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Method for preparing pure octadecylamine emulsion

A technology of octadecylamine and emulsion, applied in the field of dye intermediate synthesis, can solve the problems of low purity of octadecylamine emulsion, unsuitable for industrial production needs, etc., and achieves improved emulsion stability, high and low temperature stability, and reasonable ratio. Effect

Inactive Publication Date: 2015-06-10
天津百伦斯生物技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purity of octadecylamine emulsion obtained by the above method is relatively low, which is not suitable for industrial production needs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A preparation method of pure octadecylamine emulsion, the steps are as follows:

[0027] (1) Add 65ml of tween80 and 3.5ml of glacial acetic acid in 600ml of pure water while stirring and stir to dissolve.

[0028] (2) In the above system, keep the temperature at 50°C and the stirring speed at 150r / m, slowly add 200g of octadecylamine solid and dropwise add 1220ml of pure water at the same time.

[0029] (3) Keep the constant temperature at 50°C and stir at 150-180r / m for 2h.

[0030] The obtained pure stearylamine emulsion is still in a stable emulsified state after being stored for one year. At 15°C, the emulsion was still stable and no agglomeration was found.

Embodiment 2

[0032] A preparation method of pure octadecylamine emulsion, the steps are as follows:

[0033] (1) Add 65ml of tween80 and 3.5ml of glacial acetic acid in 600ml of pure water while stirring and stir to dissolve.

[0034] (2) In the above system, keep the temperature at 60°C and the stirring speed at 180r / m, slowly add 200g of octadecylamine solid and dropwise add 1220ml of pure water at the same time.

[0035] (3) Keep the constant temperature at 60°C and stir at 180r / m for 2h.

[0036] The obtained pure stearylamine emulsion is still in a stable emulsified state after being stored for one year. At 15°C, the emulsion was still stable and no agglomeration was found.

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PUM

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Abstract

The invention relates to a method for preparing pure octadecylamine emulsion. The method comprises the following steps: (1) preparing a hydrotropy system in sufficient stirring, wherein the hydrotropy system comprises a dispersing agent, a cosolvent and a solvent; (2) slowly adding octadecylamine solid into the hydrotropy system in stirring at constant temperature, and additionally adding the solvent to dissolve the octadecylamine solid; (3) stirring for 2 hours at constant temperature, thereby obtaining the stable octadecylamine emulsion. Due to addition of the dispersing agent, the cosolvent and the solvent into the octadecylamine solid, the octadecylamine solid can be converted into a liquid, and the octadecylamine emulsion is relatively high in low-temperature stability and is applicable to maintenance of heat supply equipment in the heat supply stopping process.

Description

technical field [0001] The invention relates to the field of synthesis of dye intermediates, and relates to a preparation method of pure octadecylamine emulsion. Background technique [0002] During the outage of thermal equipment, at O 2 , CO 2 Under the joint action of water and water, if no effective protection and anti-corrosion measures are taken, the thermal equipment system will be corroded in a large area—the so-called decommissioning corrosion of thermal equipment, which is more serious than the running corrosion, until the thermal equipment is forced to shut down . [0003] Pure octadecylamine emulsion enables the application of film-forming amine protection technology. It forms a hydrophobic film on the metal surface and can penetrate under the scale layer, which can prevent water and dissolved O in it without affecting thermal conductivity. 2 Oxidation of equipment metals inhibits the occurrence of corrosion reactions. During the start-up period of the unit,...

Claims

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Application Information

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IPC IPC(8): C23F11/14
Inventor 贾伟青卢艳凤杜晓彤
Owner 天津百伦斯生物技术有限公司
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