Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A gas-liquid double-effect supramolecular corrosion inhibitor for protecting condensate pipeline steel and its preparation method

A gas-liquid double-effect, condensate pipe technology, applied in the field of metal corrosion and protection, can solve the problems that supramolecular chemistry has not been fully reflected in the development and application of corrosion inhibitors, and achieve the solution of gas-liquid two-phase corrosion problems, high efficiency Welding grooves and gaps, effects of protecting welding grooves and gaps

Active Publication Date: 2019-11-19
BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, supramolecular chemistry has not been fully reflected in the development and application of corrosion inhibitors.

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 gas-liquid double-effect supramolecular corrosion inhibitor for protecting condensate pipeline steel and its preparation method
  • A gas-liquid double-effect supramolecular corrosion inhibitor for protecting condensate pipeline steel and its preparation method
  • A gas-liquid double-effect supramolecular corrosion inhibitor for protecting condensate pipeline steel and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Completely dissolve 10g of 2,6-di-O-(2-hydroxypropyl)-β-cyclodextrin in an appropriate amount of deionized water at 40°C, slowly add 2.7mL (about 2.6 g) Glutaraldehyde and keep stirring for 50min; then increase the stirring rate to 2000r / min, evenly add 4.8mL (about 5g) cinnamaldehyde dropwise, and continue stirring for 60min; Refrigerate for 30 minutes, filter out the crystals and freeze-dry to obtain the 2,6-di-O-(2-hydroxypropyl)-β-cyclodextrin network body through the bridge induced by glutaraldehyde and cinnamaldehyde. Supramolecular corrosion inhibitor formed by "non-covalent bond".

[0026] The supramolecular corrosion inhibitor prepared above and the corresponding raw materials were carried out 1 H nuclear magnetic resonance analysis, the results are as follows figure 1 shown. Put the supramolecular corrosion inhibitor prepared above into the steam condensate water system of thermal power generation in the amount of 60mg / L, measure by gravimetric method, the ...

Embodiment 2

[0028] Completely dissolve 15g of β-cyclodextrin in an appropriate amount of deionized water at 60°C, slowly add 6.7mL (about 7.5g) of ethylene glycol dropwise at a stirring rate of 1200r / min and continue stirring for 30min; then increase the stirring rate to 1500r / min / min, and evenly drop 22mL (about 20g) of dicyclohexylamine, and continue to stir for 90min; Supramolecular corrosion inhibitor formed by diol-induced bridged β-cyclodextrin network host and dicyclohexylamine through "non-covalent bond" interaction.

[0029] The supramolecular corrosion inhibitor prepared above was put into the steam condensate system of thermal power generation in the amount of 80 mg / L, and the pipeline steel in the gas and liquid phases were sampled for X-ray diffraction analysis. The results are as follows: figure 2 shown. The supramolecular corrosion inhibitor prepared above is put into the steam condensate water system of thermal power generation in the amount of 80mg / L, and measured by g...

Embodiment 3

[0031] Completely dissolve 12g of γ-cyclodextrin in an appropriate amount of deionized water at 30°C, slowly add 6.1mL (about 4.8g) of ethanol dropwise at a stirring rate of 1000r / min and continue stirring for 60min; then increase the stirring rate to 1800r / min , and evenly added 7.9mL (about 7.2g) of dicyclohexylamine dropwise, and continued to stir for 120min; Supramolecular corrosion inhibitor formed by ethanol-induced bridged γ-cyclodextrin network host and dicyclohexylamine through "non-covalent bond" interaction.

[0032] Put the supramolecular corrosion inhibitor prepared above in an amount of 20mg / L into the steam condensate system of thermal power generation, take samples of the pipeline steel in gas and liquid phases respectively, and observe the surface morphology through scanning electron microscope, the results are as follows image 3 shown. Put the supramolecular corrosion inhibitor prepared above into the steam condensate water system of thermal power generatio...

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

No PUM Login to View More

Abstract

The invention relates to a gas-liquid double-effect supramolecular corrosion inhibitor used for protecting condensate water pipe line steel and a preparation method thereof. The preparation method comprises the following steps: 30-70 parts by mass of cyclodextrin and derivatives form a network-like body under the effect of 10-20 parts by mass of an inductive bridging agent, and the network-like body is then subjected to noncovalent interaction with 20-40 parts by mass of oily corrosion inhibition components to form a supramolecular system with a subject and object structure. According to the gas-liquid double-effect supramolecular corrosion inhibitor used for protecting condensate water pipe line steel and the preparation method thereof, the preparation method of the supramolecular corrosion inhibitor is simple and convenient, the reaction condition is mild, the parts, being exposed to gas phase and immersed in liquid phase, of the condensate water pipe line steel are effectively protected.

Description

technical field [0001] The invention belongs to the field of metal corrosion and protection, in particular to a gas-liquid double-effect supramolecular corrosion inhibitor for protecting condensed water pipeline steel and a preparation method thereof. Background technique [0002] Condensed water is demineralized water formed by condensation of steam in the heat production process. In order to save water resources and avoid thermal pollution of the environment, most of the steam condensate water is often recycled as boiler make-up water in the production line. However, the theoretically pure steam condensate has poor anti-pollution ability: outside O 2 , CO 2 Factors such as dissolution and decomposition of carbonate or bicarbonate entrained by the steam generation source will make the condensed water weakly acidic. Acidic steam condensate will cause electrochemical corrosion and high temperature oxygen corrosion to the pipeline, and the corrosion products of pipeline ste...

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): C23F11/02C23F11/173
CPCC23F11/02C23F11/173
Inventor 樊保民翁云宣冯云皓位博宇杨兴海窦东坡
Owner BEIJING TECHNOLOGY AND BUSINESS UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com