What is N-Oleoylsarcosine?

What is N-Oleoylsarcosine ?

N-Oleoylsarcosine is a multifunctional N-acyl amino acid surfactant derived from oleic acid and sarcosine (N-methylglycine). It is known for its excellent corrosion inhibition, lubrication, emulsification and surface-active properties and is therefore an important ingredient in industrial lubricants, metal protection formulations, cosmetics and specialty chemical applications.

N-Oleoylsarcosine has a unique molecular arrangement with a long hydrophobic oleoyl chain and a polar sarcosine group which makes it able to interact with metal surfaces, oils and water phases. It is an excellent surfactant and oil soluble rust inhibitor.

N-Oleoylsarcosine - Chemical Information

How is N-Oleoylsarcosine Produced?

Industrial synthesis of N-Oleoylsarcosine is typically performed through the reaction of oleic acid derivatives with sarcosine.

1. Acylation by the Schotten-Baumann Method

A typical route of production is:

Preparation of oleyl chloride from oleic acid.
Reaction of sarcosine with oleoyl chloride in alkaline medium.
N-Oleoylsarcosine is obtained after neutralization and purification.

The reaction can be summarized by:  Oleic acid → Oleoyl chloride → N-Oleoyl sarcosine

The control of the pH during synthesis is important because the amino group of sarcosine should react efficiently with the acyl component and side reactions should be minimized.

2. Direct Condensation Process

Another method is a direct reaction between
· Oleic acid
· Sarcosine
under catalytic or high temperature conditions.

It is attractive because it minimizes the use of reactive acid chlorides and could provide a more environmentally friendly manufacturing process.

Main Applications of N-Oleoylsarcosine

1. Metal corrosion inhibitor

One of the most important applications of N-Oleoylsarcosine is an oil-soluble corrosion inhibitor.

It is commonly used in:

· Lubricating oils
· Lubricants
· Hydraulic Oils
· Metalworking fluids
· Additives to fuels
· Rust preventive oils.

The functional group of sarcosine is capable of adsorbing on metal surfaces, while the hydrophobic oleoyl chain creates a barrier to moisture and corrosive species from contacting the metal surface.

Advantages as corrosion inhibitor:

· Excellent anti-rust performance
·Works at low concentrations
· Good Compatibility with Mineral Oils
· Protection of steel, aluminum and copper alloys
· Surface adsorption durable

In the studies, it was shown that oleoylsarcosine derivatives exhibit high corrosion protection performance on low-carbon steel surface due to their ability to form protective adsorption layers.

2. Additive for lubricants and anti-friction additive

N-Oleoylsarcosine is widely used as a lubricant additive. It can reduce friction and wear.

Applications are:

· motor oils
· Industrial Lubricants
· Greases (gear oils)
· Refrigeration lubricants
· Metal forming lubricants

Its polar groups adsorb on the metal surface, forming a boundary lubrication film, and thus reduce metal-to-metal contact.

Benefits are:

· Enhanced antiwear properties
· Reduced friction coefficient
• Improved lubricant stability
• Improved protection in high pressure situations

3. Metalworking Fluids

N-Oleoylsarcosine is used in the machining and metal working industries for:

· Cutting oils
· Greases
· Grease for lubrication
· Lubricants 

As an emulsifier and corrosion inhibitor, its dual functionality keeps machining performance up while protecting equipment and finished metal parts

Benefits common to:

· Better dispersion of oil in water
· Reduced rust accumulation
· Longer life of the tool
· Better surface finish

4. Surfactants Applications

N-Oleoylsarcosine is an amino acid-based surfactant with mild surface activity.

It is available in:

· Products for personal care
· Cleaners
· Specialty detergents
· Emulsions 

Amino acid based surfactants are often preferred to conventional surfactants, because they are biodegradable and mild.

5. Cosmetics and personal care industry

In cosmetic formulations, N-Oleoylsarcosine can be used as:

· Surfactant
· Cleaning agent
· Hair conditioning agent
·Anti-static agent

It is prized for:

· Mild cleansing action
· Compatibility with cosmetic formulations
· Foam enhancing properties

Oleoyl sarcosine related ingredients are listed in the cosmetic ingredient databases as cleansing, hair conditioning, surfactant and antistatic agents.

6. Fuel & Petroleum Additives

N-Oleoylsarcosine is also used in petroleum related formulations as:

· Anti-rust agent
· Additive anticorrosivo
· Lubricity booster

Applications include :

· Petrol systems
· Diesel fuel
· Tanks
· Apparatus for transporting petroleum

It is oil soluble and might be effective in non-aqueous environments.

N-Oleoylsarcosine: Benefits

Good Adsorption at the Metal Surfaces

The polar sarcosine group forms a strong interaction with metal atoms and forms a molecular film to protect the metal.

Oil Compatibility

The long fatty chain gives excellent compatibility with:

· Oils, mineral.
· Lubricants (synthetic)
·Hydrocarbon systems

Eco-Friendly Profile

Amino acid based surfactants generally provide: relative to many conventional surfactants,

Good biodegradability

· Smaller environmental footprint
· The potential of renewable raw materials

Multi-functional Performance

A single additive can give:

· Corrosion resistance
· Improved lubrication
· Emulsification
· Finishing

Conclusion

N-Oleoylsarcosine: High-performance amino acid-based surfactant and corrosion inhibitor for various industrial applications Its unique amphiphilic structure enables excellent adsorption on metal surfaces, oil compatibility, lubrication enhancement and emulsification performance.

N-Oleoylsarcosine still plays an important role in the creation of more efficient and environmentally friendly chemical formulations from metal protection and lubricant additives to cosmetics and specialty surfactants.