Oxygen Absorbing Composition Using Ascorbic Acid and Transition Metal Salt
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Solution Overview
Problem
Existing oxygen-absorbing and carbon dioxide-emitting compositions, such as those containing alkaline salts of organic acids, exhibit slower oxygen absorption and carbon dioxide emission due to high pH values, which affects their performance and efficiency in various applications.
Innovation Solution
A composition that includes ascorbic acid, an organic acid, a catalyst promoting oxidation, and a soluble transition metal salt with multiple oxidation states, adjusted to specific pH levels to enhance oxygen absorption and carbon dioxide emission rates, allowing for customizable performance based on intended use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If alkaline salts of organic acids are used in the composition, then the composition maintains stability, but the oxygen absorption and carbon dioxide emission rates decrease
Solution Approach 1:
The patent changes the pH parameter from alkaline (pH > 7) to acidic (pH 2-6) by replacing alkaline salts with organic acids and their salts. This parameter change fundamentally alters the reaction mechanism, enabling faster oxygen absorption and carbon dioxide emission rates while maintaining composition stability through the use of buffered acidic systems.
2Stability of the object's composition
If high pH values are used in the composition, then the composition remains stable, but the carbon dioxide emission rate slows down
Solution Approach 1:
The patent inverts the pH parameter from high (alkaline) to low (acidic). By using organic acids like ascorbic acid, citric acid, or malic acid at pH 2-6, the composition achieves rapid carbon dioxide emission through acid-base reactions with carbonates or bicarbonates, while stability is maintained through the buffered nature of these acidic systems.
3Reliability
If traditional ascorbic acid compositions are used, then the composition is effective for oxygen absorption, but the efficiency is limited compared to optimized compositions
Solution Approach 1:
The patent creates a composite system combining organic acids (ascorbic acid, citric acid, malic acid), their salts, carbonates, or bicarbonates in specific ratios at controlled pH 2-6. This composite formulation synergistically enhances both the reliability and productivity of oxygen absorption, achieving up to 10 times greater efficiency than traditional single-component ascorbic acid compositions while maintaining effectiveness.
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 composition achieves faster and more efficient oxygen absorption and carbon dioxide emission, with adjustable rates and extent, optimizing performance across different applications by maintaining a pH range of 3 to 9.5, particularly effective between 4 to 6, and up to 10 times more efficient than traditional ascorbic acid compositions.
Implementation Method 1
ascorbic acid, organic acid, a catalyst that promotes oxidation of the organic acid
Implementation Method 2
a catalyst that promotes oxidation of the organic acid and emission of carbon dioxide
Implementation Method 3
an inorganic carbon dioxide source, e.g., carbonate or bicarbonate of alkali or alkaline earth metals acting via formation of carbonic acid by acid-base proton exchange reactions
Implementation Method 4
a soluble transition metal salt with multiple oxidation states, adjusted to specific pH levels to enhance oxygen absorption and carbon dioxide emission rates
Data Source
AI summary
A composition that absorbs oxygen and emits carbon dioxide in response to absorbing oxygen including ascorbic acid, an organic acid, a catalyst that promotes oxidation of the organic acid and emission of carbon dioxide and a soluble transition metal salt characterized by multiple oxidation states.