4. Conclusions
A novel process to recover high purity phenol crystals from dilute aqueous solutions by pervaporation was proposed. It is
based on two stages of condensation of the permeate vapor. At a feed phenol concentration of 6000 ppm, phenol crystals were recovered at a rate of 123 g/(m2 h), which represented 80% of the total amount of phenol permeated through the membrane. With increasing the feed phenol concentration from 6000 to 10,000 ppm, the recovery of phenol crystals in the first trap will increase to nearly 90%, while the phenol concentration in the solution collected in the second trap was essentially the same (i.e.,18,000 ppm). The proposed PVCC process mode could also be used for separation and recovery of other organic pollutants from industrial wastewater streams, which is of significant interest from an environmental perspective.
4. Conclusions
A novel process to recover high purity phenol crystals from dilute aqueous solutions by pervaporation was proposed. It is
based on two stages of condensation of the permeate vapor. At a feed phenol concentration of 6000 ppm, phenol crystals were recovered at a rate of 123 g/(m2 h), which represented 80% of the total amount of phenol permeated through the membrane. With increasing the feed phenol concentration from 6000 to 10,000 ppm, the recovery of phenol crystals in the first trap will increase to nearly 90%, while the phenol concentration in the solution collected in the second trap was essentially the same (i.e.,18,000 ppm). The proposed PVCC process mode could also be used for separation and recovery of other organic pollutants from industrial wastewater streams, which is of significant interest from an environmental perspective.
การแปล กรุณารอสักครู่..
