Glutaraldehyde Biocidal Compositions for High-Temperature Stability
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Solution Overview
Problem
Current biocides used in oil and gas operations are not effective against a wide range of microorganisms, particularly anaerobic sulfate-reducing bacteria, and are unstable at high temperatures, leading to issues like reservoir souring and microbiologically influenced corrosion.
Innovation Solution
A synergistic combination of glutaraldehyde with 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane, tris(hydroxymethyl)-nitromethane, or hexahydrotriazine compounds, which maintains efficacy at varying temperatures and in the presence of reducing agents like sulfides, providing long-lasting microbial control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If glutaraldehyde is used as a biocide, then fast-acting microbial control is achieved, but thermal stability is lost at high temperatures
Solution Approach 1:
The patent combines glutaraldehyde with a second biocide compound to create a synergistic mixture. This merging allows the composition to maintain fast-acting biocidal properties while gaining thermal stability from the combination, resolving the contradiction between speed and stability.
Solution Approach 2:
The invention uses a composite biocidal composition consisting of glutaraldehyde and a second biocide compound. This composite material approach allows the system to exhibit properties that neither component alone could provide, specifically achieving both rapid biocidal action and high-temperature stability.
2Reliability
If conventional biocides are used, then microbial control is achieved, but effectiveness against wide range of microorganisms including anaerobic SRB is insufficient
Solution Approach 1:
The biocidal composition is designed to be universally effective against multiple types of microorganisms including aerobic bacteria, anaerobic sulfate-reducing bacteria, and other contaminants. The synergistic combination of biocides provides multi-functional coverage that single biocides cannot achieve.
Solution Approach 2:
The patent utilizes parameter changes in the chemical environment, specifically pH adjustment to optimized ranges, to enhance the effectiveness of the biocidal composition against diverse microorganisms. This parameter optimization allows the composition to maintain reliability across different microbial targets.
3Ease of operation
If single biocides are used, then treatment simplicity is maintained, but long-term microbial control duration is insufficient
Solution Approach 1:
The synergistic biocidal composition provides continuous microbial control over extended periods. The combination of biocides creates a sustained protective effect that maintains efficacy throughout the desired service life, preventing microbial regrowth that would occur with single biocides.
4Reliability
If higher biocide dosages are used, then microbial control effectiveness is improved, but cost and environmental impact increase
Solution Approach 1:
The patent converts the potentially harmful excess biocide dosage into a benefit by using synergistic combinations. The synergistic effect allows lower quantities of biocides to achieve the same or better effectiveness, reducing both cost and environmental impact while maintaining reliability.
Data Source
AI summary
Provided are biocidal compositions comprising glutaraldehyde and a compound selected from the group consisting of 1-(3-chloroallyl)-3,5,7-triaza-1-azoniaadamantane; tris(hydroxymethyl)-nitromethane; and a hexahydrotriazine compound. The compositions are useful for controlling microorganisms in aqueous or water-containing systems.