2-Phenyl Linear Alkylbenzene Sulfonate via Cross-Metathesis
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Solution Overview
Problem
Current methods for producing linear alkylbenzene sulfonates, particularly 2-phenyl linear alkylbenzene sulfonates, face challenges in achieving high selectivity and concentration of the 2-phenyl isomer, leading to suboptimal performance in hard water conditions and limited foaming ability, which affects cleaning efficiency.
Innovation Solution
The process involves cross metathesis of alpha-methyl styrene or 3-phenyl-1-butene with linear olefins, followed by hydrogenation and sulfonation to produce 2-phenyl linear alkylbenzene sulfonates with enhanced selectivity and concentration of the 2-phenyl isomer, improving solubility and foaming ability in hard water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce linear alkylbenzene sulfonates, then production cost is reduced, but selectivity and concentration of the 2-phenyl isomer deteriorate
Solution Approach 1:
The patent changes the chemical reaction parameters by using cross-metathesis instead of conventional alkylation, employing specific catalysts ( ruthenium-based or tungsten-based) and controlling reaction conditions (temperature, pressure, solvent) to achieve high selectivity for the 2-phenyl isomer while maintaining production efficiency
Solution Approach 2:
The patent introduces an intermediary cross-metathesis reaction step that converts alpha-methylstyrene and linear olefin into 2-phenyl linear alkene benzene, which is then hydrogenated to the final product. This intermediary approach enables precise control over isomer distribution without significantly complicating the overall manufacturing process
2Reliability
If conventional production methods are used, then manufacturing simplicity is maintained, but cleaning performance in hard water deteriorates
Solution Approach 1:
The patent achieves superior cleaning performance in hard water by changing the isomeric composition parameter to produce high concentrations of the 2-phenyl isomer (exceeding 85%), which has demonstrated enhanced effectiveness in hard water conditions compared to conventional mixed isomer products
Solution Approach 2:
The patent segments the alkylbenzene sulfonate product into distinct isomeric components through selective cross-metathesis, isolating the high-performance 2-phenyl isomer from other isomers. This segmentation allows the product to maintain manufacturing simplicity while achieving reliable cleaning performance in hard water
3Reliability
If conventional alkylation methods are used, then production cost is reduced, but foaming ability deteriorates
Solution Approach 1:
The patent improves foaming ability by changing the chemical composition parameter to produce high concentrations of the 2-phenyl isomer through cross-metathesis, which has superior foaming characteristics compared to conventional alkylation products. The process maintains manufacturing simplicity through efficient catalytic reactions and straightforward product isolation
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
This approach results in surfactants with increased 2-phenyl linear alkylbenzene sulfonate content, exceeding 85% purity, enhancing cleaning performance and solubility in cold-hard water conditions, thereby addressing the limitations of existing production methods.
Implementation Method 1
cross metathesis of alpha-methyl styrene (AMS) or 3-phenyl-1-butene (3Ph1C4) with a linear alpha olefin (AO) or a linear internal olefin (IO) to produce 2-phenyl linear alkene benzenes (2-PhLAeB)
Implementation Method 2
The 2-phenyl linear alkene benzenes (2-PhLAeB) are hydrogenated and sulfonated by well-known methodologies to yield 2-phenyl linear alkylbenzene sulfonates (2-PhLAS)
Implementation Method 3
The 2-phenyl linear alkene benzenes (2-PhLAeB) are hydrogenated and sulfonated by well-known methodologies to yield 2-phenyl linear alkylbenzene sulfonates (2-PhLAS)
Data Source
AI summary
The present invention relates to compositions comprising alkene benzenes or alkene benzene sulfonates or alkylbenzenes or alkylbenzene sulfonates; methods for making alkene benzenes or alkene benzene sulfonates or alkylbenzenes or alkylbenzene sulfonates; where the benzene ring is optionally substituted with one or more groups designated R*, where R* is defined herein. More particularly, the present invention relates to compositions comprising 2-phenyl linear alkene benzenes or 2-phenyl linear alkene benzene sulfonates or 2-phenyl linear alkylbenzenes or 2-phenyl linear alkylbenzene sulfonates; methods for making 2-phenyl alkene benzenes or 2-phenyl alkene benzene sulfonates or 2-phenyl alkylbenzenes or 2-phenyl alkylbenzene sulfonates; where the benzene ring is optionally substituted with one or more groups designated R*, where R* is defined herein. This invention also relates to compositions, methods of making, use of, and articles of manufacture comprising 2-ethoxylated hydroxymethylphenyl linear alkyl benzenes. This invention also relates to compositions, methods of making, use of, and articles of manufacture comprising 2-propoxylated hydroxymethylphenyl linear alkyl benzenes.