1. Gas Hydrate Mitigation (Flow Assurance) 

DDBAC acts as a highly effective Low Dosage Hydrate Inhibitor (LDHI), specifically acting as an Anti-Agglomerant (AA) and a Kinetic Hydrate Inhibitor (KHI). 

• Anti-Agglomeration: It prevents small hydrate crystals from sticking together and plugging pipelines by making the hydrate surfaces hydrophobic and soft, allowing them to disperse in the oil phase.
• Performance: A concentration of around 0.35 wt% has been shown to effectively inhibit methane hydrate growth and agglomeration in oil-water systems, providing stable flow assurance.
• Advantage: It works efficiently in high-subcooling conditions (deep-offshore) where traditional inhibitors (like methanol) fail or are too expensive. 

2. Microbiological Control (Biocide)

DDBAC is a powerful broad-spectrum biocide used to control microbial growth, particularly Sulfate-Reducing Bacteria (SRB), which cause severe corrosion and souring in pipelines and storage tanks. 

• Water Treatment: It is used in oilfield water injection systems and produced water treatment to eliminate algae and bacteria.
• Slime Removal: It possesses good slime-stripping properties, preventing bacterial slime from coating pipes and reducing efficiency.
• Dosage: As a bactericidal algaecide, a concentration of 50–100 mg/L is generally used, while 200–300 mg/L is used for sludge removal. 

3. Corrosion Inhibition

DDBAC serves as a cationic corrosion inhibitor that forms a protective, hydrophobic layer on metal surfaces (such as steel or aluminum alloys), shielding them from corrosive agents in water and oil. 

• Mechanism: Its molecules adsorb onto the metal surface, creating a barrier that interrupts the electrochemical corrosion process.
• Application: It is particularly effective for protecting equipment in environments

4. Demulsification and Oil Processing

DDBAC is used in oil treatment, specifically for breaking down emulsions in sour crude oil. 

• Emulsion Breaking: It functions as a demulsifier and helps in the separation of oil and water, reducing the emulsification problems associated with, for example, the alkali washing of sour crude oil.
• Phase Transfer Catalyst: It is used as a phase transfer catalyst in refining processes to improve reaction rates

Primary CAS Number: 139-07-1

Other CAS Numbers: 8001-54-5, 63449-41-2

Formula: C21H38ClN

Molecular Weight: 339.99

Synonyms: Benzododecinium chloride, Benzyldimethyldodecylammonium chloride, Lauryl dimethyl benzyl ammonium chloride.