Fenoxaprop Ester Buffer Stabilization
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Solution Overview
Problem
Fenoxaprop ester herbicides, such as fenoxaprop ethyl, degrade rapidly when mixed with certain other herbicides, like pyrasulfotole and bromoxynil, reducing the shelf life of herbicidal compositions.
Innovation Solution
A buffer system comprising an amine-containing material, like triethanolamine, is introduced to maintain the pH of the herbicidal composition between 4 and 8, stabilizing fenoxaprop esters and allowing inclusion of weak acid herbicides and safeners.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If fenoxaprop ester herbicide is mixed with weak acid herbicides, then the herbicidal composition can combat a wider variety of undesirable vegetation, but the fenoxaprop ester degrades more rapidly reducing shelf life
Solution Approach 1:
A buffer system acts as an intermediary between the fenoxaprop ester and weak acid herbicides, mediating their interaction by controlling the pH environment. The buffer prevents direct harmful chemical reactions while allowing both herbicides to coexist, thus enabling the mixture of incompatible herbicides without compromising stability or efficacy
2Productivity
If fenoxaprop ester is mixed with weak acid herbicides, then multiple herbicides can be applied in a single application, but the degradation of fenoxaprop ester increases
Solution Approach 1:
The buffer system changes the pH parameter of the herbicidal composition, maintaining it within a specific range (pH 4-8) where fenoxaprop ester remains stable. By controlling this critical parameter, the buffer prevents acid-catalyzed degradation reactions while allowing the herbicides to work effectively together
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 buffer system significantly reduces the degradation of fenoxaprop esters, enhancing the long-term storage stability of the herbicidal composition across various temperatures.
Implementation Method 1
A buffer system comprises an amine-containing material, like triethanolamine, is introduced to maintain the pH of the herbicidal composition between 4 and 8, stabilizing fenoxaprop esters
Data Source
AI summary
A herbicide composition includes a fenoxaprop ester and a weak acid buffer system. The buffer system maintains the herbicidal composition at a pH in the range of 4 to 8. In one non-limiting embodiment, the fenoxaprop ester is fenoxaprop ethyl. The buffer system can include an amine-containing material, such as a tertiary amine. The herbicide composition can include other herbicides, such as weak acid herbicides, for example pyrasulfotole, bromoxynil, and/or bromoxynil esters and can include one or more safeners.