▎ 摘　　要

NOVELTY - Preparing color offset newsprint comprises (i) adding waste paper and water to rotary drum pulping machine for pulping, adding liquid deinking agent, sodium hydroxide, and sodium silicate, controlling temperature, and crushing to obtain slurry, (ii) adding slurry to front flotation groove, adding sodium soap deinking agent, diluting slurry to slurry, and pre-floating, (iii) adding slurry to heat dispersion system for dispersing heat, and controlling temperature, and power to obtain slurry, (iv) concentrating slurry to slurry, adding to front flotation groove, adding sodium soap deinking agent and adhesive control agent, diluting slurry to slurry, and post floating, (v) adsorbing by mixing and diluting the slurry with water, adding talc nanoparticles supported by metal organic frameworks (MOF) aerogel, and stirring, and filtering to obtain filtrate, and (vi) adding filtrate to paper machine flow conveying system, diluting pulp, adding dyes, forming and drying. USE - The method is useful for preparing color offset newsprint. ADVANTAGE - The method: improves the hydrophobic and lipophilic properties of graphene after ascorbic acid reduction. The aerogel formed by the complex of UIO-66-carboxylic acid nanoparticles and graphene has hydrophobicity and lipophilicity and a large specific surface area, which can completely absorb the fine ink particles in the slurry. DETAILED DESCRIPTION - Preparing color offset newsprint comprises (i) adding waste paper and water to rotary drum pulping machine for pulping, adding liquid deinking agent, sodium hydroxide, and sodium silicate, controlling temperature at 45-65degreesC, and crushing for 15-25 minutes to obtain slurry with pH value of 8 and slurry concentration of 3.5-4%, (ii) adding slurry to front flotation groove, adding sodium soap deinking agent, diluting slurry to slurry concentration of 0.6-1.5% with pH value of 7-7.5, and pre-floating for 10-25 minutes, (iii) adding slurry to a heat dispersion system for dispersing heat, and controlling temperature at 85-90degrees Celsius, and power 800-1200 kwh/t to obtain slurry with dryness of 25-30, (iv) concentrating slurry to slurry concentration of 10-12%, adding to front flotation groove, adding sodium soap deinking agent and adhesive control agent, diluting slurry to slurry concentration of 0.6-1.5% with pH value of 7-7.5, and post floating for 10-25 minutes, (v) adsorbing by mixing and diluting the slurry with water in mass ratio of 1:5-10, adding talc nanoparticles supported by metal organic frameworks (MOF) aerogel, and stirring for 10-20 minutes, and filtering to obtain filtrate, and (vi) adding filtrate to a paper machine flow conveying system, diluting pulp to pulp concentration of 1-1.3%, adding dyes i.e. yellow, black, and red, forming and drying.