| 摘要 |
<p>PCT No. PCT/EP90/01122 Sec. 371 Date Jan. 13, 1992 Sec. 102(e) Date Jan. 13, 1992 PCT Filed Jul. 10, 1990 PCT Pub. No. WO91/01405 PCT Pub. Date Feb. 7, 1991.According to the invention, wastepaper is refined in the presence of alkoxylation products obtainable by reaction of alkylene oxides with C10-22 carboxylic acid derivatives and/or C10-22 carboxylic acids containing carboxylic acid residues with at least one OH group in the 9, 10, 13 and/or 14 position and the detached printing ink particles are subsequently removed from the paper stock suspensions by flotation or washing.</p> |
