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

Water-soluble corrosion inhibitor, preparation and application thereof

A corrosion inhibitor, water-soluble technology, used in the treatment of equipment corrosion/fouling inhibition, petroleum industry, hydrocarbon oil treatment, etc., can solve the problem of narrow use range, and achieve low cost, good water solubility, low toxicity and no odor on site effect of operation

Inactive Publication Date: 2008-10-08
LUOYANG PETROCHEMICAL ENG CORP SINOPEC
View PDF6 Cites 47 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the disadvantages of the narrow pH range of the corrosion inhibitor in the prior art, and provides a novel water-soluble corrosion inhibitor, which can be used for metal materials in a medium with a wide pH value change (pH=1-10). Corrosion inhibition effect, and has good metal surface film-forming performance

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
  • Water-soluble corrosion inhibitor, preparation and application thereof
  • Water-soluble corrosion inhibitor, preparation and application thereof
  • Water-soluble corrosion inhibitor, preparation and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Put oleic acid and diethylenetriamine into the reactor according to the molar ratio of 1:1.1, add boric acid accounting for 0.2% by weight of the feeding amount, gradually raise the temperature to 230° C. under constant stirring, and the temperature rise reaction time is 4 hours to obtain the imidazoline intermediate . Then the imidazoline intermediate and thiourea are added to the reactor according to the molar ratio of 1:1, and 15% by weight of n-hexanol accounting for the total weight of the imidazoline intermediate and thiourea is added, and the reaction is carried out at a temperature of 140 to 170° C. for 3 hours After cooling to below 60°C, slowly add benzyl chloride reagent according to the molar ratio of 1:1.5, react at 90-110°C for 3 hours after the addition, and obtain a brown imidazoline derivative A after cooling.

Embodiment 2

[0044] According to the method similar to the preparation of imidazoline derivative A in Example 1, triethylenetetramine was used instead of diethylenetriamine to prepare imidazoline derivative B.

Embodiment 3

[0046] According to the method similar to the preparation of imidazoline derivative A in Example 1, oleic acid was replaced by linoleic acid to prepare imidazoline derivative C.

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 water soluble corrosion inhibitor, the preparation method and the application of the corrosion inhibitor, solving the defect of narrow application range of the corrosion inhibitor pH in the prior art; the water soluble corrosion inhibitor is composed of 20-70 weight proportion of imidazolines derivates, 1-10 weight proportion of pyridine derivates, 1-20 weight proportion of corrosion inhibition auxiliary agent and 10-50 weight proportion of solvent, based on the total weight of the corrosion inhibitor as the reference. The water soluble corrosion inhibitor in the invention has corrosion inhibition effect on the metal material in the medium with wide PH variation range (pH equals to 1-10) and good metal surface film formation property.

Description

Technical field [0001] The invention belongs to the field of metal corrosion inhibition, and more specifically relates to a water-soluble corrosion inhibitor for preventing equipment corrosion in low-temperature light oil parts of a refinery and its preparation method and application. Background technique [0002] With the in-depth development of crude oil, the proportion of low-quality crude oil is increasing, causing the corrosion problem of refinery equipment to become increasingly serious. Among them, the corrosion of equipment in the low-temperature light oil parts of primary and secondary processing units is particularly prominent, such as the top of the atmospheric and vacuum unit. Condensation cooling system, catalytic cracking stable absorption system and delayed coking fractionation tower top condensation cooling system. The corrosion of the condensation cooling system at the top of the atmospheric and vacuum unit is mainly due to H 2 S-HCl-H 2 O-type corrosion, ...

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 Applications(China)
IPC IPC(8): C10G75/02
Inventor 于凤昌段永锋彭松梓李春贤王红梅
Owner LUOYANG PETROCHEMICAL ENG CORP SINOPEC
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