PO-EO-PO Primary Alcohol Surfactants for Fermentation Foam Control
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Solution Overview
Problem
Existing foam control agents for fermentation processes are ineffective in simultaneously functioning as both antifoaming and defoaming agents, particularly those based on primary alcohol surfactants with specific PO-EO-PO triblock structures, due to unpredictable properties and differing operational environments.
Innovation Solution
A primary alcohol surfactant with a PO-EO-PO triblock structure having a terminal PO to EO ratio from 1.00 to 2.00, characterized by specific m, n, and o values, functions as both an antifoaming and defoaming agent by reducing foam accumulation and dissipating formed foam.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antifoaming agents are used, then foam formation is prevented, but foam breakdown capability is insufficient
Solution Approach 1:
The patent applies multi-functionality by designing a single surfactant molecule with a PO-EO-PO triblock structure that simultaneously provides antifoaming and defoaming capabilities. The specific molecular architecture allows the same agent to prevent foam formation during fermentation while also being able to break down existing foam, eliminating the need for separate agents for each function.
Solution Approach 2:
The patent utilizes parameter changes by carefully controlling the ratio of propylene oxide (PO) to ethylene oxide (EO) units in the triblock structure, specifically setting the terminal PO to EO ratio from 1.00 to 2.00. This parameter optimization enables the surfactant to achieve both antifoaming and defoaming functions by adjusting the hydrophobicity and interfacial activity characteristics of the molecule.
2Adaptability or versatility
If secondary alcohol ethoxylates are used as foam control agents, then both antifoaming and defoaming functions are achieved, but production cost increases
Solution Approach 1:
The patent applies this principle by replacing expensive secondary alcohol ethoxylates with a foam control agent based on primary alcohol surfactants having a PO-EO-PO triblock structure. The primary alcohol-based approach achieves comparable or superior dual functionality at lower production cost, making the solution more economically viable for industrial fermentation processes.
Solution Approach 2:
The patent uses parameter changes by optimizing the PO to EO ratio in the triblock structure to fall within 1.00 to 2.00, which enables primary alcohol-based surfactants to achieve the same effectiveness as secondary alcohol ethoxylates while being more cost-effective to manufacture.
3Ease of manufacture
If primary alcohol surfactants with PO-EO-PO triblock structure are used, then cost is reduced, but foam control effectiveness is unpredictable
Solution Approach 1:
The patent applies parameter changes by establishing specific structural parameters for the PO-EO-PO triblock surfactant, particularly setting the terminal PO to EO ratio between 1.00 and 2.00, along with defining the molecular weight ranges (m: 1-10, n: 9-15, o: 15-25). These parameter specifications transform the previously unpredictable performance into reliable and reproducible foam control effectiveness.
Solution Approach 2:
The patent applies local quality by focusing on the specific structural characteristics of the triblock surfactant, particularly the terminal PO groups and the central EO block. By optimizing the local chemical structure and properties of different segments of the molecule, the patent achieves predictable and reliable foam control performance.
4Reliability
If foam control agents are added to broth, then foam accumulation is reduced, but existing foam is not effectively broken down
Solution Approach 1:
The patent applies multi-functionality by designing a single surfactant molecule that performs both foam prevention and foam breakdown functions. The PO-EO-PO triblock structure with optimized PO to EO ratio enables the agent to simultaneously reduce foam accumulation during fermentation and effectively break down existing foam, improving overall foam management productivity.
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 surfactant effectively controls foam in fermentation processes by preventing foam formation and breaking existing foam, demonstrating superior performance in both roles compared to traditional agents.
Implementation Method 1
A primary alcohol surfactant having a PO-EO-PO triblock structure having a terminal PO to EO ratio from 1.00 to 2.00
Implementation Method 2
secondary alcohol's greater mobility from liquids to newly created interfaces (e.g., foam) compared to the primary alcohol foam control agents
Data Source
AI summary
A fermentation method includes steps of forming a broth having yeast, water and sugar; and contacting a foam control agent with the broth, a foam formed on the broth or both, wherein the foam control agent has structure (I) wherein R is a linear or branched alkyl group containing from 4 to 18 carbon atoms, m is from 1 to 10, n is from 9 to 15, o is from 15 to 25, and o/n is from 1.00 to 2.00.