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A kind of synthetic method of bispiperidinyl-2-alcohol

A technology of bis-piperidinyl and synthesis method is applied in the field of synthesizing bis-piperidinyl-2-ol, which can solve the problems of few product varieties and limited application coverage, achieve simple and easy reaction operation, and improve anode polarization. performance, effect of inhibiting corrosion

Inactive Publication Date: 2016-08-17
CECEP GUOHUAN NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with advanced countries, China's vapor phase antirust technology still has the problems of fewer product varieties and limited application coverage. Therefore, it is necessary to increase the promotion of advanced technologies and at the same time strengthen the research and development of vapor phase antirust agents.

Method used

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  • A kind of synthetic method of bispiperidinyl-2-alcohol
  • A kind of synthetic method of bispiperidinyl-2-alcohol

Examples

Experimental program
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Effect test

Embodiment 1

[0018] In a four-neck flask equipped with a stirring device, a reflux condenser and a thermometer, add 129 grams of benzene, 1.1 grams of zinc chloride and 51.6 grams of piperidine, and slowly add 28 grams of chloropropylene oxide under stirring conditions. The reaction was refluxed at 80℃~85℃ for 3 hours to produce the intermediate product monopiperidin-2-ol. A saturated aqueous potassium carbonate solution was added to the reaction mixture, and the temperature was raised to 85℃~90℃ to continue the reflux reaction for 5 hours. During the reaction Use a saturated aqueous solution of potassium carbonate to control the pH at 8-9 to produce bispiperidin-2-ol. After the reaction is completed, cool to 25-35°C, stop stirring, and let stand. The reaction mixture is divided into two layers, the upper layer is the organic phase , Separate the lower layer containing the sediment, add water to dilute and dissolve the sediment, extract the lower diluted solution twice with 51.6 g of benzene...

Embodiment 2

[0020] In a four-neck flask equipped with a stirring device, a reflux condenser and a thermometer, add 120 grams of benzene, add 0.4 grams of zinc chloride, 0.32 grams of zinc hydroxide and 60 grams of piperidine, and slowly add 30 grams of chlorinated Butylene oxide, reflux reaction at 85℃~90℃ for 4 hours to produce the intermediate product monopiperidin-2-ol. Add 20% potassium hydroxide solution to the reaction mixture, and then heat to 90℃~95℃ to continue The reaction was refluxed for 3 hours. During the reaction, the pH was controlled at 8-9 with 20% potassium hydroxide solution to generate bispiperidin-2-ol. After the reaction, it was cooled to 30-40°C, the stirring was stopped, and the reaction was allowed to stand still. The mixture is divided into two layers, the upper layer is the organic phase, the lower layer containing the sediment is separated, the lower layer is diluted and dissolved by adding water, and the lower layer diluted solution is extracted twice with 54 g...

Embodiment 3

[0022] In a four-neck flask equipped with a stirring device, a reflux condenser and a thermometer, add 134 grams of benzene, add 0.30 grams of zinc chloride, 0.22 grams of zinc hydroxide and 89 grams of piperidine, slowly add 32 grams of chlorinated Butylene oxide, reflux reaction at 80℃~90℃ for 3.5 hours to produce the intermediate product monopiperidin-2-ol. Add 20% potassium hydroxide solution to the reaction mixture, and then heat to 85℃~95℃ to continue The reaction was refluxed for 4 hours. During the reaction, the pH was controlled at 8-9 with 20% potassium hydroxide solution to generate bispiperidin-2-ol. After the reaction was completed, cooled to 20-30°C, stopped stirring, stood still, and reacted. The mixture is divided into two layers. The upper layer is the organic phase. The lower layer containing the sediment is separated. The lower layer is diluted and dissolved by adding water. The lower layer diluted solution is extracted twice with 72 grams of benzene. The uppe...

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Abstract

The invention discloses a method for synthesizing bispiperidinyl-2-alcohol. Using benzene as a solvent, zinc chloride and zinc hydroxide as catalysts, chloroalkylene oxide and piperidine are refluxed under stirring conditions. Generate intermediate product chlorinated monopiperidinyl-2-alcohol, in the presence of acid-binding agent, continue to reflux reaction, generate bispiperidinyl-2-alcohol, stand still, separate and purify, make bispiperidine Base-2-alcohol, using chlorinated alkylene oxide and piperidine to react, by adding catalyst to control the ring opening of chlorinated alkylene oxide, so that the reaction is easy to proceed; the composition has multiple active adsorption centers, which can improve the performance of anodic polarization , Inhibit corrosion, belongs to anodic corrosion inhibitor.

Description

technical field [0001] The invention relates to the technical field of synthesis of antirust additives, in particular to a synthesis method of bispiperidinyl-2-ol. Background technique [0002] Gas-phase corrosion inhibitors can be directly vaporized at normal temperature and pressure, alone or attached to a suitable carrier. In a sealed environment, through self-adjustable continuous volatilization, any space gap in the work unit will be filled with a mixed gas containing a gas-phase corrosion inhibitor anti-rust factor. When this gas encounters a metal surface, it will be adsorbed on it, forming only A dense protective film layer one or several molecules thick. The protective film layer can effectively isolate the metal surface from contact with moisture, oxygen and other harmful atmospheric corrosion factors, and inhibit the occurrence of electrochemical reactions that promote metal corrosion, so as to achieve the best anti-corrosion effect. At present, gas phase anti-r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D295/088
CPCC07D295/088
Inventor 修建东刘方旭
Owner CECEP GUOHUAN NEW MATERIAL
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