Soy Protein Processing with Reducing Agent and Alcohol
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Solution Overview
Problem
Existing soy protein processing techniques fail to enhance solubility and color characteristics while minimizing antigenicity and off-flavors, often resulting in products with low water solubility and undesirable colors.
Innovation Solution
A method involving blending vegetable protein with alcohol and a reducing agent, followed by heating to create a proteinaceous product with improved solubility, color, and reduced antigenicity, using a process that includes mixing, heating, and drying to form a product with increased Protein Dispersability Index (PDI) and lighter color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If organic solvent-based processing techniques are used to reduce off-flavors, then off-flavors are minimized, but protein solubility decreases and discoloration occurs
Solution Approach 1:
The patent changes the chemical parameters of the processing system by using aqueous alkali metal hydroxide solutions (pH 7-14) instead of organic solvents, and by controlling temperature (20-100°C) and treatment time (1 minute to 24 hours) to achieve flavor improvement without protein denaturation. This resolves the contradiction by finding parameter ranges that improve off-flavors while maintaining protein solubility.
Solution Approach 2:
The patent employs strong base (alkali metal hydroxide) to accelerate chemical reactions that degrade off-flavor compounds through saponification and hydrolysis. The strong base environment promotes rapid breakdown of triglycerides and other off-flavor precursors without requiring organic solvents or high-heat treatment that would denature proteins.
2Object-generated harmful factors
If heat treatment is applied to reduce off-flavors, then off-flavors are minimized, but antigenicity is not reduced and protein solubility decreases
Solution Approach 1:
The patent changes the fundamental processing parameter from thermal treatment to chemical treatment using aqueous alkali metal hydroxide. By operating at moderate temperatures (20-100°C) with base treatment, the process achieves off-flavor reduction through chemical degradation rather than thermal denaturation, thereby maintaining protein solubility while still minimizing off-flavors.
Solution Approach 2:
The patent substitutes thermal/mechanical processing (heat treatment) with chemical processing (base treatment). Instead of using heat to modify protein structure and reduce off-flavors, the process uses chemical reactions in aqueous base to degrade off-flavor compounds while preserving protein integrity and solubility.
3Reliability
If extensive processing is used to improve solubility, then protein dispersability increases, but more processing steps are required
Solution Approach 1:
The aqueous alkali metal hydroxide treatment serves multiple functions simultaneously: it degrades off-flavor compounds, improves protein solubility, and can be applied to various soybean products (flour, meal, protein concentrate). This multi-functionality reduces the need for separate processing steps for flavor improvement and solubility enhancement.
Solution Approach 2:
The patent combines flavor improvement and solubility enhancement into a single integrated processing step. By using aqueous base treatment, both off-flavor degradation and protein solubility improvement occur concurrently in the same reactor under the same conditions, eliminating the need for sequential processing steps.
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 significantly enhances the solubility and whiteness of soy protein products, reduces antigenic activity, and maintains palatability, achieving higher PDI and L* values compared to traditional methods.
Implementation Method 1
blending the proteinaceous material with alcohol and a reducing agent
Implementation Method 2
maintaining a combination comprising the proteinaceous material and the reducing agent at a greater than ambient temperature for a holding period of at least about five minutes
Data Source
AI summary
A method of processing a proteinaceous material, the method entails (1) blending the proteinaceous material with alcohol and a reducing agent and (2) maintaining a combination having the proteinaceous material and the reducing agent at a greater than ambient temperature for a holding period of at least about five minutes to form a proteinaceous product.