Propargyl alcohol propoxylate is a highly effective organic corrosion inhibitor, commonly used in the oil and gas industry to prevent corrosion caused by acid gases such asH₂S and CO₂. This article details its usage and application scenarios.

1. How to use propargyl alcohol propoxylate 

Proargyl alcohol propoxylate is usually used in a compounded form rather than as a corrosion inhibitor alone.

(1) The advantages of compounding propargyl alcohol propoxylate are as follows:

A. Compounding propargyl alcohol propoxylate with other corrosion inhibitors (such as amines, imidazolines, organic phosphates, etc.) can produce a synergistic effect and 

improve corrosion inhibition performance.

B. Compounding can provide more comprehensive protection for complex corrosion environments (such as high temperature, high pressure, and high acidity).

C. Using propargyl alcohol propoxylate alone may be costly, and compounding can optimize cost-effectiveness.

(2) Common compounding combinations:

Proargyl alcohol propoxylate + imidazoline : used in acidic gas environments (H₂S and CO₂).

Proargyl alcohol ether + organic phosphate : used in highly salinized water environments.

Proargyl alcohol ether + amines: used for inner wall protection of pipelines and storage tanks.

Propargyl alcohol propoxylate + Mannich base: used for deep acidizing and acid fracturing of oil and gas wells, high-temperature deep wells/ultra-deep wells (120°C or even 

above 150°C), high-concentration acid systems (applicable to high-concentration hydrochloric acid systems such as 15%, 20%, and 28%).

Propargyl alcohol propoxylate + quinoline quaternary ammonium salt: used for acidizing and production increase measures of oil and gas wells, high-temperature deep wells/

ultra-deep wells (120°C or even above 150°C), high-concentration acid systems (applicable to high-concentration hydrochloric acid systems such as 15%, 20%, and 28%). 

Propargyl alcohol propoxylate + pyridinium quaternary ammonium salt: used for sandstone matrix acidizing or carbonate rock acid fracturing, high-temperature deep wells/

ultra-deep wells, high-concentration acid systems (applicable to high-concentration hydrochloric acid systems such as 15%, 20%, and 28%). 

(3) The amount of propargyl alcohol propoxylate added: generally in the range of 10% - 30% (wt%) of the total amount of the main corrosion inhibitor.

2. Application scenarios of propargyl alcohol propoxylate

Propargyl alcohol propoxylate is mainly used in the following corrosion protection scenarios in the oil and gas industry:

(1) Sour gas environment (H₂S and CO₂)

Application scenarios: oil and gas field production, natural gas processing, sour gas wells, oil and gas well acidification and production increase measures

Function: Prevent acid gas from corroding carbon steel equipment, especially under high temperature and high pressure conditions.

Features: propargyl alcohol propoxylate has excellent adsorption performance and film-forming ability in acidic environment.

(2) High temperature and high pressure environment

Application scenarios: deep wells, ultra-deep wells, high temperature and high pressure oil and gas fields.

Function: Under high temperature and high pressure conditions, propargyl alcohol propoxylate can still maintain stable corrosion inhibition performance.

Features: The alkynyl and ether groups in its molecular structure give it high thermal stability.

(3) Water injection system and pipeline

Application scenarios: water injection wells, oil pipelines, gathering and transportation systems.

Function: Prevent corrosive media in the water phase and oil phase from corroding metal equipment. Features: propargyl alcohol propoxylate can form a

dense protective film on the metal surface to prevent corrosive media from contacting the metal.

(4) High-mineralization water environment

Application scenarios: High-salinity formation water, seawater injection system.

Function: Prevent corrosion of metals by highly corrosive media such as chloride ions.

Features: Enhanced adaptability to high-mineralization water when used in combination.

(5) Refining and petrochemical equipment

Application scenarios: Distillation towers, heat exchangers, condensers and other equipment in refineries and petrochemical plants.

Function: Prevent corrosion caused by acidic media and high temperatures.

Features: propargyl alcohol propoxylate has a good corrosion inhibition effect on a variety of metals (such as carbon steel and stainless steel).

3. Advantages of propargyl alcohol propoxylate

High efficiency: Provides excellent corrosion inhibition effect at low concentrations.

Versatility: Applicable to a variety of corrosive environments (acidic, high temperature, high salinity, etc.).

Environmental protection: Compared with other corrosion inhibitors, it has lower toxicity and meets environmental protection requirements.

4. Precautions

Mix ratio: The mix ratio needs to be optimized according to the specific corrosive environment to achieve the best effect. Solubility: propargyl alcohol 

propoxylate has different solubilities in aqueous and oil phases, necessitating the selection of an appropriate solvent or carrier based on the specific application scenario.

Summary

Propargyl alcohol propoxylate is typically used in a blended form, primarily in sour gas environments, high-temperature and high-pressure conditions, water injection 

systems, highly saline water environments, and in refining and petrochemical equipment. Its high efficiency and versatility make it a valuable corrosion inhibitor in the

oil and gas industry. For more specific blending solutions or application examples, please refer to relevant technical literature or consult with your chemical supplier.