Method and use involving naphthalene sulphonate salt(s) and polyethylene oxide, to improve retention and drainage

摘要

PCT No. PCT/CA92/00497 Sec. 371 Date Oct. 12, 1994 Sec. 102(e) Date Oct. 12, 1994 PCT Filed Nov. 9, 1992 PCT Pub. No. WO94/11575 PCT Pub. Date May 26, 1994The present invention relates to a method and a use of naphthalene sulphonate salt(s) under granulated form or as a condensed or diluted solution, and a solution of one or several polyethylene oxide having a molecular weight varying from 1x106 to 13x106, allowing for a mixture comprising lignocellulosic particles and an aqueous medium to significantly improve the retention of particles such as fines and fibres, on a wire screen and the drainage of the aqueous medium.