Magnesium Overbased Additive Hydrolytic Stability via Alkylphenol Resin
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Solution Overview
Problem
Magnesium overbased additives used in fuel oils to prevent corrosion and fouling are unstable in the presence of water and CO2 environments, leading to reduced effectiveness in inhibiting sulfidation and vanadic corrosion in gas turbines and diesel engines.
Innovation Solution
A method involving the reaction of an alkylphenol resin with alkyl amine and a mixture of alkenyl succinic anhydride and its acid to form a mixture of reaction products, which are then added to a magnesium overbased composition, enhancing its hydrolytic stability and asphaltene inhibition properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If magnesium overbased additives are used to prevent corrosion and fouling in fuel oils, then corrosion inhibition effectiveness is improved, but hydrolytic stability deteriorates in the presence of water and CO2
Solution Approach 1:
The patent introduces a stabilizer compound as an intermediary substance that mediates between the magnesium overbased additive and the harmful water/CO2 environment. This stabilizer forms a protective interaction with the magnesium additive, preventing direct hydrolysis and decomposition while maintaining the corrosion inhibition effectiveness. The stabilizer acts as a buffer that protects the active magnesium compounds from degradation in aqueous and carbonic environments.
2Object-affected harmful factors
If magnesium compounds are added to counteract vanadium and sulfur contaminants, then corrosion prevention is improved, but stability in water-containing environments deteriorates
Solution Approach 1:
The patent creates a composite additive system combining magnesium overbased compounds with specific stabilizer molecules. This composite structure integrates the corrosion-inhibiting properties of magnesium with the stabilizing properties of the organic compound, resulting in a synergistic formulation that maintains effectiveness in water-containing environments. The composite structure allows the magnesium to remain active for corrosion prevention while the stabilizer component prevents unwanted hydrolysis and decomposition.
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 resulting magnesium overbased composition demonstrates improved hydrolytic stability and effectiveness in preventing corrosion and fouling, maintaining performance even in the presence of water and CO2, and reducing asphaltene precipitation.
Implementation Method 1
reacting an alkylphenol resin in the presence of alkyl amine with a mixture of an alkenyl succinic anhydride and the acid form thereof to form a mixture of reaction products
Implementation Method 2
improving the hydrolytic stability of magnesium overbased compositions used in fuel oils
Data Source
AI summary
The hydrolytic stability of magnesium overbased products is significantly improved by the addition or inclusion of a mixture or reaction product of an alkylphenol resin with a mixture of an alkenyl succinic anhydride and the acid thereof, and an alkyl amine. These magnesium overbased products are useful additives to fuel oils to improve their corrosion-causing tendencies. In one non-limiting embodiment, the alkylphenol resin is nonylphenol resin and the succinic anhydride is a partially hydrolyzed succinic anhydride having from 14 to 26 carbon atoms, along with the acid thereof. The mixtures and reaction products also serve as asphaltene inhibitors in the fuel oils.