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Use of surfactant in the process of obtaining cellulose acetate in the process of removing impurities from solutions containing acetic acid derivatives using nanofiltration by membrane
Use of surfactant in the process of obtaining cellulose acetate in the process of removing impurities from solutions containing acetic acid derivatives using nanofiltration by membrane
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机译:在通过膜的纳滤从含乙酸衍生物的溶液中除去杂质的过程中,在获得乙酸纤维素的过程中使用表面活性剂
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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:
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