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    • 9. 发明授权
    • Method for recovery of polymers
    • 聚合物回收方法
    • US5575918A
    • 1996-11-19
    • US395774
    • 1995-02-28
    • Michael J. VirnigPhillip L. MattisonKeith E. Weerts
    • Michael J. VirnigPhillip L. MattisonKeith E. Weerts
    • B01D61/02C02F1/26B01D61/00B01D11/00B01D15/04
    • B01D61/027C02F1/26
    • A process for the separation of naphthalenesulfonate-based carbonyl condensates from water is provided. The process comprises contacting a mixture comprised of water and a naphthalenesulfonate-based carbonyl condensate (preferably a material selected from the group consisting of formaldehyde condensates of naphthalenesulfonic acids, formaldehyde condensates of lower-alkyl substituted naphthalenesulfonic acids, and mixtures of two or more of such materials) with a liquid organic phase comprised of a lipophilic non-quaternary amine to form an aqueous phase depleted with respect to said mixture of naphthalenesulfonate-based carbonyl condensate and a liquid organic phase enriched in naphthalenesulfonate-based carbonyl condensate. The process further comprises separating said aqueous phase depleted with respect to said mixture of naphthalenesulfonate-based carbonyl condensate and said liquid organic phase enriched with respect to naphthalenesulfonate-based carbonyl condensate. The process further comprises stripping the enriched liquid organic phase by contacting with an alkaline stripping solution to regenerate the cationic lipophilic amine, recycling the alkaline stripping solution for contacting with a further portion of enriched liquid organic phase. The alkaline stripping solution may then be treated by nanofiltration to separate inorganic salts from the polymeric naphthalenesulfonate-based carbonyl condensate.
    • 提供了一种从水中分离萘磺酸盐基羰基缩合物的方法。 该方法包括将由水和萘磺酸盐基羰基缩合物组成的混合物(优选选自萘磺酸的甲醛缩合物,低级烷基取代的萘磺酸的甲醛缩合物,以及两种或更多种 材料),其中液体有机相由亲脂性非季胺组成,以形成相对于所述萘磺酸盐基羰基缩合物的混合物和富含萘磺酸盐的羰基缩合物的液体有机相贫化的水相。 该方法还包括相对于所述萘磺酸盐基羰基缩合物的混合物和相对于萘磺酸盐羰基缩合物富集的所述液体有机相而分离所述水相。 该方法还包括通过与碱性剥离溶液接触以再生阳离子亲脂胺来汽提富集的液体有机相,再循环碱性剥离溶液以与富集的液体有机相的另一部分接触。 然后可以通过纳滤来处理碱性剥离溶液,以将无机盐与基于聚萘磺酸盐的羰基缩合物分离。