Spiro Compound Detergents for Low-Ash Engine Lubricants
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Solution Overview
Problem
Existing lubricants for motorization systems face challenges in maintaining good detergent properties while reducing ash content, which is necessary to comply with environmental emission regulations and prevent damage to exhaust gas treatment systems.
Innovation Solution
Incorporating spiro compounds, particularly spiroboronates, as detergent additives in lubricating compositions to enhance detergent properties and reduce ash content, including sulfated ash, while improving oxidation stability and preventing abnormal combustion phenomena.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metallic detergents (sulfonates, phenates, salicylates of alkali metals) are used to maintain good detergent properties, then detergent capacity is improved, but ash content (sulfated ash) increases which damages exhaust gas treatment systems
Solution Approach 1:
The patent changes the chemical composition parameters by replacing metallic detergent additives with organic detergent compounds containing phosphorus and sulfur. This substitution maintains detergent functionality while fundamentally altering the chemical nature of the additive package to reduce ash-generating metal content, directly resolving the contradiction between detergent capacity and ash content
Solution Approach 2:
The patent employs organic detergent compounds that function as effective detergents during their service life but decompose completely without leaving persistent metallic residues. These organic detergents are designed to be consumed and degraded rather than accumulating as ash, replacing the long-lasting but ash-generating metallic detergents
2Object-affected harmful factors
If metallic detergents are reduced to lower ash content, then compliance with environmental regulations is improved, but detergent properties deteriorate leading to increased deposit formation
Solution Approach 1:
The patent creates a composite detergent system combining multiple organic compounds with specific functional groups (phosphorus-containing and sulfur-containing compounds). This composite approach provides synergistic effects where the combination of different organic molecules delivers superior detergent performance compared to individual compounds, while maintaining low ash content for regulatory compliance
Solution Approach 2:
The organic detergent compounds are designed to perform multiple functions simultaneously: they provide detergent action to prevent deposits, contribute to oxidation stability, and maintain compatibility with exhaust gas treatment systems. This multi-functionality allows reduction of metallic detergents without sacrificing overall lubricant performance
Data Source
AI summary
The present patent application relates to the use, as detergent additive in a lubricating composition intended for a motorization system, of a spiro compound of formula (I)in which M is an atom selected from boron and aluminum; R, independently of oneanother, represent a hydrocarbon group comprising from 1 to 50 carbon atoms; and n1 andn2, independently of one another, equal 0, 1 or 2.It also relates to a lubricating composition intended for the lubrication of a motorization system, comprising one or more base oils and at least one spiro compound of formula (I), and to a process for lubricating a motorization system using such a composition.