Low pH Phenolic Disinfectant Formulation Without PTAP
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Solution Overview
Problem
The environmental toxicity concerns surrounding para tertiary amylphenol (PTAP) have led to its ban in Europe, necessitating a replacement for phenolic disinfectants that are effective against hard surface disinfection.
Innovation Solution
A concentrated phenolic disinfectant solution is developed using ortho phenylphenol, ortho-benzyl parachlorophenol, and parachloro-meta-cresol, combined with hydrotropic surfactants like sodium xylene sulfonate and sodium caprylyl sulfonate, and phosphoric acid, which maintains efficacy while avoiding traditional emulsion and solubilizing surfactants that reduce effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If PTAP is used as a disinfectant, then disinfection efficacy is achieved, but environmental toxicity increases leading to bans
Solution Approach 1:
The invention extracts and removes PTAP from the disinfectant formulation, replacing it with alternative phenolic compounds (ortho-phenylphenol, ortho-benzyl parachlorophenol, and parachloro-meta-cresol) that maintain disinfection efficacy without the environmental toxicity associated with PTAP
Solution Approach 2:
The invention changes the chemical composition parameters by substituting PTAP with alternative phenolic compounds and adjusting the formulation to include specific surfactants (sodium octyl sulfate, sodium xylene sulfonate, sodium caprylyl sulfonate) and pH modifiers (phosphoric acid) to achieve both efficacy and environmental safety
2Stability of the object's composition
If traditional emulsifying and solubilizing surfactants are added to phenolic disinfectant, then solubility improves, but disinfectant efficacy is adversely affected
Solution Approach 1:
The invention introduces hydrotropic surfactants (sodium octyl sulfate, sodium xylene sulfonate, sodium caprylyl sulfonate) as intermediary substances that facilitate the solubility of phenolic compounds without interfering with their disinfectant activity, unlike traditional emulsifying and solubilizing surfactants
Solution Approach 2:
The invention changes the surfactant type parameter from traditional emulsifying/solubilizing surfactants to hydrotropic surfactants, and adjusts the pH parameter using phosphoric acid to optimize both solubility and disinfectant efficacy simultaneously
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 solution provides broad-spectrum disinfection, stability against gamma-irradiation, and is free of PTAP, making it suitable for hard surfaces, tuberculocidal, fungicidal, bactericidal, and virucidal applications without the environmental hazards associated with PTAP.
Implementation Method 1
Hydrotropic surfactants are utilized such as, sodium octyl sulfate, sodium xylene sulfonate, and sodium caprylyl sulfonate
Implementation Method 2
an acid such as phosphoric acid
Implementation Method 3
solvents such as an aliphatic alcohol
Data Source
AI summary
The present invention relates to phenol containing disinfectants that have superior broad-spectrum antimicrobial efficacy versus traditional chemistry such as quaternary ammonium-containing disinfectants or aliphatic alcohols. Hydrotropic surfactants are utilized in combination with generally environmentally friendly phenol containing compounds such as ortho-benzyl parachlorophenol (OBPCP), ortho phenylphenol (OPP), or parachloro-meta-cresol (PCMC) in the presence of suitable solvents such as an aliphatic alcohol and also in the presence of an inorganic acid, such as phosphoric acid. The solutions are free of para tertiary amylphenol (PTAP), have a low pH and are very stable with respect to gamma irradiation. They can be used with respect to hard surface disinfection, and also as a tuberculocide, a fungicide, a bactericide, and a virucide.