Binary Cleaning Composition for Mineral Grease Removal
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Solution Overview
Problem
Current cleaning agents, such as 1-chloro-3,3,3-trifluoropropene (HFCO-1233zd), are inefficient for removing certain greases, particularly mineral greases loaded with lithium/calcium or complex lithium, and have limitations in terms of environmental impact and flammability when used alone or in ternary mixtures with TDCE and methylacetate.
Innovation Solution
A binary composition of 1-chloro-3,3,3-trifluoropropene and 1,2-transdichloroethylene, where the former represents at least 99% by mass, with a mass ratio between 57:43 and 65:35, is used for cleaning solid surfaces, offering improved cleaning efficiency and reduced environmental impact, including lower risks of ignition and toxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If HFCO-1233zd is used alone or in ternary mixture for cleaning, then environmental impact is reduced (low GWP), but cleaning efficiency for certain greases remains unsatisfactory
Solution Approach 1:
The patent combines HFCO-1233zd with TDCE in a binary mixture to achieve synergistic cleaning effects. This combination allows the composition to effectively remove difficult greases (mineral greases with lithium/calcium or complex lithium) while maintaining low environmental impact, resolving the contradiction between cleaning efficiency and environmental friendliness
Solution Approach 2:
The invention creates a composite cleaning composition using HFCO-1233zd and TDCE as the two main components. This composite approach leverages the complementary properties of both substances: HFCO-1233zd provides low GWP and environmental benefits, while TDCE enhances cleaning power against stubborn greases, achieving both high productivity and low harmful factors
2Productivity
If ternary mixture with methylacetate is used, then cleaning performance is improved, but device complexity and composition complexity increase
Solution Approach 1:
The patent extracts methylacetate from the ternary mixture and eliminates it entirely, creating a simplified binary composition of HFCO-1233zd and TDCE. This extraction removes the unnecessary third component while maintaining or improving cleaning performance, thereby reducing composition complexity without sacrificing productivity
3Productivity
If HFCO-1233zd concentration is increased, then cleaning efficiency improves, but flammability and ignition risks increase
Solution Approach 1:
The patent optimizes the concentration parameters of both HFCO-1233zd and TDCE within specific ranges (HFCO-1233zd: 35-70% by weight, TDCE: 30-65% by weight). This parameter optimization achieves the right balance between cleaning efficiency and flammability control, allowing effective grease removal while maintaining acceptable safety margins against ignition risks
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 binary composition effectively cleans greases with improved physicochemical properties, such as low Global Warming Potential (GWP) and reduced flammability, outperforming HFCO-1233zd alone or in ternary mixtures, especially for mineral greases, while maintaining safety and efficiency in vapor phase cleaning.
Implementation Method 1
A liquid composition comprising 1-chloro-3,3,3-trifluoropropene and 1,2-transdichloroethylene for cleaning solid surfaces
Implementation Method 2
The binary composition effectively cleans greases with improved physicochemical properties
Implementation Method 3
According to one embodiment, the liquid composition is vaporized during cleaning
Data Source
AI summary
The invention relates to the use of a liquid composition including 1-chloro-3,3,3-trifluoropropene and 1,2-transdichloroethylene for cleaning solid surfaces, the 1-chloro-3,3,3-trifluoropropene and the 1,2-transdichloroethylene being at least 99 wt% of the composition. The invention also relates to a liquid composition containing 1-chloro-3,3,3-trifluoropropene and 1,2-transdichloroethylene, the 1-chloro-3,3,3-trifluoropropene and 1,2-transdichloroethylene being at least 99 wt% of the composition and the weight ratio of the 1-chloro-3,3,3-trifluoropropene over the 1,2-transdichloroethylene being between 57:43 and 65:35, preferably between 58:42 and 63:37, and more preferably between 59:41 and 61:39.