Vegetable Oil Deodorization with Acid-Activated Bleaching Earth
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Solution Overview
Problem
Current methods for refining vegetable oils to remove glycidyl esters are not practically useful on an industrial scale, as they often result in products with high levels of free fatty acids, unpleasant odors, and stability issues due to short deodorization times and high temperatures.
Innovation Solution
A method involving contacting vegetable oils with at least 0.5% by weight of acid-activated bleaching earth, followed by deodorization at a temperature of less than 200°C for at least 30 minutes, effectively reducing glycidyl ester content to less than 10% of the initial level, while maintaining stability and taste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If short deodorization time at high temperature is used to remove glycidyl esters, then glycidyl ester removal efficiency is improved, but product quality deteriorates (high free fatty acids, unpleasant odors, stability issues)
Solution Approach 1:
The invention changes the deodorization parameters from high temperature/short time to low temperature (less than 200°C)/long time (at least 30 minutes), fundamentally altering the process conditions to achieve both efficient contaminant removal and product quality preservation
Solution Approach 2:
The invention introduces acid-activated bleaching earth as an intermediary substance that adsorbs glycidyl esters and other contaminants from the oil before deodorization, making the subsequent deodorization step more effective at lower temperatures and longer durations
2Productivity
If conventional refining methods are used, then processing speed is improved, but harmful contaminants (glycidyl esters, 3-MCPD esters) remain in the product
Solution Approach 1:
Acid-activated bleaching earth serves as an intermediary adsorbent that selectively binds to harmful contaminants (glycidyl esters, 3-MCPD esters, free fatty acids) during the refining process, removing them from the oil while preserving the quality of the triglyceride fraction
Solution Approach 2:
The invention uses acid-activated bleaching earth, which is a composite material combining clay minerals with acid treatment, creating a material with enhanced adsorption capacity for removing multiple types of contaminants simultaneously
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 method produces a refined vegetable oil with low glycidyl ester levels, improved stability, and better taste, suitable for industrial-scale production, with reduced free fatty acids and peroxides, ensuring better storage stability.
Implementation Method 1
contacting the oil with at least 0.5% by weight of the oil of an acid-activated bleaching earth
Implementation Method 2
deodorising the oil at a temperature of less than 200° C. for a time of at least 30 minutes
Data Source
AI summary
A method of removing glycidyl esters from a vegetable oil comprises contacting the oil with at least 0.5% by weight of the oil of an acid-activated bleaching earth and deodorizing the oil at a temperature of less than 200° C. for a time of at least 30 minutes.