The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2025
Filed:
Nov. 17, 2022
Saudi Arabian Oil Company, Dhahran, SA;
Omer Refa Koseoglu, Dhahran, SA;
Saroj Kumar Panda, Dhahran, SA;
Robert Peter Hodgkins, Dhahran, SA;
Saudi Arabian Oil Company, Dhahran, SA;
Abstract
Disclosed are methods and systems for quantitation of benzene, toluene, ethyl benzene, o-xylene, m-xylene, and p-xylene in aromatics recovery complexes. High-performance liquid chromatography using a carbon stationary phase and a gradient mobile phase is performed. The carbon stationary phase can be a porous graphitic carbon stationary phase. The mobile phase includes an organic acid in water and an alcohol. The organic acid can include formic acid, and the alcohol can include methanol. The methods and systems achieve a resolution between xylene isomer peaks of greater than 2.0 when sampling industrial process streams in aromatic recovery complexes.