| 摘要 |
A process for dewatering lime mud in a kraft pulping process is described. T he process includes an improvement which comprises adding an effective amount o f an alkyleneamine to the lime mud prior to filtration. The preferred alkyleneamine is ethyleneamine, that is, an amine having at least one -(CR2- CR2-NH-)- unit wherein each R independently is H or an alkyl (straight, branched or cyclic) group of from 1 to 10 carbon atoms. Ethyleneamines inclu de ethylenediamine, diethylenetriamine, triethylenediamine, triethylenetetramin e, tetraethylenepentamine, piperazine, aminoethylpiperazine, and ethyleneamine mixtures such as mixtures of ethyleneamine oligomers having an average molecular weight of about 200-500.
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