PUFA Alkyl Ester Composition With Low 3-MCPD Formation
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Solution Overview
Problem
Existing methods fail to effectively reduce the concentration of 3-MCPD fatty acid esters in highly enriched alkyl esters of polyunsaturated fatty acids (PUFAs), which are used in food products, supplements, and cosmetics, due to the formation of 3-MCPD during refining processes like distillation and chromatography, despite the known carcinogenicity of 3-MCPD and regulatory concerns.
Innovation Solution
The concentration of trace metals, particularly iron, is adjusted to less than 0.20 ppm in the starting material, and the content of monoacylglycerol (MAG) with C14 or C16 fatty acids is reduced, ensuring that the formation of 3-MCPD fatty acid esters is minimized during distillation, thereby producing PUFA or PUFA alkyl esters with low 3-MCPD concentrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If distillation and chromatography are used to enrich PUFAs, then the proportion of desired PUFA increases, but 3-MCPD fatty acid esters form during the process
Solution Approach 1:
The patent applies preliminary action by removing MAG and DAG substrates and controlling trace metal content before the distillation process begins. This prevents the formation of 3-MCPD fatty acid esters during subsequent heating by eliminating the necessary components (MAG/DAG substrates and metal catalysts) required for the harmful reaction to occur.
Solution Approach 2:
The patent employs parameter changes by strictly controlling the concentration of trace metals (particularly iron) to less than 0.20 ppm and limiting MAG/DAG content. These parameter changes prevent the catalytic formation of 3-MCPD while allowing the distillation process to proceed for PUFA enrichment.
2Object-generated harmful factors
If complete removal of MAG and DAG is performed to prevent 3-MCPD formation, then 3-MCPD concentrations decrease, but productivity and PUFA recovery are negatively affected
Solution Approach 1:
The patent applies parameter changes by establishing specific threshold values for MAG/DAG content and trace metal concentrations that balance 3-MCPD prevention with productivity maintenance. Rather than complete removal, the patent controls these parameters within ranges that prevent harmful formation while preserving necessary substrates for PUFA production.
3Manufacturing precision
If rectification is used to achieve high separation performance, then PUFA enrichment improves, but heating temperatures exceed 150°C which promotes 3-MCPD formation
Solution Approach 1:
The patent applies preliminary action by controlling trace metal content and MAG/DAG levels before distillation, which prevents 3-MCPD formation even when higher temperatures are used during rectification for improved separation performance.
Solution Approach 2:
The patent employs parameter changes by controlling trace metal concentrations to less than 0.20 ppm, which allows the system to tolerate higher heating temperatures during rectification without promoting 3-MCPD formation, thus achieving both good separation and low 3-MCPD levels.
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
Compositions with high PUFA content and low 3-MCPD concentrations are produced consistently, meeting regulatory standards and ensuring safety for use in food, supplements, and cosmetics.
Implementation Method 1
distilling the composition obtained after step (2) and collecting a main distillate fraction
Implementation Method 2
refining steps such as solvent removal and distillation that include a heating procedure
Data Source
AI summary
The disclosure aims to provide compositions comprising highly enriched PUFA or alkyl ester thereof while containing fatty acid esters of 3-MCPD at adequately low concentrations and to provide an efficient method for producing the composition. The proposed composition contains fatty acids or fatty acid alkyl esters as its major component, the composition containing highly unsaturated fatty acid or alkyl ester thereof, wherein the proportion of the highly unsaturated fatty acid in the constituent fatty acids of the composition is 50 area% or more and wherein the concentration of 3-MCPD, as found by analysing the composition using American Oil Chemists' Society official method Cd 29b-13 assay A, is less than 1.80 ppm.