Membrane ultrafiltration of a nonionic surfactant

Abstract

Membrane Su rfacta ntAqueous solutions 1.65 x surfactant Triton X-100 are Ultrafiltration of a Nonionic 10-4 to 1.10 x 10-2 molar in the nonionic subjected to membrane ultrafiltration over the temperature range of 22 to 506C in a continuous flow, thin channel cell, with channel Reynolds numbers from 50 to 1175. Data for the ultrafiltrate flux through the optimum polyelectrolyte complex membrane (of the three tested) are correlated by an equation involving the in-series resistances of the membrane and of the polarized boundary layer of the surfactant rejected by the membrane, with the latter resistance varied over a wide range. The correlations are used to estimate the required membrane area and resultant ultrafiltrate concentration of surfactant to achieve any specified water recovery using cells-in-series and cells-in-parallel operation. The gelation concentration and surfactant mass transfer coefficient are used to estimate water flux in the gel-polarization region. SCOPEMembrane ultrafiltration has been used successfully to 105 to 106 N/m2 and involves the separation of modest concentrate or purify macromolecular solutes and colloidal molecular weight (500 and greater) solutes, macromoleparticulates and for the treatment of aqueous wastes. In cules, and colloids from aqueous solution, utilizing coma recent series of articles, Porter and Michaels (1971a, b, paratively-open, diffusive (or microporous) anisotropic C, d, 1972) have reviewed the applications of ultrafiltration membranes. However, severe performance limitations are in many processing areas. Ultrafiltration (in contrast to encountered during ultrafiltration due to the high-flux reverse osmosis) is carried out at low pressures of about characteristics of the membranes, which result in the

Retention of proteins in cross‐flow UF through asymmetric inorganic membranes

“…Nevertheless, it is known that for high pressures the permeability decreases until a more or less flat plateau is reached for the flux. Hence, the volume flow cannot surpass a certain upper limit (Grieves et al, 1973).…”

Ultrafiltration of Micellar Solutions in the Presence of Electrolytes

“…the point where the flux becomes zero. Note that NaNO 3 0.9 M, pH 9.5-9.6; (E) NaHCO 3 /Na 2 CO 3 1.1 M, concentration polarization is known to be responsible for NaNO 2 0.9 M, NaNO 3 0.9 M, pH 9.5-9.6. the flux decline (24)(25)(26). This phenomenon added to the adsorption of the surfactant (27-29) on the polymeric mem-…”

Membrane technology for the recovery of detergent compounds: A review

“…This method has the advantage that the permeate can be reused in the cleaning process, due to the high concentration of surfactant monomers. The first membrane process used to separate surfactants was UF at the beginning of the 1970s [18].…”

“…NF reduced the COD content by 80% at a VCR of[16][17][18][19][20][21] (better reductions at a lower VCR, e.g. 90% and 87% at VCR 6 with both membranes respectively).…”