the reaction mixture is divided into two layers, the upper layer is an organic phase, and the lower layer is separated to obtain a liquid β-hydroxyalkane Diethylene diaminocaproic acid sodium solution, slowly add 30% sulfuric acid solution to the β-hydroxyalkylene diaminocap...
Embodiment 2
[0024] In a four-neck flask equipped with a stirring device, a reflux condensing device and a thermometer, add 165 grams of benzene, 2 grams of zinc chloride, 2 grams of zinc oxide and 82.5 grams of caprolactam, and slowly add 31 grams of chlorinated epoxy Butane, add saturated aqueous solution of sodium carbonate to the reaction mixture, raise the temperature to 85°C-95°C and continue the reflux reaction for 6 hours. During the reaction, use an acid-binding agent to control the pH at 8.5-9.5 to generate biscaprolactam-2-ol. After completion, cool to 40°C, stop stirring, add 100 grams of 44% sodium hydroxide solution to the reaction mixture for dilution and hydrolysis reaction, the reaction mixture is divided into two layers, the upper layer is the organic phase, and the lower layer is separated to obtain liquid β-hydroxyl Sodium alkylene diaminocaproate solution, slowly add 20% hydrochloric acid to the sodium β-hydroxyalkylene diaminocaproate solution, adjust the pH to about 1...
Embodiment 3
[0026] In a four-neck flask equipped with a stirring device, a reflux condensing device and a thermometer, add 176 grams of benzene, 1.5 grams of zinc chloride, 1.2 grams of zinc oxide and 70.5 grams of caprolactam, and slowly add 33 grams of chlorinated epoxy Butane, add saturated aqueous solution of sodium carbonate to the reaction mixture, raise the temperature to 90°C-95°C and continue the reflux reaction for 8 hours. During the reaction, use an acid-binding agent to control the pH at 8.5-9.5 to generate biscaprolactam-2-ol. After completion, cool to 20°C, stop stirring, add 95 grams of 40% sodium hydroxide solution to the reaction mixture for dilution and hydrolysis reaction, the reaction mixture is divided into two layers, the upper layer is an organic phase, and the lower layer is separated to obtain liquid β-hydroxyl Sodium alkylene diaminocaproate solution, slowly add 35% sulfuric acid solution to the sodium β-hydroxyalkylene diaminocaproate solution, adjust the pH to ...
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