US 12,455,239 B2
Identification of π-interactions of mesophase formation, and methods related thereto
Kazem V. Edmond, Lebanon, NJ (US); David L. Perkins, Wind Gap, PA (US); and Daniella Mendez, Cedar Grove, NJ (US)
Assigned to Exxon Mobil Technology and Engineering Company, Spring, TX (US)
Filed by ExxonMobil Technology and Engineering Company, Annandale, NJ (US)
Filed on Aug. 1, 2022, as Appl. No. 17/816,526.
Prior Publication US 2024/0035972 A1, Feb. 1, 2024
Int. Cl. G01N 21/64 (2006.01); G01N 33/28 (2006.01)
CPC G01N 21/6428 (2013.01) [G01N 33/2823 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
interacting fluorescent light with a pitch composition;
receiving fluorescence emissions from the pitch composition;
acquiring a fluorescent light image via a band-pass excitation filter and a long-pass emission filter of the received fluorescence emissions;
identifying spatial variations in the fluorescent light images, wherein the spatial variations are a measure of change in a hydrogen to carbon ratio as measured according to ASTM D5291; and
identifying mesophase region and isotropic region in the pitch composition by quantitatively characterizing variations in composition based at least in part on the hydrogen to carbon ratio.