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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
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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
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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: 展开▼