Hydrocarbon Aromatic Measurement Using Aniline Cloud Point
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Solution Overview
Problem
Existing methods for measuring aromatic content in hydrocarbon solutions after hydrogenation reactions require a high-temperature solvent drying process, which is time-consuming and costly, and rely on expensive NMR instruments, leading to high analytical costs and measurement errors.
Innovation Solution
A method that measures aromatic content by mixing a hydrocarbon solution with aniline at a 1:1 ratio, heating until transparent, measuring the cloud point during cooling, and using a calibration curve to calculate aromatic content without solvent removal, utilizing only aniline as a reagent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional methods (H-NMR or MMAP analysis) are used to measure aromatic content, then measurement accuracy is achieved, but analysis time is significantly increased due to required high-temperature solvent drying process
Solution Approach 1:
The invention extracts and eliminates the time-consuming solvent drying process from the measurement procedure. By using cloud point analysis on the solution state directly after hydrogenation, the method removes the unnecessary high-temperature drying step while maintaining measurement accuracy, thereby significantly reducing analysis time.
Solution Approach 2:
The invention replaces expensive, complex NMR instrumentation with a simple, low-cost cloud point measurement system. The method uses basic laboratory equipment (temperature monitoring devices) instead of expensive NMR spectrometers, making the analysis more accessible and cost-effective while maintaining sufficient measurement precision.
2Measurement precision
If H-NMR analysis is used to measure aromatic content, then measurement accuracy is achieved, but analytical costs are significantly increased due to expensive instrument requirements
Solution Approach 1:
The invention replaces expensive NMR instrumentation with inexpensive cloud point measurement equipment. The method requires only basic temperature monitoring devices and simple mixing apparatus, eliminating the need for costly NMR spectrometers while maintaining adequate measurement precision for quality control purposes.
Solution Approach 2:
The invention substitutes complex NMR spectroscopy with a simpler physical measurement approach (cloud point temperature measurement). This replacement eliminates the need for expensive electromagnetic instrumentation while achieving the same analytical goal through a more straightforward physical property measurement.
3Productivity
If conventional methods are used to measure aromatic content in solution state, then measurement can be performed, but measurement accuracy is reduced due to solvent interference and measurement errors
Solution Approach 1:
The invention changes the measurement parameter from chemical composition analysis (NMR spectroscopy) to physical property measurement (cloud point temperature). This parameter change allows direct measurement of aromatic content in the solution state without solvent removal, maintaining both speed and accuracy by exploiting the temperature-dependent solubility characteristics of aromatic compounds.
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
This method significantly reduces analysis time, lowers costs, and enhances accuracy with minimal measurement errors, making it suitable for industrial applications.
Implementation Method 1
heating the mixed solution of the hydrocarbon compound solution and aniline until it becomes transparent
Implementation Method 2
measuring a cloud point while cooling the transparent mixed solution
Data Source
Figure 1
AI summary
The present disclosure relates to a method for measuring aromatic contents in a hydrocarbon solution. More specifically, it relates to a measurement method capable of quickly and accurately checking aromatic contents in a compound, particularly in a hydrocarbon, in a solution state without a high-temperature drying process.