Sunflower Protein Isolate Low-Temperature Alkaline Hydration
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Solution Overview
Problem
Current methods for producing sunflower seed protein isolates often require high temperatures, leading to protein denaturation and limiting the production of economically viable protein isolates with desirable physical properties for plant-based food applications.
Innovation Solution
A process involving low-temperature alkaline hydration of de-oiled sunflower seed flour, followed by protein precipitation and separation, to produce a sunflower seed protein isolate with high protein content (80-98 wt%) and unique functional attributes such as foaming, gelation, and emulsion capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high temperature processing is used to produce sunflower seed protein isolates, then production efficiency is improved, but protein denaturation occurs and functional properties deteriorate
Solution Approach 1:
The patent changes the temperature parameter from conventional high temperature processing to low temperature processing (maintaining below denaturation temperatures), and adjusts pH parameters through alkaline hydration followed by acid precipitation. This parameter change allows efficient protein isolation while preserving native protein structure and functional properties like foaming, gelation, and emulsion capabilities.
Solution Approach 2:
The patent applies preliminary alkaline hydration to the sunflower seed flour before extraction. This preliminary action modifies the protein structure and solubility characteristics, enabling efficient protein separation at low temperatures without denaturation, thus maintaining functional properties while achieving high productivity.
2Ease of manufacture
If conventional extraction methods are used, then production cost is reduced, but protein denaturation occurs and isolate quality deteriorates
Solution Approach 1:
The patent employs parameter changes by using low temperature processing combined with alkaline hydration and controlled pH precipitation. This approach maintains simple, economical processing steps while achieving high protein isolate quality with preserved functional properties, resolving the contradiction between ease of manufacture and manufacturing precision.
3Quantity of substance
If high protein content is achieved through conventional processing, then economic viability is improved, but protein denaturation occurs and native structure is lost
Solution Approach 1:
The patent achieves high protein content (80-98% on dry basis) by changing the processing parameters to low temperature alkaline hydration followed by controlled acid precipitation. This parameter change enables efficient protein separation and concentration while maintaining the native folded structure of sunflower proteins, preserving their functional properties.
Solution Approach 2:
The preliminary alkaline hydration step modifies protein solubility and structure, enabling high-protein isolation without denaturation. This preliminary action allows subsequent low-temperature precipitation to yield high-protein isolate with preserved native structure, simultaneously achieving quantity of substance and stability of composition.
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 effectively maintains the native form of proteins, achieving high protein content and desirable functional properties, making the sunflower seed protein isolate suitable for various plant-based food and beverage applications.
Implementation Method 1
alkaline hydration of the hull-free, desolvented, de-oiled sunflower seed flour with an aqueous solution at pH 7-11 and a temperature of 5-62° C.
Implementation Method 2
precipitating and separating the protein from the liquid fraction at pH 3-7.5 and a temperature of 5-62° C.
Implementation Method 3
the separation of solids to produce a liquid fraction is done by decantation and/or centrifugation
Data Source
AI summary
Provided herein are processes for producing a sunflower seed protein isolate (SFPI) from de-oiled sunflower seed flour that is economical and produces oil seed protein isolate that has unique composition and functionality. The process involves use of low temperatures, below where denaturation of proteins occurs, to produce a sunflower seed protein product with a protein content 80-98 wt % (N×6.25) on a dry basis and ≤3% oil while substantially maintaining the native form of the proteins in the flour.