VERFAHREN ZUM DEINKEN VON BEDRUCKTEM ALTPAPIER

申请公布号：DE2903150(A1)

申请号：DE19792903150

申请日期：1979.01.27

申请公布日期：1980.08.07

申请人：

HENKEL KGAA

发明人：HORNFECK,KLAUS;SCHWEIZER,DIETER,DIPL.-CHEM.DR.

分类号：B03D1/01;D21C5/02;(IPC1-7):D21C5/02

主分类号：B03D1/01

摘要：<p>1. A process for deinking printed waste paper by treating the paper pulp in a pulper at alkaline pH-values with alkali silicate, oxidising bleaches, higher fatty acids or their salts and nonionic dispersants and separating off the detached particles of printing ink from the fibre suspension by flotation, characterized in that a fatty acid alkanolamide corresponding to the following general formula see diagramm : EP0013758,P5,F1 in which R1 represents a C10 -C22 -alkyl or alkenyl group, R2 represents H or (CH2 )n OH and n is an integer of from 2 to 4 is added to the pulper in a quantity of from 1 to 20 % by weight, based on the fatty acid or fatty acid salt.</p>

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