发明名称 METODO PARA REMOVER A TINTA DE PAPEL USADO
摘要 <p>The present invention relates to a method of removing ink from secondary fiber by contacting a pulp of said secondary fiber with an aqueous medium in the presence of a polymeric material having a glass transition temperature in the range of from about 20 DEG C. to about 70 DEG C. and a substituted polyethylene oxide to agglomerate the ink into discrete masses and separating the agglomerated ink from the pulp-containing aqueous medium.</p>
申请公布号 PT90245(A) 申请公布日期 1989.11.30
申请号 PT19890090245 申请日期 1989.04.11
申请人 PPG INDUSTRIES, INC. 发明人
分类号 D21C5/02;(IPC1-7):C09D9/00 主分类号 D21C5/02
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