Organic solvent resistant nanofiltration (OSRN) membranes are different from conventional polyamide NF and RO membranes, similar to pervaporation (PV) membranes applied to separations of organic solutions.
Recycling dewaxing solvent from lubricant oil/Organic solvent recovery in acid removing process for diesel/ Treatment of effluents from fine chemical industry /Desulfurization of fuel using membrane separation/Recycling catalysts in petrochemical industry
As for all OSRN applications mentioned above, Jinzheng could provide the complete sets of solutions to the process technologies and the equipment.
Treatment of effluents from fine chemical industry
Recycling dewaxing solvent from lubricant oil had been widely applied to refineries.
Ethyl methyl ketone and toluene are separated from dewaxing filtrate using OSRN, which increases the production capacity of base oil by 25%, the recovery rate of dewaxing oil by 3%, and reduces the unit energy consumption by 20%. The investment of membrane modules could be recovered in 1 year.
Effluents from fine chemical industry are a kind of refractory wastewaters, and have the following characteristics: complex composition, high COD, high salt concentration, and containing organic solvent.
Conventional separation and recycling methods such as distillation, adsorption and extraction, etc., are of energy consumption, and cause the second pollution easily.
Effluent from fine chemical industry being treated with OSRN, the permeate could meet the production requirements, and the pollutants are concentrated, and then sent to incineration.
In petrochemical production, there are many catalyst-involved reaction processes.
A decent amount of catalyst is not consumed after reaction. Such catalysts are generally quite expensive, and there molecular weights are in the range of a few hundred Daltons. They could be separated from organic solvents using OSRN, so as to recycling catalysts and reducing production costs.