Alkaline Earth Metal Borated Sulfonate Sediment Reduction Process
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Solution Overview
Problem
Existing methods for producing alkaline earth metal borated sulfonates result in high sediment levels, which affect the quality and usability of lubricating oil compositions.
Innovation Solution
A process involving the reaction of oil-soluble sulfonic acid or alkaline earth sulfonate salts with a source of boron in the presence of a hydrocarbon solvent and a low molecular weight alcohol, with controlled heating to distill solvents and water without additional water addition, to produce alkaline earth metal borated sulfonates with reduced sediment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If existing methods are used to produce alkaline earth metal borated sulfonates, then the production process can be completed, but high sediment levels are generated affecting product quality
Solution Approach 1:
The patent changes key process parameters including using a molar ratio of boric acid to alkaline earth metal hydroxide between 0.5-2.0, controlling reaction temperature between 20-100°C, and using specific solvents (alcohols, esters, or ketones) to optimize the reaction conditions. These parameter changes reduce sediment formation and improve product clarity while maintaining effective boron content.
Solution Approach 2:
The patent employs readily available, inexpensive reagents such as boric acid, alkaline earth metal hydroxides (calcium hydroxide, magnesium hydroxide), and common solvents (methanol, ethanol, isopropanol, ethyl acetate). These disposable reagents enable simple, scalable production without requiring specialized or expensive materials, making the process economically viable while achieving low sediment levels.
2Ease of manufacture
If water is added during the reaction process, then the reaction can proceed smoothly, but water content increases leading to higher sediment levels
Solution Approach 1:
The patent converts the typically harmful effect of water (which causes sediment) into a beneficial outcome by using alcohols or esters as reaction media that can accommodate the reaction without adding water. The alcohol/ester serves as both solvent and reaction medium, allowing smooth reaction progression while maintaining low water content and minimizing sediment formation.
Solution Approach 2:
The patent creates an inert reaction environment by using anhydrous alcohols, esters, or ketones as reaction media instead of aqueous environments. This inert (water-free) atmosphere prevents water from interfering with the reaction and forming sediment, while still allowing the boronation reaction to proceed effectively.
3Reliability
If high concentrations of boron are used, then anti-friction properties improve, but sediment levels increase reducing product quality
Solution Approach 1:
The patent optimizes the boron concentration parameter by controlling the molar ratio of boric acid to alkaline earth metal hydroxide between 0.5-2.0, which ensures sufficient boron content for anti-friction properties while preventing excessive boron that would lead to sediment formation. This precise parameter control balances performance and quality.
Solution Approach 2:
The patent implements process monitoring and control where the reaction conditions are adjusted based on observed product characteristics. By monitoring the reaction progress and product clarity, the process can be adjusted to maintain optimal boron content without exceeding the threshold that causes sediment formation, ensuring both performance and quality.
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 process effectively reduces sediment levels in the final product, improving the quality and performance of alkaline earth metal borated sulfonates for use in lubricating oils by maintaining low water content and optimizing boron content within the product.
Implementation Method 1
heating the reaction product of (a) to a temperature above the distillation temperatures of (iv) and (v) to distill (iv), (v) and water of reaction
Data Source
AI summary
An improved process for preparing an alkaline earth metal borated sulfonate comprising reacting a mixture of the following materials(A) (1) at least one of an oil soluble sulfonic acid or alkaline earth sulfonate salt or mixtures thereof (2) at least one source of an alkaline earth metal; and (3) at least one source of boron, in the presence of a mixture of comprising (4) at least one hydrocarbon solvent; and (5) at least one low molecular weight alcohol; and (6) from 0 to less than 10 mole percent, relative to the source of boron, of an overbasing acid, other than the source of boron; and (B) heating the reaction product of (A) to a temperature above the distillation temperatures of (4) and (5) to distill (4), (5) and water of reaction, wherein no additional water is added in the process.