Patent ID: 7862685

Claim:
A method of deinking printed waste paper that comprises ink and paper pulp, comprising: a) converting the printed waste paper to an aqueous pulp slurry in a pulper; b) contacting said aqueous pulp slurry with a premixed deinking additive comprising an aqueous dispersible hydrophobically modified inorganic particle which comprises a contact product of mixing calcium carbonate, wherein the calcium carbonate is in a ratio with a deinking composition ranging from 1:1 to about 40:1, wherein the deinking composition comprises a fatty acid, and a nonionic surfactant, wherein the nonionic surfactant comprises a fatty alcohol comprising from 5 to about 100 moles of alkoxylation; c) separating said ink in the aqueous pulp slurry; and d) recovering deinked paper pulp from the aqueous pulp slurry.