| 摘要 |
<p>PCT No. PCT/CA93/00233 Sec. 371 Date Feb. 13, 1995 Sec. 102(e) Date Feb. 13, 1995 PCT Filed Jun. 2, 1993 PCT Pub. No. WO93/24702 PCT Pub. Date Dec. 9, 1993A waste paper treatment process for the recycle and re-use of waste paper, which process comprises treating the waste paper, in a repulper, with a surfactant, in the absence of traditional repulper chemicals such as silicate, caustic and peroxide. The surfactant is preferably a copolymer of ethylene oxide and propylene oxide, and is used in a sufficient concentration to form ink agglomerates. The ink agglomerates are retained on the paper, rather than being removed as in waste paper deinking. The process permits the elimination of normal repulper chemicals, and reduces the amount of ink sludge generated, while providing acceptable brightness levels for the recycled pulp.</p> |
