Methanesulfonic Acid Purification for Biodiesel Phosphorus Removal
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Solution Overview
Problem
Current methods for purifying vegetable and animal oils for biodiesel production are inadequate in reducing phosphorus, calcium, and magnesium content to meet stringent industrial standards, particularly when using heterogeneous catalysts, and often require additives not approved for food treatment.
Innovation Solution
The use of methanesulfonic acid (MSA) to purify organic liquids, such as triglyceride-containing compositions and biodiesel, effectively removes phospholipids and metal ions, achieving significantly lower residual levels of calcium and magnesium, even below current EU standards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional purification methods (water degumming, citric acid treatment) are used, then phospholipids are removed to some extent, but phosphorus, calcium, and magnesium content remains above stringent industrial standards (4 ppm P, 5 ppm Ca/Mg)
Solution Approach 1:
The patent employs methanesulfonic acid (MSA) with specific physical and chemical parameters (acid strength, solubility, selectivity) that differ from conventional acids like citric acid. MSA's stronger acidity and specific molecular structure enable more effective removal of phosphorus, calcium, and magnesium compounds, achieving phosphorus content below 4 ppm and calcium/magnesium below 5 ppm, thus resolving the contradiction between manufacturing precision and catalyst reliability.
Solution Approach 2:
Methanesulfonic acid acts as an intermediary substance that facilitates the removal of harmful phosphorus-containing compounds and metal ions. The acid forms soluble complexes with phospholipids and metal ions, enabling their separation from the oil phase. This intermediary mechanism achieves the required purification levels without directly affecting the heterogeneous catalyst performance.
2Manufacturing precision
If stronger acids are used to reduce phosphorus content further, then phosphorus removal efficiency improves, but food safety and regulatory compliance deteriorate
Solution Approach 1:
Methanesulfonic acid is used in controlled amounts during the purification process and is subsequently removed or neutralized. The acid serves its purpose of achieving low phosphorus content (below 4 ppm) and then is discarded or treated, similar to disposable short-living objects. This approach allows aggressive phosphorus removal without long-term food safety concerns, as the acid does not remain in the final product.
Solution Approach 2:
The patent utilizes specific parameters of methanesulfonic acid (concentration, contact time, temperature) to achieve effective phosphorus removal while controlling the acid's impact on food safety. By optimizing these parameters, the process achieves phosphorus content below 4 ppm while the acid's harmful effects are minimized through controlled application and subsequent removal.
3Manufacturing precision
If multiple purification steps are used to achieve low phosphorus content, then phosphorus removal effectiveness improves, but process complexity and production time increase
Solution Approach 1:
The patent combines phosphorus removal, calcium removal, and magnesium removal into a single purification step using methanesulfonic acid. This merged process simultaneously achieves phosphorus content below 4 ppm and calcium/magnesium below 5 ppm, eliminating the need for separate treatment steps and reducing overall production time while maintaining high manufacturing precision.
Solution Approach 2:
Methanesulfonic acid serves multiple functions in a single step: it acts as a phosphorus remover, calcium remover, and magnesium remover. This multi-functional approach achieves comprehensive purification (phosphorus < 4 ppm, calcium < 5 ppm, magnesium < 5 ppm) without requiring multiple sequential processes, thus improving productivity while maintaining manufacturing precision.
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
MSA treatment achieves substantial reductions in phosphorus, calcium, and magnesium content, making the process suitable for industrial-scale biodiesel production while avoiding the need for food-treatment-approved additives.
Implementation Method 1
MSA is mentioned as a possible acid... bringing an organic liquid into contact with methanesulfonic acid... effectively removes phospholipids and metal ions
Implementation Method 2
MSA treatment achieves substantial reductions in phosphorus, calcium, and magnesium content... removes phospholipids and metal ions
Data Source
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AI summary
The present invention relates to a method for purifying organic liquids having a solid or liquid formulation.