Heavy Aromatic Solvent Composition for Low-Temperature Fluidity
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Solution Overview
Problem
Heavy aromatic organic solvents face issues with solid precipitation and gelation at extremely low temperatures, leading to equipment clogging and reduced solvency, limiting their availability and causing corrosion.
Innovation Solution
An organic solvent composition comprising 50 to 75 wt% C10 aromatic hydrocarbon, 25 to 40 wt% C9 aromatic hydrocarbon, and less than 150 ppm naphthalene, with specific ratios of trimethylbenzene and tetramethylbenzene, achieving a pour point of -90° C. to -30° C. and improved solvency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If heavy aromatic organic solvents are used, then solvency and flash point are improved, but precipitates form and gelation occurs at low temperatures below -30°C
Solution Approach 1:
The patent changes the compositional parameters of the aromatic hydrocarbons by specifying precise weight ratios of C9 and C10 components and controlling naphthalene content below 150 ppm. This parameter optimization resolves the contradiction by achieving a balance that prevents precipitate formation while maintaining solvency and flash point properties.
Solution Approach 2:
The patent creates a composite aromatic hydrocarbon system combining C9 aromatic hydrocarbons (25-40 wt%) and C10 aromatic hydrocarbons (50-75 wt%) in specific ratios. This composite composition leverages the complementary properties of both components to prevent gelation while maintaining high solvency and flash point.
2Temperature
If heavy aromatic organic solvents are used, then flash point is improved, but fluidity is reduced at low temperatures
Solution Approach 1:
The patent optimizes the compositional parameters by controlling the ratio of C9 to C10 aromatic hydrocarbons and limiting naphthalene content. This parameter adjustment maintains high flash point while preventing the severe fluidity reduction that occurs in conventional heavy aromatic solvents at low temperatures.
Solution Approach 2:
The patent applies local quality by selecting specific isomers and components within the C9 and C10 aromatic hydrocarbon ranges that provide localized improvements in low-temperature fluidity while maintaining the overall high flash point characteristic of heavy aromatic solvents.
3Reliability
If aliphatic compounds are added to aromatic solvents, then solvency is improved, but fluidity is reduced and precipitation is accelerated at low temperatures
Solution Approach 1:
The patent extracts and eliminates problematic components from the solvent system by limiting naphthalene content below 150 ppm and carefully selecting the aromatic hydrocarbon composition. This removal of harmful components prevents the acceleration of precipitation and fluidity loss that would otherwise occur when aliphatic compounds are added to aromatic solvents.
4Reliability
If heavy aromatic organic solvents are stored or transported in extreme environments below -30°C, then availability is limited by precipitate formation and gelation
Solution Approach 1:
The patent changes the compositional parameters to achieve a pour point of -50°C or lower, which enables the solvent to maintain stability and availability in extreme cold environments. This parameter optimization resolves the contradiction by allowing the solvent to be stored and transported reliably below -30°C without precipitate formation or gelation.
Data Source
AI summary
The present invention relates to an organic solvent composition and a paint composition including the same, and more particularly, an organic solvent composition including 50 to 75 wt % of C10 aromatic hydrocarbon, 25 to 40 wt % of C9 aromatic hydrocarbon, and less than 150 ppm of naphthalene, in which a weight ratio of trimethylbenzene and tetramethylbenzene is 50:50 to 90:10.