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:
Feb. 24, 2026
Filed:
Jul. 13, 2022
Saudi Arabian Oil Company, Dhahran, SA;
Faisal Mohammed Alissa, Dammam, SA;
Abdulaziz A. Alaboud, Dhahran, SA;
Saroj Kumar Panda, Dhahran, SA;
SAUDI ARABIAN OIL COMPANY, Dhahran, SA;
Abstract
A surface-modified activated carbon includes activated carbon, a plurality of sulfonate groups, and a plurality of metal atoms. The sulfonate groups are chemically bonded to the activated carbon, and the metal atoms are independently chemically bonded to the sulfonate groups. The surface-modified activated carbon has a net positive charge. A method for producing a surface-modified activated carbon includes mixing activated carbon with a sulfur-containing compound including sulfonate groups, chemically bonding the sulfonate groups the activated carbon to produce sulfonated activated carbon, combining the sulfonated activated carbon with a solution containing metal atoms, and chemically bonding the metal atoms to the sulfonate group. A method for removing an impurity in a subterranean well includes introducing a surface-modified activated carbon into the subterranean well containing a produced water containing an impurity, contacting the impurity with the surface-modified activated carbon, and adsorbing the impurity with the surface-modified activated carbon.