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Synthesis method of bis-piperidinyl-2-ol

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: 2014-11-19
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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  • Synthesis method of bis-piperidinyl-2-ol

Examples

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Comparison scheme
Effect test

Embodiment 1

[0018] In a four-necked flask equipped with a stirring device, a reflux condensing device and a thermometer, add 129 grams of benzene, add 1.1 grams of zinc chloride and 51.6 grams of piperidine, and slowly add 28 grams of chlorinated epoxypropane under stirring conditions. Reflux reaction at 80°C to 85°C for 3 hours to generate the intermediate product monopiperidinyl-2-ol, add saturated aqueous solution of potassium carbonate to the reaction mixture, then raise the temperature to 85°C to 90°C and continue the reflux reaction for 5 hours, during the reaction Use a saturated potassium carbonate aqueous solution to control the pH at 8-9 to generate bispiperidinyl-2-ol. After the reaction is completed, cool to 25-35°C, stop stirring, and let it stand. The reaction mixture is divided into two layers, and the upper layer is an organic phase. , separate and contain sediment lower layer, add water and dilute and dissolve sediment, extract twice with 51.6 grams of benzene to lower lay...

Embodiment 2

[0020] In a four-necked flask equipped with a stirring device, a reflux condensing device 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 at 85°C to 90°C for 4 hours to generate the intermediate product monopiperidinyl-2-ol, add 20% potassium hydroxide solution to the reaction mixture, and then raise the temperature to 90°C to 95°C to continue Reflux reaction for 3 hours. During the reaction, use 20% potassium hydroxide solution to control the pH at 8-9 to generate bispiperidinyl-2-ol. After the reaction is completed, cool to 30-40°C, stop stirring, stand still, and react The mixture is divided into two layers, the upper layer is an organic phase, and the lower layer containing the sediment is separated, and water is added to dilute and dissolve the sediment, and the diluted solution of the lower layer is extracted twice with 54 gra...

Embodiment 3

[0022] In a four-neck flask equipped with a stirring device, a reflux condensing device 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, and slowly add 32 grams of chlorinated Butylene oxide, reflux at 80°C to 90°C for 3.5 hours to generate the intermediate product product monopiperidinyl-2-ol, add 20% potassium hydroxide solution to the reaction mixture, then raise the temperature to 85°C to 95°C to continue Reflux reaction for 4 hours. During the reaction, use 20% potassium hydroxide solution to control the pH at 8~9 to generate bispiperidinyl-2-ol. After the reaction is completed, cool to 20~30°C, stop stirring, stand still, and react The mixture is divided into two layers, the upper layer is an organic phase, and the lower layer containing the sediment is separated, and water is added to dilute and dissolve the sediment, and the diluted solution of the lower layer is extracted twice with 7...

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Abstract

The invention discloses a synthesis method of bis-piperidinyl-2-ol. The synthesis method comprises the following steps: performing reflux reaction on chlorinated alkylene oxide and piperidine under stirring conditions by taking benzene as a solvent and taking zinc chloride and zinc hydroxide as catalysts to generate an intermediate product, namely chlorinated single-piperidinyl-2-ol; further performing reflux reaction in the presence of an acid binding agent to generate the bis-piperidinyl-2-ol, standing, stratifying, separating and purifying to prepare the bis-piperidinyl-2-ol. The chlorinated alkylene oxide and the piperidine are adopted for reaction and ring opening of the chlorinated alkylene oxide is controlled by adding the catalysts to ensure that the reaction is performed easily; a composite has multiple active adsorption centers and can improve the polarization performance of an anode, inhibit the corrosion effect and belongs to an 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 Applications(China)
IPC IPC(8): C07D295/088
CPCC07D295/088
Inventor 修建东刘方旭
Owner CECEP GUOHUAN NEW MATERIAL
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