Lubricating Oil Composition with Controlled Distillation Gradient
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Solution Overview
Problem
Lubricating oil compositions used in high-temperature environments, such as turbines and rotary gas compressors, face challenges with oxidation stability and sludge generation, leading to reduced lifespan and equipment damage.
Innovation Solution
A lubricating oil composition containing a mineral base oil with a controlled temperature gradient and a blend of amine-based, phenol-based, and phosphorus-based antioxidants, which suppresses sludge formation and maintains oxidation stability over long periods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a lubricating oil composition is used in a high-temperature environment, then the lubrication function is provided, but the anti-oxidation performance gradually decreases and oxidation stability deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters of the antioxidant package by specifying precise content ranges for amine-based antioxidant (0.1-3.0 wt%), phenol-based antioxidant (0.1-2.0 wt%), and phosphorus-based antioxidant (0.05-0.5 wt%). This parameter optimization resolves the contradiction by creating an antioxidant system that maintains effectiveness at high temperatures while preserving oxidation stability.
Solution Approach 2:
The patent creates a composite antioxidant system combining three different types of antioxidants (amine-based, phenol-based, and phosphorus-based) in specific ratios. This composite approach resolves the technical contradiction by leveraging the synergistic effects of different antioxidant mechanisms, providing both high-temperature resistance and sustained oxidation stability.
2Duration of action of stationary object
If a lubricating oil composition is used for a long period of time, then continuous lubrication is provided, but sludge generation increases and equipment damage occurs
Solution Approach 1:
The patent introduces a specifically formulated antioxidant package as an intermediary substance that prevents the direct reaction between the lubricating oil and oxygen over long periods. The combination of amine-based, phenol-based, and phosphorus-based antioxidants acts as a mediator to scavenge free radicals and prevent sludge-forming oxidation reactions, enabling long-term use without sludge generation.
Solution Approach 2:
The patent optimizes the concentration parameters of the antioxidant components to prevent sludge formation during long-term use. By controlling the amine-based antioxidant at 0.1-3.0 wt%, phenol-based at 0.1-2.0 wt%, and phosphorus-based at 0.05-0.5 wt%, the system maintains stability over extended periods without generating harmful sludge deposits.
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 composition achieves excellent oxidation stability and significantly reduces sludge generation, extending the lifespan of lubricating oils in high-temperature environments and preventing equipment damage.
Implementation Method 1
anti-oxidation performance gradually decreases
Implementation Method 2
an antioxidant (B) containing an amine-based antioxidant (B1), a phenol-based antioxidant (B2), and a phosphorus-based antioxidant (B3)
Data Source
AI summary
Provided is a lubricating oil composition containing a mineral base oil (A) having a temperature gradient Δ|Dt| of a distillation temperature between two points of a distillation amount of 2.0% by volume and a distillation amount of 5.0% by volume in a distillation curve of 6.8° C./% by volume or less, and an antioxidant (B) containing an amine-based antioxidant (B1), a phenol-based antioxidant (B2), and a phosphorus-based antioxidant (B3), wherein the content of the component (B3) is 0.06 to 1.0% by mass based on the total amount of the lubricating oil composition. The lubricating oil composition is a long-life lubricating oil composition that maintains excellent oxidation stability even for long-term use in a high-temperature environment, and has a high effect of suppressing the generation of sludge for a long period of time.