Alkane-Sulphonic and Sulphuric Acid Catalyst Composition
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Solution Overview
Problem
Current fatty acid esterification methods using alkane-sulphonic acids and sulphuric acid as catalysts face challenges with high costs and secondary reactions that reduce the efficacy of esterification, necessitating a more effective and cost-efficient catalyst composition.
Innovation Solution
A composition comprising a mixture of alkane-sulphonic acid and sulphuric acid in specific weight proportions, optionally with a solvent, is used as a catalyst in fatty acid esterification, optimizing the conversion of fatty acids to esters and improving kinetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If sulphuric acid is used as catalyst, then esterification reaction can proceed, but oxidising and dehydrating secondary reactions occur that reduce efficacy
Solution Approach 1:
The patent combines two acid catalysts (alkane-sulphonic acid and sulphuric acid) in specific proportions to create a synergistic catalytic system. The alkane-sulphonic acid (40-90 wt%) provides strong catalytic activity for esterification, while sulphuric acid (10-60 wt%) enhances the reaction rate. This combination achieves high productivity while minimizing harmful secondary reactions that occur with either catalyst alone.
2Productivity
If alkane-sulphonic acid is used as catalyst, then esterification efficacy is improved, but cost increases due to expensive compound
Solution Approach 1:
The patent optimizes the composition parameters of the catalytic system by establishing specific weight ratio ranges (alkane-sulphonic acid: 40-90 wt%, sulphuric acid: 10-60 wt%). This parameter optimization allows the use of expensive alkane-sulphonic acid at reduced concentrations while maintaining high esterification efficacy through synergistic catalysis, thereby reducing overall catalyst cost.
Solution Approach 2:
The patent replaces a portion of the expensive alkane-sulphonic acid catalyst with cheaper sulphuric acid catalyst. While sulphuric acid is less effective alone, in the combined system it provides sufficient catalytic activity at lower cost, reducing the amount of expensive alkane-sulphonic acid needed while maintaining overall esterification efficacy.
3Manufacturing precision
If higher proportion of alkane-sulphonic acid is used, then conversion degree increases, but catalyst cost increases
Solution Approach 1:
The patent establishes optimal parameter ranges for catalyst composition (alkane-sulphonic acid: 40-90 wt%, sulphuric acid: 10-60 wt%) that achieve high conversion degrees (reducing residual fatty acids to <1%) while optimizing catalyst cost. The synergistic interaction between the two acids allows effective catalysis at these optimized proportions.
Solution Approach 2:
The patent creates a composite catalytic system combining alkane-sulphonic acid and sulphuric acid in specific proportions. This composite catalyst leverages the strengths of both components: alkane-sulphonic acid provides high catalytic activity and selectivity, while sulphuric acid enhances reaction rate and provides cost benefits, achieving high conversion at optimized cost.
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 composition effectively reduces residual fatty acid content to less than 1% in the organic phase, enhancing the purity of esters and reducing catalyst consumption in subsequent transesterification steps, while improving conversion kinetics compared to using either acid alone.
Implementation Method 1
a catalyst comprising at least one particular acidic composition enables, among other things, these drawbacks to be overcome. Thus, and according to a first aspect, the present invention relates to a composition comprising: at least one alkane-sulphonic acid of formula R—SO3H wherein R represents a saturated, linear or branched, hydrocarbon chain comprising from 1 to 4 carbon atoms, which can or cannot be substituted by at least one halogen atom; sulphuric acid
Data Source
AI summary
The invention relates to a composition comprising:at least one alkane-sulphonic acid R—SO3H wherein R represents a saturated, linear or branched, hydrocarbon chain comprising from 1 to 4 carbon atoms, which can or cannot be substituted by at least one halogen atom;sulphuric acid;and optionally at least one solvent;of which the proportions are defined in the description.The invention also relates to the use of the composition as a fatty acid esterification catalyst.