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OFFICE WASTEPAPER DEINKING PROCESS

机译:办公垃圾整理程序

摘要

This invention related to a process for the deinking of office wastepaper stocks which comprises: a) converting the wastepaper to a pulp, b) contacting the pulp with an aqueous medium of alkaline pH containing between 0.05 and 2 percent by weight, calculated on a dry weight basis of the pulp, of a deinking agent comprising a first component comprising at least one ethylene oxide adduct of a detergent-range alcohol having in the range of from 8 to 20 carbon atoms and an average of from 3 to 20 oxyethylene units per molecule of alcohol, a second component selected from the group consisting of one or more detergent-range olefins having from 8 to 22 carbon atoms, one or more saturated hydrocarbons having from 8 to 20 carbon atoms, and mixtures thereof and optionally a third component comprising a detergent-range alcohol having from 8 to 20 carbon atoms, and c) treating the resulting pulp-containing medium by washing or flotation to remove suspended ink therefrom.
机译:本发明涉及用于办公室废纸原料脱墨的方法,该方法包括:a)将废纸转化成纸浆,b)使纸浆与碱性pH的水性介质接触,该碱性pH值以干计算为0.05-2重量%。以纸浆的重量为基准,包含第一组分的脱墨剂,该第一组分包括至少一个每分子8至20个碳原子和平均3至20个氧化乙烯单元的去污剂级醇的环氧乙烷加合物醇,第二组分,其选自一种或多种具有8至22个碳原子的去污剂范围的烯烃,一种或多种具有8至20个碳原子的饱和烃,及其混合物,以及任选地包含具有8至20个碳原子的洗涤剂范围的醇,和c)通过洗涤或浮选处理所得的含纸浆介质以从中除去悬浮的油墨。

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