Ethanol-Based Omega-3 Concentration Process
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Solution Overview
Problem
Current methods for producing ω-3 fatty acid concentrates with over 80% content are inefficient, often relying on urea fractionation which results in low recovery yields, environmental concerns, and the production of carcinogens, while alternative processes either fall short of achieving high concentrations or use restricted organic solvents.
Innovation Solution
A process involving saponification with ethanol and an alkali metal hydroxide, followed by cooling, acidification, esterification, and distillation to obtain ethyl esters of ω-3 fatty acids with a concentration of at least 80%, without using urea or restricted organic solvents, ensuring high recovery yields and maintaining the natural all cis configuration of double bonds.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If urea fractionation is used to produce ω-3 fatty acid concentrates, then the concentration can be increased, but the recovery yield decreases and harmful factors are generated
Solution Approach 1:
The invention extracts and removes urea from the fractionation process entirely, replacing it with a multi-stage process using ethanol, water, and distillation techniques. This extraction of the harmful substance (urea) eliminates the generation of carcinogenic byproducts while maintaining the ability to concentrate ω-3 fatty acids to the desired levels.
Solution Approach 2:
The invention changes the parameters of the fractionation process by using ethanol-water mixtures at controlled temperatures and pressures, followed by distillation. This parameter change from urea-based to ethanol-based fractionation achieves high concentration without the harmful effects of urea adduct formation and subsequent carcinogen production.
2Ease of manufacture
If traditional refining processes are used, then the process is simple and cost-effective, but the ω-3 fatty acid concentration remains below 60%
Solution Approach 1:
The invention segments the concentration process into multiple distinct stages: initial ethanol fractionation to remove saturated fats, water addition and heating to separate intermediate components, and final distillation to achieve high concentration. This segmentation allows each stage to target specific components, progressively concentrating ω-3 fatty acids while maintaining process feasibility.
Solution Approach 2:
The invention uses a composite approach combining ethanol, water, and controlled temperature/pressure conditions in a multi-stage process. This composite methodology integrates different fractionation techniques to achieve concentration levels (>80%) that neither simple refining nor single-stage fractionation can accomplish alone.
3Manufacturing precision
If multiple fractionation techniques are combined to achieve high concentration, then the ω-3 fatty acid content increases, but the device complexity increases
Solution Approach 1:
The invention merges fractionation and concentration steps into an integrated multi-stage process using the same equipment system. Ethanol fractionation, water addition, heating, and distillation are combined in a unified process flow that achieves high concentration without requiring separate complex equipment for each stage, thereby reducing overall device complexity 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
This process achieves high recovery yields of ω-3 fatty acids with concentrations exceeding 80% while preserving the natural configuration, avoiding the generation of undesirable isomers or side products, and adhering to environmental safety standards.
Implementation Method 1
contacting the composition of matter with ethanol having a water content of 4% or less and an alkali metal hydroxide at a temperature between 60°C and 200°C to form a liquid mixture comprising alkali metal salts of fatty acids
Implementation Method 2
cooling the liquid mixture to a temperature between 50 and -20°C to form a solid and a liquid phase, and separating the liquid phase comprising ω-3 fatty acids from the solid phase
Implementation Method 3
contacting the liquid phase of step b) with an acid to form an acidified mixture comprising less than 10% in weight of water, ω-3 fatty acids and salts of the alkali metal and the acid
Implementation Method 4
heating the acidified mixture free of salts of the alkali metal with an esterification catalyst at a temperature between 50°C and 150°C to form a mixture comprising ethyl esters of ω-3 fatty acids
Implementation Method 5
distilling the neutralized mixture to obtain a distillate comprising at least 80% of ethyl esters of ω-3 fatty acids
Data Source
AI summary
An efficient and simple process to obtain a concentrate that comprising over 80% in weight of ethyl esters of ω-3 fatty acids based on a composition of matter that contains esters of ω-3 fatty acids or free ω-3 fatty acids that comprises the steps of: a) contacting the composition of matter with ethanol of at least 96% in weight and a hydroxide of an alkali metal at a temperature between 60 and 200 °C to form a liquid mixture comprising alkaline salts of fatty acids; b) cooling the liquid mixture to a temperature between soft and -20 °C to form a solid phase and a liquid phase and separate the liquid phase from the solid phase; c) contacting the separated liquid phase of step b) with an acid to form an acidified mixture with a water content under 10%, where the mixture consists of a solid phase that includes the alkali metal salt of the acid and a liquid phase comprising ω-3 fatty acids; d) heating the mixture of step c) between 50 to 150 °C in the presence of an esterification catalyst to form a mixture comprising ethyl esters of ω-3 fatty acids; e) contacting the mixture of stage d) with an alkali to form a neutralized mixture; f) distilling the neutralized mixture to obtain a distillate that includes over 80% in weight of ethyl esters of ω-3 fatty acids.