▎ 摘　　要

NOVELTY - Biological enzyme deinking agent comprises 1-5 pts. wt. biological enzyme, 15-70 pts. wt. surfactant, 0.1-10 pts. wt. modified graphene oxide, 20-100 pts. wt. water. The modified graphene oxide is graphene oxide loaded with nano-metal particles. USE - The deinking agent is useful in deinking process. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing biological enzyme deinking agent, comprising (i) adding waste paper and water into the pulping machine relative to absolute dry pulp, adding 0.1-0.5 wt.% deinking agent, maintaining the temperature at 40-60 degrees C, adjusting pH value at 7-10, pulping for 15-25 minutes to obtain pulp solution, (ii) adding pulp solution in flotation groove and making the pulp consistency to 0.5-1% at 40-60 degrees C for 10-15 minutes, (iii) washing the slurry with water for 3-5 minutes to obtain the deinking pulp.