US Patent No. 9,302,249

METHOD FOR PREPARING COMPOSITE SULFUR-MODIFIED POWDERED ACTIVATED CARBON


Patent No. 9,302,249
Issue Date April 05, 2016
Title Method For Preparing Composite Sulfur-modified Powdered Activated Carbon
Inventorship Chung-Shin Yuan, Kaohsiung (TW)
Iau-Ren Ie, Kaohsiung (TW)
Huazhen Shen, Kaohsiung (TW)
Assignee NATIONAL SUN YAT-SEN UNIVERSITY, Kaohsiung (TW)

Claim of US Patent No. 9,302,249

1. A method for preparing composite sulfur-modified powdered activated carbon, comprising the following steps:
(a) providing a powdered activated carbon;
(b) proceeding a drying step on the powdered activated carbon;
(c) proceeding a liquid-phase sulfur modification step on the dried powdered activated carbon, wherein the liquid-phase sulfur
modification step includes immersing the dried powdered activated carbon in a sulfur-containing solution, and the sulfur-containing
solution is a sodium sulfide (Na2S) solution of a mass ratio of 3% to 5%;

(d) proceeding a granulation step, so as to obtain a granular activated carbon from the sulfur-modified powdered activated
carbon; and

(e) proceeding a heating step on the granular activated carbon, so as to form the composite sulfur-modified powdered activated
carbon.