▎ 摘　　要

NOVELTY - An adsorbent comprises 80-90 pts. wt. graphene dispersion, 2-4 pts. wt. activated carbon, 2-5 pts. wt. potassium persulfate, 12-16 pts. wt. hydrogen peroxide, 5-8 pts. wt. metal oxide, 20-26 pts. wt. potassium permanganate, 4-7 pts. wt. acrylamide, 4-5 pts. wt. silver chloride and 3-5 pts. wt. dandelion. USE - Adsorbent used for desulfurization of crude oil. ADVANTAGE - The adsorbent has improved surface activity and strong adsorption effect, and forms a network structure composed of graphene and activated carbon, performs desulfurization at high efficiency, reduces the influence of sulfur component on the catalyst during oil refining, reduces the amount of catalyst used in hydrogenation catalysis and frequency of replacement, and also reduces the corrosiveness of the sulfur component to the equipment. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of adsorbent, which involves (S1) crushing dandelion, immersing in water at 45-58 degrees C for 30-40 minutes, then adding 4-6 times of water at 75-82 degrees C for 3-5 times, filtering and combining the decoction, obtaining dandelion extract, (S2) pulverizing to 1500-3000 mesh, adding graphene dispersion, adding acrylamide, heating at 60-75 degrees C for 5-8 hours with ultrasonic generator, filtering the product, immersing in dandelion extract, obtaining modified product, (S3) mixing potassium persulfate, hydrogen peroxide, metal oxide and modified product with silver chloride, adding potassium permanganate, stirring at 3000-3600 rpm for 15-40 minutes, drying and calcining to obtain finished product.