▎ 摘　　要

NOVELTY - Preparing lactic acid comprises (i) taking biomass glycerol as raw material and preparing glycerol aqueous solution, and (ii) introducing into an autoclave, adding graphene load nickel-copper bimetallic catalyst and sodium hydroxide solid, discharging high purity nitrogen gas, introducing into sealed reaction kettle, stirring and heating. USE - Used as lactic acid. ADVANTAGE - The lactic acid: has high catalytic activity and selectivity; and is economical and environmentally friendly.