▎ 摘　　要

NOVELTY - Nano-functional graphene ultra-low mercury catalyst comprises 0.1-2.5 wt.% nano-mercuric chloride active agent, 1-5 wt.% nano-chloride compound synergist, 1-10 wt.% nano-rare earth chloride composite auxiliary agent, 1-10 wt.% nano-calcium chloride stabilizer, and balance functionalized graphene carrier. The functionalized graphene carrier is chlorine-doped graphene, sulfur-doped graphene or nitrogen-doped graphene. The nano-chloride compound synergist is nano-barium chloride and/or nano-zinc chloride. The nano-rare earth chloride composite auxiliary agent is e.g. nano-samarium chloride. USE - Nano-functional graphene ultra-low mercury catalyst. ADVANTAGE - The nano-functional graphene ultra-low mercury catalyst has reduced mercuric chloride content i.e. 0.1-2.5% from 2.5-6.5% of the prior art, good catalytic conversion effect, strong thermal stability, high strength and low mercury loss rate, and is mesoporous. DETAILED DESCRIPTION - Nano-functional graphene ultra-low mercury catalyst comprises 0.1-2.5 wt.% nano-mercuric chloride active agent, 1-5 wt.% nano-chloride compound synergist, 1-10 wt.% nano-rare earth chloride composite auxiliary agent, 1-10 wt.% nano-calcium chloride stabilizer, and balance functionalized graphene carrier. The functionalized graphene carrier is chlorine-doped graphene, sulfur-doped graphene or nitrogen-doped graphene. The nano-chloride compound synergist is nano-barium chloride and/or nano-zinc chloride. The nano-rare earth chloride composite auxiliary agent is nano-samarium chloride, nano-gadolinium chloride, nano-lanthanum chloride, and/or nano-cerium chloride. An INDEPENDENT CLAIM is included for preparation of nano-functional graphene ultra-low mercury catalyst comprising functionalized graphene carrier preprocessing by ultrasonically pretreating the functionalized graphene carrier i.e. chlorine-doped graphene, sulfur-doped graphene or nitrogen-doped graphene with 5-20 vol.% hydrochloric acid solution at 0.9-1.5 MHz for 20-90 minutes, centrifugally dewatering, microwave drying at controlled temperature of 85-110 degrees C until water content is less than 1%, preparing nano-mercuric chloride active agent immersion liquid by grinding crystal mercuric chloride into fineness of 50-150 nm, putting in dissolving tank, preparing nano-mercuric chloride water solution having a concentration of 1-20 mass%, and stirring at 20-50 degrees C and 100-500 revolutions/minute (rpm) for 40-60 minutes, preparing nano-chloride composite synergist immersion liquid by grinding the crystalline chloride compound synergist i.e. nano-barium chloride and/or nano-zinc chloride into fineness of 50-150 nm, putting in dissolving tank, preparing 1-30 mass% nano-chloride compound synergist mixed aqueous solution, and stirring at 20-50 degrees C and 100-500 rpm for 30-120 minutes, preparing nano-rare earth chloride composite auxiliary agent immersion liquid by grinding crystalline chloride rare earth composite auxiliary agent i.e. nano-samarium chloride, nano-gadolinium chloride, nano-lanthanum chloride, and/or nano-cerium chloride into fineness of 50-150 nm, putting in dissolving tank, preparing into 1-30 mass% mixed aqueous solution, stirring at 20-50 degrees C and 100-500 rpm for 30-120 minutes, preparing nano-calcium chloride stabilizer immersion liquid by grinding crystal calcium chloride into fineness of 50-150 nm, putting in dissolving tank, preparing into 1-40 mass% calcium chloride water solution, stirring at 20-50 degrees C and 100-500 rpm for 30-120 minutes, fluidized bed spraying sequentially the nano-mercuric chloride active agent immersion liquid and nano-chloride composite synergist immersion liquid in fluidized state onto the functionalized graphene, drying at constant temperature of 95 degrees C until water content is 0.1-5%, fluidized bed spraying sequentially the nano-rare earth chloride composite auxiliary agent immersion liquid and nano-calcium chloride stabilizer immersion liquid onto the carrier, drying at constant temperature until water content is 0.01-1%, controlling the temperature at 85-110 degrees C, and obtaining the product.