Unlock instant, AI-driven research and patent intelligence for your innovation.

A preparation method of controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsules

A slow-release sodium nitrite and corrosion inhibitor technology, which is applied in the fields of oilfield chemistry, new materials, chemical industry, and coatings, can solve the problems of human and natural environment hazards, carry-over, and unsuitable use of conventional corrosion inhibitors, and achieve improvement Corrosion inhibition effect, effect of expanding application range

Active Publication Date: 2018-12-04
CHANGSHU INSTITUTE OF TECHNOLOGY
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A preparation method of controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsules
  • A preparation method of controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsules

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Weigh dichloromethane, petroleum ether, Span 80 and cetyltrimethylammonium 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 respectively, and then adds a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo 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 rotation speed is 15000-20000r / min adjust the emulsification and dispersion for 10-15 minutes and then move it into the reaction kettle;

[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 collect the sampl...

Embodiment 2

[0029] (1) Weigh dichloromethane, petroleum ether, Span 80 and cetyltrimethylammonium bromide in a high-speed emulsifier, dichloromethane, petroleum ether, Span 80 and cetyl Trimethylammonium bromide accounts for 35%, 40.8%, 0.9%, 0.5% of the total weight of the feed respectively, and then adds a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo 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 / min adjust the emulsification and dispersion for 10-15 minutes and then move it into the reaction kettle;

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

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

Embodiment 3

[0033] (1) Weigh dichloromethane, petroleum ether, Span 80 and cetyltrimethylammonium 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 respectively, and then adds a certain mass ratio of styrene, methacrylic acid, glycidyl methacrylate and azo Diisobutyronitrile mixed solution, styrene, methacrylic acid, glycidyl methacrylate and azobisisobutyronitrile respectively account for 8%, 0.7%, 1.5%, 0.08% of the total weight of the feed, and the speed is 15000-20000r / min Adjust the emulsification and dispersion for 10-15 minutes and then move it into the reaction kettle;

[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 sample.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
Login to View More

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 oilfield chemistry, coatings, new materials and chemical engineering, and in particular relates to a preparation method of controllable long-acting slow-release sodium nitrite corrosion inhibitor microcapsules. Background technique [0002] Metal corrosion is a very common phenomenon in nature, such as iron parts 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 economic loss caused by corrosion in my country accounts for about 5% to 10% of the gross national product every year. The economic loss caused by corrosion in countries all over the world is far more than that caused by other natural disasters. total economic losses...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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