B - Operations – Transporting – 01 – F
Patent
B - Operations, Transporting
01
F
B01F 17/50 (2006.01) B01D 37/02 (2006.01) B01D 61/16 (2006.01) C08B 3/06 (2006.01) C08B 3/26 (2006.01)
Patent
CA 2375913
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 formula (I).
L'invention concerne l'utilisation d'agents tensioactifs pour le traitement par filtration tangentielle des effluents renfermant des dérivés acétiques, lequel procédé est caractérisé en ce qu'il consiste à utiliser des solutions aqueuses contenant de 20 à 35 % en poids de dérivés acétiques ayant éventuellement été décantées et filtrées de façon classique afin d'éliminer les impuretés en suspension, et à ajouter auxdites solutions un ou plusieurs agents tensioactifs, tout en les soumettant au procédé de filtration tangentielle au travers de membranes polymères, leur plage de coupe pouvant varier de 0,001 à 0,005 microns, et la pression d'alimentation pouvant varier de 1 à 50 barg environ, à condition que l'un des agents tensioactifs au moins renferme un composant choisi parmi des lignosulfonates contenant un motif monomère représenté par la formule (I).
Iacovone Aires
Nasser Junior Roberto
Oyen Wiggs Green & Mutala Llp
Rhodia Acetow Brasil Ltda
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