Continuous Vitamin E Separation from Fatty Mixtures
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Solution Overview
Problem
Current methods for separating unsaponifiable components like vitamin E, sterols, and terpenes from fatty mixtures are energy-intensive and result in low yields, with significant degradation of these valuable compounds due to the complexity and harsh conditions required in existing processes.
Innovation Solution
A continuous process involving a single-stage acid-catalyzed reaction in a reactor under high temperatures and pressures, using a monohydric alcohol and acidic catalyst, which allows for efficient separation of vitamin E, sterols, and terpenes without significant decomposition, maintaining their chemical structure and achieving high yields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If conventional multi-step separation methods are used to obtain unsaponifiable components, then separation can be achieved, but energy consumption is high and yields are low with significant degradation
Solution Approach 1:
The process segments the separation into two distinct phases: first, esterification/transesterification of saponifiable components (fatty acids and triglycerides) to form fatty acid esters; second, separation of the non-polar phase containing unsaponifiable components from the polar phase. This segmentation allows selective transformation of interfering substances without directly exposing valuable compounds to harsh separation conditions.
Solution Approach 2:
The invention changes the chemical parameters of saponifiable components through acid-catalyzed esterification and base-catalyzed transesterification, transforming fatty acids and triglycerides into fatty acid esters with different solubility properties. This parameter change enables phase separation based on polarity differences, allowing gentle isolation of unsaponifiable components without high energy input or degradation.
2Productivity
If harsh conditions are applied in existing separation processes, then separation efficiency may improve, but degradation of valuable compounds occurs
Solution Approach 1:
The invention introduces an intermediary chemical transformation step where saponifiable components are converted into fatty acid esters through esterification and transesterification. These esters act as intermediaries that facilitate phase separation without requiring harsh conditions on the valuable unsaponifiable components themselves, thus maintaining their stability while achieving efficient separation.
Solution Approach 2:
The invention replaces direct mechanical/physical separation methods (which would require harsh conditions) with a chemical transformation approach. By converting saponifiable substances into esters that naturally separate into different phases, the process achieves high productivity through chemical affinity differences rather than forceful mechanical separation, thereby preserving compound stability.
3Loss of substance
If complex multi-step processes are used, then complete separation can be achieved, but process complexity increases
Solution Approach 1:
The invention merges the esterification of free fatty acids and the transesterification of triglycerides into a single integrated reaction step using acid catalyst, followed by a unified base-catalyzed transesterification step. This consolidation reduces the number of separate unit operations compared to conventional methods, simplifying the overall process while maintaining complete recovery of unsaponifiable components through the subsequent phase separation.
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 process achieves high concentrations of vitamin E, sterols, and terpenes with minimal loss, providing a free, non-esterified form of these compounds, with yields exceeding 90% and maintaining their stability, unlike previous methods which suffered from degradation and low yields.
Implementation Method 1
a) Providing a reaction mixture containing an oily or fatty mixture of biological origin, at least one monohydric alcohol, preferably methanol and/or ethanol, and at least one acidic catalyst; b) continuous passage of the reaction mixture through a reactor... in which the reaction mixture undergoes a temperature increase... so that the reaction mixture is in a liquid, critical or supercritical state
Implementation Method 2
Process step b) continues with the transesterification of the triglycerides and/or phospholipids with the monohydric alcohol under the same reaction conditions, whereby fatty acid esters and glycerol are formed
Implementation Method 3
b) continuous passage of the reaction mixture through a reactor, in particular a tubular reactor, which has a heating zone in which the reaction mixture undergoes a temperature increase
Implementation Method 4
and in which the reaction mixture is under a pressure between 2 and 250 bar, so that the reaction mixture is in a liquid, critical or supercritical state
Implementation Method 5
d) Separating the product mixture from process step c) into a polar phase containing the glycerol formed during the transesterification, the unreacted monohydric alcohol, the acidic catalyst, and the water of reaction formed during the esterification of the oily or fatty mixture, and into a nonpolar phase containing the fatty acid esters formed by esterification and transesterification and secondary constituents dissolved and/or dispersed therein
Implementation Method 6
e) Separating the fatty acid esters formed by esterification and transesterification from the nonpolar phase of process step d) to produce a residue containing vitamin E, sterols, and/or terpenes
Data Source
AI summary
A continuous method is described for concentrating or separating vitamin E, sterols and/or terpenes from oily or fatty mixtures of biological origin with the measures: a) providing a reaction mixture containing an oily and/or fatty mixture of biological origin, at least one monovalent alcohol and at least one acid catalyst, b) continuous passing of the reaction mixture through a reactor, which comprises a heating zone in which the reaction mixture is heated to a temperature of between 100 °C and 190 °C, measured immediately after leaving the heating zone by means of a temperature sensor, and in which the reaction mixture is under such a pressure that the reaction mixture is present in a liquid, critical or supercritical state, c) adjustment of a flow speed of the reaction mixture such that its dwell time in the heating zone is up to 10 minutes, d) separation of the product mixture of method step c) into a polar phase containing the glycerine that was formed during transesterification, the non-converted monovalent alcohol, the acid catalyst, the reaction water that was formed during esterification of the oily or fatty mixture, and into a non-polar phase containing the fatty acid esters that were formed during esterification and transesterification and the secondary ingredients dissolved and/or dispersed therein, and e) separation of the fatty acid esters that were formed during esterification and transesterification out of the non-polar phase from process step d) under formation of a residue containing vitamin E, sterols and/or terpenes. The treatment of the oily or fatty mixtures is very gentle so that the vitamin E, sterol and/or terpene ingredients contained therein are only negligibly damaged and remain in high concentration in the residue.