Aryl ether cobasestocks for additive solubility in PAO oils
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Solution Overview
Problem
Current lubricant basestocks, such as PAOs and GTL, have low polarity, leading to poor solubility and dispersancy of polar additives and sludge, necessitating the use of cobasestocks to improve these properties.
Innovation Solution
Development of oxygen-containing, hydrolytically stable aryl ether compounds with precise hydrocarbon and ether segments, which are used as cobasestocks to enhance the solubility and dispersancy of polar additives and sludge in lubricating oils, while also providing improved lubricant properties and fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PAOs or GTL stocks are used as basestocks, then high viscosity index is achieved, but low polarity leads to poor solubility and dispersancy for polar additives and sludge
Solution Approach 1:
The patent combines PAO or GTL basestock with a polar cobasestock component to create a composite lubricating oil formulation. This composite approach allows the non-polar basestock to provide high viscosity index while the polar cobasestock component (containing oxygen functionality) provides improved solubility and dispersancy for polar additives and sludge, thus resolving the contradiction between viscosity index and solubility properties
Solution Approach 2:
The patent introduces a specific polar cobasestock component with oxygen functionality into the lubricating oil formulation to locally address the solubility issue. This component is present in a specific amount (0.1-10% by weight) to provide the necessary polarity for additive solubility without compromising the overall viscosity index provided by the main PAO or GTL basestock
2Object-generated harmful factors
If cobasestocks are added to improve additive solubility, then solubility and dispersancy are enhanced, but fuel economy may be reduced due to increased viscosity
Solution Approach 1:
The patent carefully controls the amount of polar cobasestock component within a specific range (0.1-10% by weight) to optimize the balance between solubility enhancement and fuel economy. By adjusting this parameter, the formulation achieves sufficient additive solubility and dispersancy while minimizing the impact on viscosity and fuel consumption
Solution Approach 2:
The patent uses a specifically designed polar cobasestock component with oxygen functionality that provides high solubility effectiveness per unit concentration. This allows achieving the required additive solubility with minimal amounts of the polar component, thereby reducing the impact on overall oil viscosity and preserving fuel economy
Data Source
AI summary
This disclosure provides low viscosity, low volatility aryl ether compounds represented by the formula:This disclosure also provides processes for producing the aryl ether compounds, lubricating oil basestocks and lubricating oils containing one or more of the aryl ether compounds, and a method for improving one or more of solubility and dispersancy of polar additives and/or sludge in a lubricating oil by using as the lubricating oil a formulated oil containing one or more of the aryl ether compounds.