▎ 摘　　要

NOVELTY - A graphene adsorbent comprises 2.4-3.2 pts. wt. diethanolamine, 10-18 pts. wt. graphene, 1.5-2.5 pts. wt. bismuth oxide, 2-4 pts. wt. ferric oxide, 2.2-3.6 pts. wt. aluminum oxide, 0.6-1.5 pts. wt. sodium nitrite, 4-8 pts. wt. aldehyde, 46-63 pts. wt. ethylene glycol, 1.8-5 pts. wt. polyacrylamide, 5-10 pts. wt. strong alkali solution, 1.6-3 pts. wt. surfactant, 2-3 pts. wt. phenol, and 6.5-9 pts. wt. radix isatidis. USE - Graphene adsorbent is used for desulfurizing crude oil. ADVANTAGE - The graphene adsorbent uses a wide raw material source and has high specific surface area. Modification with strong alkaline solution, sodium nitrite, and surfactant improves the surface activity of graphene. The synergistic effect with other components improves the absorption effect of sulfide in crude oil. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of graphene adsorbent, which involves crushing radix isatidis at -8 degrees C to -3 degrees C, sieving using a 20-40-mesh sieve, adding 6-10 times water to radix isatidis, soaking for 3-5 hours at room temperature, mixing, adding enzyme, enzymolyzing to obtain radix isatidis enzymolyzed liquid, adding crushed graphene of 80-100 mesh to ethylene glycol, ultrasonically dispersing at low intensity to obtain graphene suspension, adding bismuth oxide, ferric oxide, aluminum oxide, strong alkali solution, surfactant, sodium nitrite, and phenol to graphene suspension, magnetically stirring at 43-52 degrees C to obtain mixed solution (A), mixing diethanolamine, acetaldehyde, and radix isatidis enzymolyzed liquid, placing at 3-8 degrees C, and cooling for 20-36 hours to obtain mixed solution (B), mixing polyacrylamide and mixed solutions (A,B), shaking for 90-150 minutes, drying, and grinding to 120-150 mesh.