Guanidinium Ionic Liquid Marine Lubricant Additive

Solution Overview

Problem

Current marine lubricants face challenges in effectively neutralizing sulfuric acid and preventing corrosion and deposit formation in marine engines, particularly when dealing with high-sulfur and low-sulfur fuels, and require improved detergency and thermal resistance.

Innovation Solution

A guanidinium-based ionic liquid is introduced as a detergent additive in lubricant compositions for marine engines, which provides enhanced neutralization capacity, anti-corrosion properties, and reduced deposit formation, formulated with 1,1,3,3-tetramethylguanidinium and specific anionic species, combined with base oils and traditional detergents to achieve a balanced Total Base Number (TBN) and improved engine cleanliness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If traditional neutral and overbased detergents are used to neutralize sulfuric acid, then the neutralization capacity is improved, but the thermal resistance deteriorates leading to increased deposit formation

Engineering Contradiction:

Improveneutralization capacityVSAvoiddeposit formation

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The invention changes the chemical composition parameters by introducing guanidinium-based ionic liquids with specific molecular structures (formula I) that have superior thermal stability compared to traditional detergents. This parameter change allows achieving both high neutralization capacity and resistance to deposit formation under thermal stress

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite detergent system combining guanidinium-based ionic liquids with traditional neutral and overbased detergents in specific proportions. This composite approach synergistically combines the high neutralization capacity of overbased detergents with the thermal stability and low deposit-forming tendency of ionic liquids

Inventive Principle:

Principle #40Composite materials

2Object-affected harmful factors

If the Basic Number (BN) is increased to neutralize high-sulfur fuel, then the neutralization capacity is improved, but the thermal resistance deteriorates

Engineering Contradiction:

Improveneutralization capacityVSAvoidthermal resistance

Core Design Contradiction:

Object-affected harmful factorsVSTemperature

Solution Approach 1:

The invention changes the chemical composition parameters by introducing guanidinium-based ionic liquids with specific molecular structures (formula I) that have superior thermal stability compared to traditional detergents. This parameter change allows achieving both high neutralization capacity and resistance to deposit formation under thermal stress

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The guanidinium-based ionic liquid acts as an intermediary substance that mediates between the conflicting requirements of high BN and thermal stability. It provides a bridge function by contributing to neutralization capacity while simultaneously improving thermal resistance, thus resolving the contradiction between these two parameters

Inventive Principle:

Principle #24Intermediary (Mediator)

3Adaptability or versatility

If a single detergent formulation is used for both high-sulfur and low-sulfur fuels, then the adaptability is improved, but the neutralization capacity becomes insufficient for high-sulfur conditions

Engineering Contradiction:

Improvefuel compatibilityVSAvoidneutralization capacity

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The invention creates a universal detergent formulation based on guanidinium-based ionic liquids that can effectively serve both high-sulfur and low-sulfur fuel conditions. The ionic liquid's unique molecular structure provides multi-functional capability, delivering adequate neutralization capacity across different fuel sulfur contents while maintaining thermal stability

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The invention changes the chemical composition parameters by introducing guanidinium-based ionic liquids with specific molecular structures (formula I) that have superior thermal stability compared to traditional detergents. This parameter change allows achieving both high neutralization capacity and resistance to deposit formation under thermal stress

Inventive Principle:

Principle #35Parameter changes

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The guanidinium-based ionic liquid significantly improves detergency and anti-corrosion performance, effectively neutralizing sulfuric acid and reducing deposit formation in marine engines, regardless of fuel sulfur content, while maintaining thermal resistance and engine cleanliness.

Implementation Method 1

these acids must be neutralized, which is generally done by reaction with the basic sites included in the lubricant

Methodology Applied

Scientific EffectNeutralization reaction: Chemical Bonding

Data Source

PatentUS12122973B2Guanidinium-based ionic liquid and its use as a lubricant additive

Publication Date: 2024.10.22 TOTALENERGIES ONETECH

AI summary

A guanidinium-based ionic liquid compound including a 1,1,3,3-tetramethylguanidinium cation and an alcoholate anion. A lubricant composition including it, and its use as a detergent and as anti-corrosion additive in a lubricant composition, in particular a marine lubricant.