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

Rosin imidazoline quaternary ammonium salt compound, corrosion inhibitor and preparation method

A technology of quaternary ammonium salt compound and rosin imidazoline, which is applied in the field of anti-corrosion of oil and gas fields, can solve the problems of troublesome recovery and utilization of condensate oil, reduced anti-corrosion effect, local corrosion, etc., and achieves good water-phase anti-corrosion effect, enhanced adsorption capacity and distribution. well-proportioned effect

Active Publication Date: 2018-11-02
PETROCHINA CO LTD
View PDF6 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in condensate gas reservoirs, oil-soluble corrosion inhibitors are easy to migrate into condensate oil, resulting in a decrease in the number of corrosion inhibitor molecules adsorbed on the metal surface, which directly reduces the anti-corrosion effect and even causes localized corrosion.
[0006] At the same time, in the process of high pressure and high flow rate production, the three-phase system composed of condensate oil, gas field water and corrosion inhibitor is prone to emulsification, which causes troubles for the recovery and utilization of condensate oil

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
  • Rosin imidazoline quaternary ammonium salt compound, corrosion inhibitor and preparation method
  • Rosin imidazoline quaternary ammonium salt compound, corrosion inhibitor and preparation method
  • Rosin imidazoline quaternary ammonium salt compound, corrosion inhibitor and preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0036] In the second aspect, the embodiment of the present invention provides the preparation method of the above-mentioned rosin imidazoline quaternary ammonium salt compound, and the specific steps are as follows:

[0037] Step 101, add rosin acid, diethylenetriamine and water-carrying agent to the reaction vessel, carry out dehydration reaction at 160-180 ° C for 2-2.5 hours, then heat up to 200-240 ° C, carry out cyclization reaction for 3-4 hours , heating to steam out the water in the cyclization reaction product, and cooling to obtain rosin imidazoline.

[0038] Wherein, the molar ratio of rosin acid and diethylenetriamine is 1:(1.1-1.2); the water-carrying agent is 20-30% of the total mass of rosin acid and diethylenetriamine.

[0039] Step 102, heating the rosin imidazoline to 70-90 ° C, dropwise adding diisooctyl phosphate, mixing uniformly, then heating up to 120-130 ° C, reacting for 2-2.5 hours, and finally cooling the reaction product to obtain the rosin imidazol...

Embodiment 1

[0070] The present embodiment provides a rosin imidazoline quaternary ammonium salt compound, and its chemical structural formula is:

[0071]

[0072] The rosin imidazoline quaternary ammonium salt compound is prepared by the following method:

[0073] Step (1), preparation of rosin imidazoline

[0074] To a four-necked flask equipped with a stirrer, thermometer, water separator, condenser and nitrogen protection, 0.5 mol of rosin acid, 0.6 mol of diethylenetriamine and 50 g of xylene were sequentially added, and the reaction was carried out at 180 °C for 2 h. Then, the temperature was gradually raised to 220 °C, and the reaction was carried out at this temperature for 4 h. Finally cooled to room temperature to obtain rosin imidazoline.

[0075] Step (2), preparation of rosin imidazoline quaternary ammonium salt compound

[0076] The above-mentioned rosin imidazoline was gradually heated to 80° C., and then 0.65 moles of diisooctyl phosphate was gradually added to the f...

Embodiment 2

[0078] This embodiment provides a metal corrosion inhibitor, and the metal corrosion inhibitor includes the following components by weight:

[0079] 23 parts of rosin imidazoline quaternary ammonium salt compound, 2 parts of surfactant, 5 parts of auxiliary agent, 0.1 part of demulsifier, and the balance of solvent oil prepared in Example 1.

[0080] The metal corrosion inhibitor is prepared by the following method:

[0081] Step , stirring 1 g of demulsifier and 99 g of solvent oil at room temperature to obtain a concentrated solution of demulsifier, the concentration of which is 1% by weight.

[0082] Step , take 10 g of the above demulsifier concentrate, dilute with 60 g of solvent oil, to obtain a diluted demulsifier solution.

[0083] Step , add 23 g of rosin imidazoline quaternary ammonium salt compound to the diluted demulsifier solution, stir evenly at 40° C. with a stirring speed of 150 rpm, and then cool to room temperature to obtain an intermediate solution.

[0084...

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 rosin imidazoline quaternary ammonium salt compound, a corrosion inhibitor and a preparation method and belongs to the field of corrosion prevention of oil and gas field. Thestructural formula of the rosin imidazoline quaternary ammonium salt compound is shown in the description. The rosin imidazoline quaternary ammonium salt compound provided by the embodiment of the invention is characterized in that a p heteroatom with higher adsorption capacity is introduced into a molecular structure, so that the adsorption capacity of the compound on the metal surface is further enhanced; by introducing two 8-carbon-number alkyl chains, integral hydrophilic and hydrophobic properties of the compound are balanced, the condition that the corrosion preventing effect is reduceddue to the fact that the compound is washed out by a flowing medium (gas-field water) from the metal surface is not easy to be caused, or the phenomenon that the number of corrosion inhibitor molecules migrating to an aqueous phase and the metal surface is excessively reduced caused by existence of condensate oil is avoided. Besides, when the rosin imidazoline quaternary ammonium salt compound isapplied to a sour gas condensate reservoir, the gas-field water and the condensate oil are not easy to emulsify by using an irregular branched structure of the rosin imidazoline quaternary ammonium salt compound.

Description

technical field [0001] The invention relates to the field of anti-corrosion of oil and gas fields, in particular to a rosin imidazoline quaternary ammonium salt compound, a corrosion inhibitor and a preparation method. Background technique [0002] During the mining process of sour gas reservoirs, the metal equipment and pipelines used for oil and gas production and transportation are easily corroded and fail. At present, metal corrosion inhibitors are mostly used to perform anti-corrosion operations on the above-mentioned metal equipment and pipelines. Therefore, it is very necessary to provide a metal corrosion inhibitor suitable for acid gas reservoirs. [0003] Chinese patent CN101050537A discloses a corrosion inhibitor suitable for highly acidic gas reservoirs. The corrosion inhibitor is composed of sulfur-containing imidazoline derivatives, auxiliary agents, surfactants and solvent oil. Chinese patent CN105272916A discloses a novel rosin-based imidazoline corrosion in...

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): C07D233/16C07F9/38C09K8/54C23F11/167
CPCC07D233/16C07F9/38C09K8/54C23F11/167
Inventor 江晶晶张东岳谷坛张强唐永帆陈文袁曦黄刚华肖杰彭芳
Owner PETROCHINA CO LTD
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