US 12,153,030 B2
Method for measuring a degree of homogeneity of oils using back titration and measuring apparatus using the same
Kang-Seok Go, Daejeon (KR); Nam-Sun Nho, Daejeon (KR); Kwang-Ho Kim, Daejeon (KR); Eun Hee Kwon, Daejeon (KR); Suk Hyun Lim, Jeonju-si (KR); Hung Hai Pham, Daejeon (KR); and Anh Dung Pham, Daejeon (KR)
Assigned to KOREA INSTITUTE OF ENERGY RESEARCH, Daejeon (KR)
Filed by KOREA INSTITUTE OF ENERGY RESEARCH, Daejeon (KR)
Filed on Dec. 28, 2020, as Appl. No. 17/134,535.
Claims priority of application No. 10-2019-0177997 (KR), filed on Dec. 30, 2019.
Prior Publication US 2021/0199633 A1, Jul. 1, 2021
Int. Cl. G01N 31/16 (2006.01); B01D 21/08 (2006.01); G01N 21/33 (2006.01)
CPC G01N 31/16 (2013.01) [B01D 21/08 (2013.01); G01N 21/33 (2013.01); B01D 2251/208 (2013.01); B01D 2257/7027 (2013.01)] 4 Claims
OG exemplary drawing
 
1. An apparatus A method for measuring miscibility in oil using back titration, the apparatus method comprising:
obtaining a flocculation solution comprising
an oil, the oil comprising asphaltene, and
a flocculant to precipitate the asphaltene,
wherein an amount of the flocculant in milliliters in the flocculation solution is 20 to 60 times a mass of the oil in grams in the flocculation solution;
measuring a UV transmittance of the flocculation solution while adding a dissolving agent to the flocculation solution; and
calculating the miscibility in the oil from the amount of dissolving agent added and a change in the UV transmittance,
wherein the miscibility is calculated based on a time point at which a slope of increase in the ultraviolet transmittance changes,
wherein the oil has an asphaltene content of 0.5 wt % to 20 wt %, and
wherein the oil is upgraded oil.