Aromatic Detergent Salts for Lubricants Free of C12 Alkyl Phenols
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Solution Overview
Problem
There is a need for phenolic materials that maintain appropriate oil solubility while providing anti-wear, oxidation, viscosity, and detergency performance, and are free from or substantially free from C12 alkyl phenol moieties due to environmental concerns.
Innovation Solution
A lubricating composition comprising an oil of lubricating viscosity and 0.2 wt % to 10 wt % of a salt of an aromatic compound, where the aromatic compound is represented by specific formulas and is further defined by its TBN and metal ratio, providing the necessary performance characteristics without C12 alkyl phenol moieties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If alkylphenol detergents based on propylene oligomers are used to provide oil solubility and detergency performance, then oil solubility and detergency are improved, but endocrine disruption and environmental harm occur
Solution Approach 1:
The patent changes the chemical parameters of the detergent by replacing propylene oligomer alkyl groups with alternative alkylating agents such as normal olefins, isomerized olefins, or alpha-olefins containing 10-30 carbon atoms. This parameter change maintains the oil solubility and detergency performance while eliminating the endocrine-disrupting C12 alkyl phenol moieties associated with propylene oligomers
Solution Approach 2:
The patent substitutes environmentally harmful alkylphenol structures with alternative detergent structures that achieve the same functional performance without the harmful effects. The alternative alkylating agents provide comparable oil solubility and detergency properties while being environmentally benign, effectively replacing the harmful substance with a functional equivalent
2Quantity of substance
If C10-15 propylene oligomers are used as alkylating agents to achieve desired oil solubility, then oil solubility is improved, but residual alkyl phenol species with endocrine disruptive properties remain
Solution Approach 1:
The patent extracts and eliminates the harmful C10-15 propylene oligomer components from the alkylating agent mixture by selecting alternative alkylating agents with different carbon chain distributions. The new alkylating agents provide the necessary oil solubility without generating residual alkyl phenol species in the problematic C10-15 range that exhibit endocrine disruption
Solution Approach 2:
The patent changes the molecular weight and carbon distribution parameters of the alkylating agent by selecting normal olefins, isomerized olefins, or alpha-olefins with 10-30 carbon atoms. This parameter change shifts the alkyl phenol product distribution away from the harmful C10-15 range while maintaining adequate oil solubility through the presence of longer chain alkyl groups
Data Source
AI summary
The disclosed technology provides a lubricating composition comprising an oil of lubricating viscosity and 0.2 wt % to 10 wt % of a salt of a hydroxyl functional aromatic compound. The disclosed technology further relates to a method of lubricating a mechanical device with the lubricant composition.