Inhibited Hydrofluoric Acid Composition for Safer Acidizing
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Solution Overview
Problem
The use of hydrofluoric acid in industries poses significant health and environmental risks due to its high reactivity and corrosiveness, lacking a safe and effective alternative for handling, storage, and transportation.
Innovation Solution
A process is developed to create an inhibited hydrofluoric acid composition by combining hydrofluoric acid with a weak base and alkanolamine, such as monoethanolamine, in a specific molar ratio to reduce its reactivity and safety hazards, while maintaining its ability to dissolve materials like sand and metal oxides, and can be reactivated with HCl for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If hydrofluoric acid is used for industrial applications, then dissolving power and effectiveness are improved, but dermal toxicity and safety hazards worsen
Solution Approach 1:
The patent introduces an intermediary substance that forms a complex with hydrofluoric acid, reducing its dermal toxicity while preserving its dissolving power. The intermediary acts as a mediator between the acid and biological tissues, preventing direct harmful contact while allowing the acid to perform its industrial function of dissolving materials like sand and metal oxides.
Solution Approach 2:
The patent changes the chemical parameters of hydrofluoric acid by adjusting concentration, temperature, and pH levels to reduce dermal toxicity. By modifying these parameters, the acid maintains its effectiveness for dissolving materials while becoming safer for handling and storage during transportation.
2Reliability
If hydrofluoric acid is stored and transported, then industrial supply is ensured, but safety risks and handling restrictions increase
Solution Approach 1:
The patent extracts the harmful properties of hydrofluoric acid by separating the toxic component or by removing the acid from its most dangerous concentrated form. This allows the acid to be stored and transported in a safer state while still ensuring reliable supply for industrial applications when needed.
Solution Approach 2:
The patent converts the harmful properties of hydrofluoric acid into beneficial ones by using the same chemical characteristics that make it dangerous (high reactivity and dissolving power) and directing them toward useful industrial applications while controlling the conditions to prevent harm during storage and transportation.
3Productivity
If conventional mud acid is used for well treatment, then acidizing effectiveness is achieved, but skin irritation and environmental damage worsen
Solution Approach 1:
The patent introduces an intermediary substance in the mud acid composition that reduces skin irritation while maintaining acidizing effectiveness. This intermediary acts as a protective agent that allows the acid to perform its function of dissolving formation materials in well treatments without causing severe skin irritation to workers.
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 inhibited hydrofluoric acid composition significantly reduces dermal toxicity and skin irritation, allowing safer handling and storage, while maintaining the dissolving power of regular mud acids, and can be reactivated to match or exceed the performance of standard HCl mud acids, offering a safer and more manageable alternative for industrial applications.
Implementation Method 1
combining hydrofluoric acid with a weak base and alkanolamine, such as monoethanolamine, in a specific molar ratio to reduce its reactivity
Implementation Method 2
maintaining its ability to dissolve materials like sand and metal oxides
Data Source
AI summary
A process for controlling the heat generated during the manufacture an inhibited hydrofluoric acid aqueous composition comprising:hydrofluoric acid in solution;a weak base; andan alkanolamine;said process comprising the steps of:providing a pre-determined amount of weak base;adding a pre-determined amount of said hydrofluoric acid to said weak base and obtaining a solution;adding said alkanolamine to the resulting solution of hydrofluoric acid and weak base;mixing until all components are dissolved;wherein said alkanolamine and hydrofluoric acid are present in a molar ratio of at least 1:1.