▎ 摘　　要

NOVELTY - A graphene composite flame-retardant fire extinguishing agent comprises 26-30 pts. wt. plant extract, 10-12 pts. wt. ash, 3.5-4.5 pts. wt. graphene, 6-8 pts. wt. flame retardant, and remaining water. The plant extract comprises 20-30 pts. wt. corn, 8-10 pts. wt. rag, 15-20 pts. wt. yam, 10-15 pts. wt. Ulmus bark, and 10-15 pts. wt. grapefruit skin. USE - Graphene composite flame-retardant fire extinguishing agent used for preparing fire-extinguishing product such as ointment, gel, foam, dry powder, and solution used in agriculture, forestry, animal husbandry, and fishery applications. ADVANTAGE - The environmentally-friendly graphene composite flame-retardant fire extinguishing agent has excellent flame-retardant and fire-extinguishing properties, reduces pollutant emissions, and soil damage, and improves water quality. DETAILED DESCRIPTION - A graphene composite flame-retardant fire extinguishing agent comprises 26-30 pts. wt. plant extract, 10-12 pts. wt. ash, 3.5-4.5 pts. wt. graphene, 6-8 pts. wt. flame retardant, and remaining water. The plant extract comprises 20-30 pts. wt. corn, 8-10 pts. wt. rag, 15-20 pts. wt. yam, 10-15 pts. wt. Ulmus bark, and 10-15 pts. wt. grapefruit skin. The plant extract is obtained by mixing corn, rag, yam, Ulmus bark, and grapefruit skin, drying, crushing, adding 10-12 times water, soaking for 2 hours, cooking for 2 hours, filtering to obtain filtrate (a), adding 10 times water to residue, ultrasonically extracting for 1 hour, and filtering to obtain filtrate (b), and combining filtrate (a) and filtrate (b). An INDEPENDENT CLAIM is included for preparation of graphene composite flame-retardant fire extinguishing agent, which involves (i) adding 15 times water to dry ash, soaking for 1 hour, boiling for 1 hour, and filtering to obtain filtrate, extracting the residue once, and combining the filtrates to obtain a plant ash leaching liquor, (ii) mixing plant ash leaching liquor with plant ash extract, adding graphene and flame retardant, uniformly mixing, ultrasonically processing for 30 minutes, and filtering the filtrate.