US 12,422,416 B2
Estimation of alkyl substituent carbon number of aromatic compounds using gel permeation chromatography retention time and prediction models
Saroj Kumar Panda, Dhahran (SA); Mohamed S. Elanany, Jeddah (SA); Abdullah A. Al-Zahrani, Dammam (SA); Hendrik Muller, Al Khobar (SA); and Sarafaraz Alam, Al Khobar (SA)
Assigned to Saudi Arabian Oil Company, Dhahran (SA)
Filed by Saudi Arabian Oil Company, Dhahran (SA)
Filed on Nov. 22, 2022, as Appl. No. 17/992,324.
Prior Publication US 2024/0167987 A1, May 23, 2024
Int. Cl. G01N 30/00 (2006.01); G01N 30/46 (2006.01); G01N 30/72 (2006.01); G01N 30/86 (2006.01); G01N 30/02 (2006.01); G01N 30/88 (2006.01)
CPC G01N 30/7206 (2013.01) [G01N 30/461 (2013.01); G01N 30/8665 (2013.01); G01N 2030/025 (2013.01); G01N 2030/8854 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method of determining a carbon number of an alkyl substituent of an aromatic compound, the method comprising:
using chromatography to measure a retention time of the aromatic compound;
determining a physical parameter of the aromatic compound using the measured retention time of the aromatic compound and a first prediction model comprising a calibration curve of the physical parameter as a function of retention time or a parameter derived from the retention time; and
determining a carbon number for the alkyl substituent of the aromatic compound using the physical parameter of the aromatic compound and a second prediction model comprising a calibration curve of the carbon number of the alkyl substituent as a function of the physical parameter.