首页> 外国专利> Use of surface-active agents in the impurity removal process from solutions containing acetic derivatives using nano-filtration with membranes, in a process to obtain cellulose acetate

Use of surface-active agents in the impurity removal process from solutions containing acetic derivatives using nano-filtration with membranes, in a process to obtain cellulose acetate

机译:在使用醋酸纤维素膜进行纳滤的过程中,将表面活性剂用于含乙酸衍生物溶液的杂质去除工艺中

摘要

This invention refers to the use of surface-active agents as a treatment of effluents containing acetic derivatives by tangential filtration characterized from aqueous solutions containing between 20 and 35% in weight of acetic derivatives having been optionally decanted and filtered in a conventional manner in order to remove suspended impurities, which undergo the addition of one or more surface-active agents, while submitted to the tangential filtration process via polymer membranes, the cutting range of which may vary between 0.001 and 0.005 microns and feed pressure which may vary between approximately 1 and 50 barg, being that at least one of the surface-active agents present a component chosen from the lignosulfonates containing a monomeric unit indicated by the formula: embedded image
机译:本发明涉及通过切向过滤将表面活性剂用于含有乙酸衍生物的废水的处理,其特征在于,以常规方式任选将含有20-35重量%乙酸衍生物的水溶液以常规方式manner析和过滤,以便除去添加了一种或多种表面活性剂的悬浮杂质,同时通过聚合物膜进行切向过滤工艺,该聚合物膜的切割范围可在0.001至0.005微米之间变化,进料压力可在约1至15,000之间变化50 barg,因为至少一种表面活性剂具有选自木质素磺酸盐的成分,其中木质素磺酸盐包含下式表示的单体单元: “

著录项

  • 公开/公告号US6673245B2

    专利类型

  • 公开/公告日2004-01-06

    原文格式PDF

  • 申请/专利权人 RHODIA ACETOW BRASIL LTDA;

    申请/专利号US20020046906

  • 发明设计人 ROBERTO NASSER JR.;AIRES IACOVONE;

    申请日2002-01-17

  • 分类号B01D610/00;

  • 国家 US

  • 入库时间 2022-08-21 23:12:36

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