Separation of phenol from aqueous solution by pervaporation using HTPB-based polyurethaneurea membrane

The synthesis of polypropylene glycol based polyethers and their use in membranes for the membrane aromatic recovery system (MARS)

“…Membrane solvent based extraction [18] Celgard 2400 25 22.0 -Membrane extraction/SLM [17] Celgard 2400 25 60 -Pervaporation [29] Poly butadiene based polyurethaneurea 150 -0.05 Membrane based solvent extraction [27] Polysulphone hollow fibres 290 5.5 -Pervaporation [30] PEBAX-4033 (block copolymer polyether-polyamide) 80 -3.6 a , 0.3 b Membrane extraction/SLM [28] Celgard 2402 50 -0.9 MARS process [4] Tubular silicone rubber 500 1. centration of sodium ion reaches a steady value of ∼30 ppm, and the scatter of the data thereafter is within the range of the analytical error. The ions in the aqueous solution constantly keep on associating and dissociating.…”

“…However, the commercial practicality of membrane extraction processes based on microporous [18,27] or supported liquid membranes [17,28] is low due to the lack of long term stability of the membranes [27]. Pervaporation [29,30] processes avoid the membrane instability problem by using non-porous membranes. However, due to its dependence on liquid-gas phase transitions, pervaporation is an energy intensive technique among the membrane processes [20], and industrial application is still limited due to low driving forces and cost and practicalities associated with the production of very high vacuum for recovery of low volatility aromatic acids and bases (e.g.…”

Characterization and Pervaporation Properties of Modified PU Membranes

“…Many researches have used PU membrane to separate phenolic compounds from water and found the very high selectivity of PU to phenol. Gutpa [2,3] used PU membranes to separate phenol from water and adjusted different NCO/OH ratio to obtain crosslinked material. As a result, the high separation factor over 1000 was obtained at 60 °C, but the total flux was very limited (less than 10g/m 2 h).…”

Preparation, Characterization and Separation Performances of Novel Dual Modified PU Membranes with Carbon Fiber Filling

“…Recently, PU has found its application in PV separation for the versatile segmented structures (12), which will facilitate the researching of relationship between structure and property. PU membranes have been used to remove Nmethyl-2-pyrrolidone (13), phenol (14), ethyl acetate (15) and furfural (16) from aqueous solutions. Gupta (14,17) prepared HTPB-based PU membranes.…”