Solvent Blend Cleaner for Reflux Cleaning Contradictions
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Solution Overview
Problem
Conventional reflux cleaning methods using commodity solvents like methanol and acetone are inefficient, require repeated cycles for thorough cleaning, pose safety and environmental hazards, and incur high energy and disposal costs, while lacking assurance of complete soil removal.
Innovation Solution
Development of an environmentally friendly solvent-based cleaner formulation that combines solvents with specific properties for enhanced solvency and wetting capabilities, usable in both vapor and liquid phases, which can be used in refluxing, CIP, and manual cleaning processes without the need for additional equipment, incorporating surfactants and other additives to reduce solvent levels and improve cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If conventional commodity solvents (methanol, acetone) are used for reflux cleaning, then the cleaning process can be performed with simple equipment, but multiple cleaning cycles are required and complete soil removal cannot be assured
Solution Approach 1:
The patent changes the chemical parameters of the cleaning solvent by using a specially formulated blend with superior solvency properties instead of conventional commodity solvents. This formulation achieves complete soil removal in a single cycle, transforming the cleaning process from requiring multiple repetitions to achieving thorough cleaning in one pass, thereby resolving the contradiction between equipment simplicity and cleaning efficiency
Solution Approach 2:
The invention employs a composite solvent formulation comprising multiple components workingly combined to achieve enhanced cleaning performance. This composite cleaner combines the benefits of different solvent types to provide both the simplicity of reflux cleaning and the thoroughness previously requiring complex CIP systems, thus resolving the contradiction between device complexity and productivity
2Device complexity
If conventional commodity solvents are used for reflux cleaning, then the process requires no additional equipment, but significant energy costs are incurred for solvent recycling and recovery
Solution Approach 1:
The patent applies the principle of using a disposable-like approach with the cleaning solvent, where the specially formulated cleaner is used and then disposed of after a single cleaning cycle, eliminating the need for energy-intensive recycling and recovery processes. This resolves the contradiction by accepting single-use operation over solvent recovery, significantly reducing energy consumption while maintaining equipment simplicity
Solution Approach 2:
The invention deliberately chooses to discard the solvent after one use rather than recovering and recycling it, thereby eliminating the energy-intensive recovery processes required for conventional solvents. This approach trades solvent cost for energy savings, resolving the contradiction between equipment simplicity and energy loss
3Ease of operation
If conventional commodity solvents are used for reflux cleaning, then the process is simple to operate, but safety issues arise due to flammability and volatility
Solution Approach 1:
The patent converts the harmful properties of conventional solvents (flammability and volatility) into beneficial characteristics by formulating a cleaner that uses these properties moderately while incorporating fire suppressants. The formulation achieves effective cleaning with reduced flammability risk, resolving the contradiction between ease of operation and safety hazards by transforming the harmful aspects into controlled, beneficial features
4Ease of manufacture
If conventional commodity solvents are used for reflux cleaning, then the solvents are readily available, but environmental regulations compliance becomes problematic
Solution Approach 1:
The invention creates a composite cleaning formulation that combines readily available solvent components with environmentally benign additives. This composite cleaner maintains the availability advantage of conventional solvents while achieving compliance with environmental regulations through its specially designed composition, thereby resolving the contradiction between ease of manufacture and environmental compliance
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 solvent blend achieves faster cleaning cycles, reduces energy consumption, minimizes health and safety risks, and complies with environmental regulations, providing a cost-effective and thorough cleaning solution for chemical and pharmaceutical manufacturing equipment.
Implementation Method 1
The vapors created by the heated solvent replace the air above the tank and travel through the piping to the next piece of equipment
Implementation Method 2
In the overhead spaces, condensers are present to cool the vapor to a liquid. Liquid solvent is then drained out into a sump
Implementation Method 3
these solvents are typically part of the production process, and therefore, are readily available and not a new ingredient being introduced as a potential contaminant. The vapors created by the heated solvent
Data Source
AI summary
A solvent blend cleaner useful for reflux cleaning of chemical manufacturing equipment, including that used in manufacturing pharmaceuticals, comprises a blend of environmentally friendly and safe solvents selected on the basis of specific criteria, such as vapor pressure, vapor density, boiling point, specific heat, and heat of vaporization, among other things; achieves excellent cleaning even upon further dilution with water; and avoids the disadvantages associated with the use of conventional commodity solvents in reflux cleaning methods. Desired solvency, cleaning and wetting properties of the inventive formulations in use can be achieved through blending of solvents having the selected criteria. Additives, such as surfactants, can be added to enhance cleaning and lower solvent requirements.