Method for preparing water-soluble high-temperature corrosion inhibitor

A high-temperature corrosion inhibitor, water-soluble technology, applied in the field of preparation of water-soluble high-temperature corrosion inhibitor, can solve the problems of elimination, secondary addition device influence, poor dispersion performance, etc., to prevent erosion, simple method, water-soluble Good results

Active Publication Date: 2013-03-13
江苏汉光实业股份有限公司 +1
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The corrosion damage of naphthenic acid to equipment is not only harmful to the equipment, but also has a serious impact on the secondary processing device. When naphthenic acid corrodes, serious acid iron is produced, which has a strong fine cleaning effect on the metal surface and brings FeS into the The secondary addition device will cause serious damage to the catalyst
[0004] At present, high-temperature corrosion inhibitors are mostly made of phosphorous acid, phosphate or phosphate ester, which are simple to make, but the addition amount is relatively large. Experiments have proved that the corrosion inhibition effect is not ideal when used alone.
Some corrosion inhibitor raw materials are poisonous, which will inevitably cause certain pollution to the environment, cannot be widely used, and some have even been eliminated
Corrosion inhibitors are mostly oil-soluble, and their dispersion performance in raw oil is not good, which is not conducive to the neutralization reaction with naphthenic acid in raw oil, resulting in unsatisfactory corrosion inhibition effect
Furthermore, there is a certain corrosion of the raw oil on the tower wall or pipe wall, and the existing corrosion inhibitors cannot solve this problem well

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
  • Method for preparing water-soluble high-temperature corrosion inhibitor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A water-soluble high-temperature corrosion inhibitor, composed of the following substances in mass percentage: 7.2% boric acid, 10.8% glycerin, 8.4% monoethanolamine, 30% sulfonated castor oil, and 43.6% water.

[0016] A kind of preparation method of water-soluble high-temperature corrosion inhibitor is:

[0017] (1) Preparation of anti-rust complex: Accurately weigh 120kg of water, 240kg of boric acid, and 360kg of glycerin in proportion to add to the reaction kettle, heat up to 50°C, add 280kg of monoethanolamine, then heat up to boiling, reflux for 2 hours, and then cool down to 46°C , Serve as anti-rust complex;

[0018] (2) Ingredients: pump 300kg of sulfonated castor oil and 300kg of the anti-rust complexing agent obtained in step (1) into the reactor, heat up to 100°C and stir for 30 minutes, cool down to 50°C, add 400kg of water, stir evenly to become water-soluble High temperature corrosion inhibitor.

Embodiment 2

[0020] A water-soluble high-temperature corrosion inhibitor, composed of the following substances in mass percentage: 6.5% boric acid, 10.3% glycerin, 7.9% monoethanolamine, 35% sulfonated castor oil, and 40.3% water.

[0021] A kind of preparation method of water-soluble high-temperature corrosion inhibitor is:

[0022] (1) Preparation of anti-rust complex: Accurately weigh 18kg of water, 65kg of boric acid, and 103kg of glycerin into the reactor, heat up to 50°C, add 79kg of monoethanolamine, then heat up to boiling, reflux for 2 hours, and then cool down to 48°C , Serve as anti-rust complex;

[0023] (2) Ingredients: pump 350kg sulfonated castor oil and 265kg anti-rust complexing agent obtained in step (1) into the reactor, heat up to 100°C and stir for 30 minutes, cool down to 50°C, add 385kg of water, stir evenly to become water-soluble High temperature corrosion inhibitor.

Embodiment 3

[0025] A water-soluble high-temperature corrosion inhibitor, consisting of the following substances in mass percentage: 7.5% boric acid, 11% glycerin, 8.1% monoethanolamine, 29% sulfonated castor oil, and 44.4% water.

[0026] A kind of preparation method of water-soluble high-temperature corrosion inhibitor is:

[0027] (1) Preparation of anti-rust complex: Accurately weigh 34kg of water, 75kg of boric acid, and 110kg of glycerin in proportion to add to the reaction kettle, heat up to 50°C, add 81kg of monoethanolamine, then heat up to boiling, reflux for 2 hours, and then cool down to 40°C , Serve as anti-rust complex;

[0028] (2) Ingredients: pump 290kg of sulfonated castor oil and 300kg of the anti-rust complexing agent obtained in step (1) into the reactor, heat up to 100°C and stir for 30 minutes, cool down to 50°C, add 410kg of water, stir evenly to become water-soluble High temperature corrosion inhibitor.

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 discloses a method for preparing a water-soluble high-temperature corrosion inhibitor, which comprises the following steps: (1) antirust complex preparation: accurately weighting water, a boric acid and glycerin in proportion, adding the weighted water, boric acid and glycerin into a reaction kettle, heating the reaction kettle and adding monoethanolamine into the reaction kettle, heating the obtained mixture until the obtained mixture is boiled, flowing back and then cooling the obtained object so as to obtain an anti-rust complex; and (2) dosing: pumping sulfonated castor oil and the antirust complex obtained in the step (1) into a reaction kettle, heating and stirring the obtained mixture, cooling the obtained mixture and adding water into the obtained mixture, uniformly stirring the obtained product so as to obtain a water-soluble high-temperature corrosion inhibitor. The water-soluble high-temperature corrosion inhibitor prepared by using the method disclosed by the invention is good in water-solubility, no cosolvent is not required to be added when the corrosion inhibitor is used in a formula, and no laying phenomenon occurs when the corrosion inhibitor is compounded with any organic amine, thereby facilitating a neutralization reaction between the corrosion inhibitor and a naphthenic acid in raw oil; and the antirust complex of the corrosion inhibitor in the invention and the sulfonated castor oil can form a dense and firm protective film in a high-temperature tower, thereby effectively preventing the raw oil from eroding the inner wall of the tower.

Description

technical field [0001] The invention belongs to the technical field of metal corrosion and protection, and in particular relates to a preparation method of a water-soluble high-temperature corrosion inhibitor. Background technique [0002] As the main equipment material, metal is widely used in the industry, and the application of corrosion and protection of metal materials is becoming more and more extensive. One of the effective ways to solve the corrosion of metal materials is to use corrosion inhibitors to protect metals. [0003] Naphthenic acid is an organic acid with saturated ring structure widely present in crude oil. In the crude oil refining process, naphthenic acid usually causes corrosion damage to the refining equipment system and pipeline, and is related to the total acid number (TAN) of crude oil in the processing process. When the TAN is greater than 0.2, the naphthenic acid is Corrosion occurs, and significant corrosion occurs when TAN is greater than 0.5,...

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
IPC IPC(8): C23F11/00
Inventor 顾法明
Owner 江苏汉光实业股份有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap