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A preparing method of a controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsule

Active Publication Date: 2017-02-08
CHANGSHU INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, conventional corrosion inhibitors (such as sodium nitrite) have the following defects: 1) conventional corrosion inhibitors are toxic, which will cause serious harm to humans and the natural environment; 2) conventional corrosion inhibitors are not suitable for open In the operating system, the corrosion inhibitor is easily taken away by the flowing medium in the open system, or easily carried out by the extract, resulting in serious waste of resources; 3) The performance of the conventionally used corrosion inhibitor is unstable at room temperature, and it is easy Deterioration, causing it to easily lose its corrosion inhibition ability

Method used

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  • A preparing method of a controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsule
  • A preparing method of a controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsule

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Experimental program
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Effect test

Embodiment 1

[0021] (1) Weigh a certain mass ratio of methylene chloride, petroleum ether, Span 80 and cetyl trimethyl ammonium bromide in a high-speed emulsifier, dichloromethane, petroleum ether, Span 80 and cetyl Trimethylammonium bromide accounts for 30%, 52.83%, 0.7%, 0.3% of the total weight of the feed, and then a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo are added to the emulsifier Diisobutyronitrile mixed solution, styrene, methacrylic acid, glycidyl methacrylate and azobisisobutyronitrile respectively account for 7%, 0.6%, 1.5%, 0.07% of the total weight of the feed, and the speed is 15000~20000r Adjust the emulsification and dispersion for 10-15 minutes and then move it into the reactor;

[0022] (2) Add sodium nitrite accounting for 7% of the total weight of the feed into the reactor, react at 60-70°C for 5-7 hours, and raise the reaction temperature to 90-95°C for 3-4 hours;

[0023] (3) Cool to room temperature, wash with water twice, and coll...

Embodiment 2

[0029] (1) Weigh a certain mass ratio of methylene chloride, petroleum ether, Span 80 and cetyl trimethyl ammonium bromide in a high-speed emulsifier, dichloromethane, petroleum ether, Span 80 and cetyl Trimethylammonium bromide accounted for 35%, 40.8%, 0.9%, 0.5% of the total weight of the feed, and then added a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo into the emulsifier Diisobutyronitrile mixed solution, styrene, methacrylic acid, glycidyl methacrylate and azobisisobutyronitrile respectively account for 10%, 0.9%, 1.8%, 0.1% of the total weight of the feed, and the speed is 15000~20000r Adjust the emulsification and dispersion for 10-15 minutes and then move it into the reactor;

[0030] (2) Add sodium nitrite accounting for 10% of the total weight of the feed into the reactor, react at 60-70°C for 5-7 hours, and raise the reaction temperature to 90-95°C for 3 to 4 hours;

[0031] (3) Cool to room temperature, wash with water twice, and co...

Embodiment 3

[0033] (1) Weigh a certain mass ratio of methylene chloride, petroleum ether, Span 80 and cetyl trimethyl ammonium bromide in a high-speed emulsifier, dichloromethane, petroleum ether, Span 80 and cetyl Trimethylammonium bromide accounts for 32%, 49.62%, 0.7%, 0.4% of the total weight of the feed, and then a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo are added to the emulsifier Diisobutyronitrile mixed solution, styrene, methacrylic acid, glycidyl methacrylate and azobisisobutyronitrile accounted for 8%, 0.7%, 1.5%, 0.08% of the total weight of the feed, and the speed is 15000~20000r Adjust the emulsification and dispersion for 10-15 minutes and then move it into the reactor;

[0034] (2) Add sodium nitrite accounting for 7% of the total weight of the feed into the reactor, react at 60-70°C for 5-7 hours, and raise the reaction temperature to 90-95°C for 3-4 hours;

[0035] (3) Cool to room temperature, wash with water twice, and collect the sam...

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Abstract

A preparing method of a controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsule is disclosed. The method includes (1) weighing dichloromethane, petroleum ether, Span 80 and hexadecyl trimethyl ammonium bromide in a certain mass ratio into a high-speed emulsifying machine, adding a mixed solution of styrene, methacrylic acid, glycidyl methacrylate and azobisisobutyronitrile in a certain mass ratio into the emulsifying machine, and transferring to a reaction kettle after a certain period of time of emulsification and dispersion, (2) adding sodium nitrite into the reaction kettle, performing a first stage reaction at 60-70 DEG C, raising the reaction temperature to 90-95 DEG C and performing a second stage reaction, and (3) cooling to room temperature, washing with water for twice, and colleting to obtain a sample. The sodium nitrite corrosion inhibitor microcapsule prepared by the method can achieve long-acting corrosion inhibition and has a wide application range.

Description

Technical field [0001] The invention belongs to the technical fields of oil field chemistry, coatings, new materials, chemistry and chemical engineering, and specifically relates to a preparation method of a controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsule. Background technique [0002] Metal corrosion is a very common phenomenon in nature. For example, iron devices are easy to rust in humid air, underground metal pipes are easy to corrode and perforate, chemical machinery is rusted and perforated after encountering strong corrosive media, and aluminum products are easy to corrode into white powder in humid air, etc. Wait. Corrosion seriously affects the development of the national economy. The annual economic loss caused by corrosion in our country accounts for about 5% to 10% of the GDP. The annual economic loss caused by corrosion in various countries in the world also far exceeds that caused by other natural disasters. The sum of economic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F212/08C08F220/32C08F220/06C23F11/18
CPCC08F212/08C23F11/181C08F220/325C08F220/06
Inventor 左明明袁续周左晓兵耿飞曹振兴罗铭
Owner CHANGSHU INSTITUTE OF TECHNOLOGY
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