Method for measuring aromatic contents in hydrocarbon solution

Patent metadata

Field	Value
Publication number	US-11391684-B2
Application number	US-201816769690-A
Country	US
Kind code	B2
Filing date	Nov 29, 2018
Priority date	Dec 27, 2017
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

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.

First claim

What is claimed is:

1. A method for measuring aromatic contents, comprising the steps of:
mixing a hydrocarbon solution and aniline at room temperature in a volume ratio of 1:1;
heating the mixed solution of the hydrocarbon solution and aniline until it becomes transparent;
measuring a cloud point while cooling the transparent mixed solution; and
calculating aromatic contents in the hydrocarbon solution by substituting the cloud point into a calibration curve.

2. The method for measuring aromatic contents of claim 1 ,
wherein the hydrocarbon solution contains 10 to 90 wt % of hydrocarbon.

3. The method for measuring aromatic contents of claim 1 ,
wherein the steps of heating and cooling the mixed solution are performed while stirring the mixed solution.

4. The method for measuring aromatic contents of claim 1 ,
wherein the step of cooling the transparent mixed solution is performed at a cooling rate of 2° C./min or less.

5. The method for measuring aromatic contents of claim 1 ,
wherein the calibration curve is a graph indicating a relationship between the aromatic contents and the cloud point in the hydrocarbon to be measured obtained by measuring the aromatic contents of the same compound as the hydrocarbon to be measured in advance by H-NMR analysis.

6. The method for measuring aromatic contents of claim 1 ,
wherein the hydrocarbon solution is obtained after a hydrogenation reaction.

7. The method for measuring aromatic contents of claim 1 ,
wherein the hydrocarbon is a petroleum resin.

8. The method for measuring aromatic contents of claim 1 ,
wherein a solvent of the hydrocarbon solution is an organic solvent containing no aromatics.

Assignees

• Hanwha Solutions Corp

Inventors

• Lee Yong Hee
• Myeong Wan Jae
• Park Woo Jin
• Jeon Bong Sik
• Jung Eui Geun

Classifications

• G01N33/2811

  by measuring cloud point or pour point of oils · CPC title

• G01N33/2823 Primary

  Raw oil, drilling fluid or polyphasic mixtures · CPC title

• G01N24/08

  by using nuclear magnetic resonance (G01N24/12 takes precedence) · CPC title

• G01N24/082

  Measurement of solid, liquid or gas content · CPC title

• G01N25/12 Primary

  of critical point; of other phase change · CPC title