Vanconol®MNC-02 Acidizing Corrosion Inhibitor

Key Highlights

• Modified Mannich base product derived from acetophenone as starting material; active matter 50%

• Molecular structure contains hydrophilic hydroxyl groups, providing excellent dissolution rate and dispersion uniformity in concentrated hydrochloric acid and mud acid

• Measured corrosion rate of 5.2 g/(m²·h) under 90°C, 20% HCl conditions, compliant with SY/T 5405-2019

• Environmentally friendly and low toxicity; heavy-metal-free, organic-chlorine-free, and biodegradable

• Widely applied in oil & gas field acidizing, low-temperature corrosion protection in petrochemical refining, and industrial cleaning

1. Product Overview

1.1 Product Name and Model

Vanconol®MNC-02 Acetophenone Mannich Base

1.2 Product Positioning

Vanconol®MNC-02 is a novel high-efficiency corrosion inhibitor intermediate synthesized from acetophenone via Mannich reaction. The product adopts a proprietary preparation process that effectively suppresses side reactions and improves product purity. It is environmentally friendly, non-toxic, heavy-metal-free, and organic-chlorine-free, and can be used in formulating corrosion inhibitors for oil & gas fields and low-temperature corrosion protection in petrochemical refining.

1.3 Core Technical Principle

Vanconol®MNC-02 is a condensation product synthesized from acetophenone, aldehydes, and amines via Mannich reaction, forming a multi-point adsorption molecular structure:

The molecular structure exhibits the following corrosion inhibition mechanisms:

Structural Unit	Corrosion Inhibition Mechanism
Benzene ring π-electron system	Interacts with d orbitals of the metal surface, forming chemisorption anchoring points
Carbonyl group (C=O)	Lone-pair electrons coordinate with metal Fe atoms, enhancing adsorption strength
Tertiary amine group	Protonates to form cations under acidic conditions, enabling electrostatic adsorption onto the metal surface
Hydroxyl group (-OH)	Hydrophilic structure improving dissolution rate and dispersion uniformity in acid solutions

2. Product Properties and Technical Specifications

2.1 General Properties

Item	Specification	Test Method
Appearance (25°C)	Reddish-brown liquid	Visual inspection
Active matter (Mannich base)	50%	Gravimetric method
Solubility	Soluble in alcohols; readily soluble in acid solutions	—

2.2 Corrosion Inhibition Performance

Tested in accordance with SY/T 5405-2019 “Test Methods and Evaluation Criteria for Corrosion Inhibitors for Acidizing”, using the static coupon weight-loss method:

Test Conditions	Dosage	Corrosion Rate	Standard Requirement
90°C, 20% HCl, 4h	1.0%	5.2 g/(m²·h)	≤6.00 g/(m²·h)
120°C, 20% HCl, 4h	2.0%	To be tested	≤20.0 g/(m²·h)
90°C, Mud acid (12% HCl + 3% HF), 4h	1.0%	To be tested	≤8.00 g/(m²·h)

Note: The measured corrosion rate under 90°C, 20% HCl conditions is 5.2 g/(m²·h), compliant with SY/T 5405-2019 requirements.

2.3 Product Advantages and Benefits

Superior Solubility in Acid Solutions

Thanks to the hydrophilic hydroxyl structure incorporated into the molecule, this product exhibits excellent dissolution rate and dispersion uniformity in concentrated hydrochloric acid, mud acid, and other acidizing fluids, ensuring convenient field application and immediate efficacy of the additive.

Enhanced Corrosion Inhibition Efficiency

The optimized molecular structure improves adsorption density and film compactness on metal surfaces. At equivalent dosages, its corrosion protection efficiency outperforms conventional benzylamine-based Mannich base products, offering more reliable protection for metal equipment in demanding acidic environments.

Favorable Coordination and Film-Forming Properties

The nitrogen and oxygen functional groups in the molecule form stable coordination with metal ions and strongly adsorb onto metal surfaces, creating a dense hydrophobic film that physically blocks corrosive media—delivering direct and effective protection.

Good Chemical Stability

Retaining the stability of the Mannich base core structure, this product is resistant to degradation by acids, alkalis, and oxidants, maintaining long-lasting activity across various application environments.

Comprehensive Application Advantages

Combining rapid dissolution with high-efficiency corrosion inhibition, this product resolves the traditional trade-off between solubility and ultimate protection performance, making it a preferred solution for highly corrosive service conditions.

3. Comparative Advantages over Conventional Products

Comparison Item	Vanconol®MNC-02	Conventional Benzylamine Mannich Base
Primary amine feedstock	Water-soluble Mannich base (low toxicity)	Benzylamine/aniline (high toxicity)
Solubility in acid solutions	Excellent, no solubilizer required	Requires surfactant addition
Active matter	50%	40%~60%
Heavy metal content	None	Present in some products
Organic chlorine	None	Present in some products
Environmental friendliness	Biodegradable	Poorly biodegradable

4. Application Areas

Vanconol®MNC-02 is widely used in the following fields:

Crude Oil Production

Corrosion protection for downhole equipment, refining equipment, gathering pipelines, and storage tanks.

Industrial Cleaning

Preventing over-acid corrosion during acid cleaning operations.

Water Treatment

Preventing under-deposit corrosion in water supply purification, circulating water treatment, cooling water systems, and boiler water treatment.

Other Industries

Including power generation, textiles, and other sectors.

5. Usage Guidelines

5.1 Recommended Dosage

Application Scenario	Recommended Dosage (wt%)
Oil & gas acidizing (below 90°C)	0.8%~1.0%
Oil & gas acidizing (90–120°C)	1.5%~2.0%
Industrial cleaning	0.5%~1.0%
Circulating water treatment	50–200 ppm

5.2 Handling Recommendations

• Wear appropriate personal protective equipment before use

• Dilute the product directly with the acidizing fluid when in use

• Stir for 10–15 minutes after mixing to ensure uniform dispersion

5.3 Compatibility

Vanconol®MNC-02 exhibits good compatibility with the following acidizing additives:

Additive Type	Compatibility
Iron ion stabilizers (EDTA, citric acid)	Good
Clay stabilizers (KCl, polyquaternary ammonium salts)	Good
Flowback aids (fluorosurfactants)	Good
Mutual solvents (ethylene glycol monobutyl ether)	Good

6. Safety and Environmental

6.1 Product Safety

• Low toxicity: not classified as a hazardous chemical

• Heavy-metal-free: meets environmental requirements

• Organic-chlorine-free: eliminates chloride-induced corrosion risks

6.2 Safety Protection Measures

• Operator protection: wear protective goggles, acid-resistant gloves, and chemical-resistant coveralls

• Emergency response: rinse skin thoroughly with plenty of water immediately after contact; flush eyes with water for 15 minutes and seek medical attention

6.3 Environmental Properties

• Biodegradable: 28-day biodegradation rate >60%

• Environmentally friendly: free of persistent organic pollutants

7. Packaging and Storage

7.1 Packaging Specifications

Packaging Type	Specification	Net Weight
Plastic drum	220 L	Approx. 220 kg
Other packaging	Customized upon request	—

7.2 Storage Requirements

• Protect from sunlight, heat, moisture, and impact during storage and transport

• Store in a clean, cool, and dry warehouse

• Shelf life at ambient temperature: one year

• Seal containers tightly after partial use to prevent evaporation

7.3 Transportation Requirements

• Avoid severe impact, direct sunlight, and rain during transportation

• Transport as non-hazardous goods

8. Technical Support and Services

8.1 Technical Support Content

• On-site mixing guidance

• Corrosion inhibition performance monitoring and evaluation

• Acid formulation optimization recommendations

• Customized dosage scheme design

9. Product Statement

The data presented in this document are typical laboratory values. Actual field performance may vary depending on well conditions, acid formulation, and operational procedures. It is recommended that users conduct field pilot tests prior to initial use to determine the optimal dosage scheme.