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A purifier for removing metal, such as chromium, from an organic solvent is disclosed. The purifier comprises a housing having a fluid inlet and a fluid outlet in fluid communication with the fluid inlet; a volume of ion-exchange resin disposed within the housing downstream of the fluid inlet; and a

A purifier for removing metal, such as chromium, from an organic solvent is disclosed. The purifier comprises a housing having a fluid inlet and a fluid outlet in fluid communication with the fluid inlet; a volume of ion-exchange resin disposed within the housing downstream of the fluid inlet; and a filtration member downstream of the volume of ion-exchange resin, the filtration member comprising at least one microporous membrane having a substantially neutral surface and a microporous polytetrafluoroethylene membrane downstream of the at least one microporous membrane. A method for removing metal, including chromium, from an organic solvent using a purifier of the invention is also disclosed.

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1. A purifier for removing chromium from an organic solvent, comprising: a housing having a fluid inlet and a fluid outlet in fluid communication with the fluid inlet;a volume of ion-exchange resin disposed within the housing downstream of the fluid inlet; anda filtration member disposed downstream

1. A purifier for removing chromium from an organic solvent, comprising: a housing having a fluid inlet and a fluid outlet in fluid communication with the fluid inlet;a volume of ion-exchange resin disposed within the housing downstream of the fluid inlet; anda filtration member disposed downstream of the volume of ion-exchange resin, the filtration member comprising: at least one amide-modified microporous polytetrafluoroethylene membrane having a substantially neutral surface with an electrostatic potential of about 0; anda microporous polytetrafluoroethylene ion-exchange membrane downstream of the at least one amide-modified microporous polytetrafluoroethylene membrane,wherein the at least one amide-modified microporous polytetrafluoroethylene membrane has a pore size rating greater than the pore size rating of the microporous polytetrafluoroethylene ion-exchange membrane and less than or equal to about 10 μm;and the microporous polytetrafluoroethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 100 nanometers. 2. A purifier for removing chromium from an organic solvent, comprising: a cylindrical housing having a longitudinal axis, a fluid inlet and a fluid outlet in fluid communication with the fluid inlet;a volume of ion-exchange resin disposed within the cylindrical housing downstream of the fluid inlet; anda pleated filtration member disposed concentrically around the longitudinal axis within the cylindrical housing and downstream of the volume of ion-exchange resin, the pleated filtration member comprising: at least one amide-modified microporous polytetrafluoroethylene membrane having a substantially neutral surface with an electrostatic potential of about 0; anda microporous polytetrafluoroethylene ion-exchange membrane downstream of the at least one amide-modified microporous polytetrafluoroethylene membrane,wherein the at least one amide-modified microporous polytetrafluoroethylene membrane has a pore size rating greater than the pore size rating of the microporous polytetrafluoroethylene ion-exchange membrane and less than or equal to about 10 μm; and the microporous polytetrafluoroethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 100 nanometers. 3. The purifier of claim 1, wherein a surface of the microporous polytetrafluoroethylene ion-exchange membrane is modified with sulfonic acid. 4. The purifier of claim 1, wherein the microporous polytetrafluoroethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 50 nanometers. 5. The purifier of claim 4, wherein the microporous polytetrafluoroethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 25 nanometers. 6. The purifier of claim 1, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are bonded to one another in the filtration member. 7. The purifier of claim 1, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are disposed adjacent to one another in the filtration member. 8. The purifier of claim 1, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are each pleated. 9. The purifier of claim 1, further comprising an ion-exchange resin vessel that contains the volume of ion-exchange resin. 10. The purifier of claim 9, wherein the ion-exchange resin vessel comprises a net material or frit. 11. The purifier of claim 1, further comprising a liquid distributor downstream of the volume of ion-exchange resin and upstream of the filtration member. 12. The purifier of claim 1, wherein the organic solvent is an alcohol. 13. The purifier of claim 12, wherein the alcohol is isopropanol. 14. The purifier of claim 1, wherein the filtration member comprises at least three amide-modified microporous polytetrafluoroethylene membranes, each having a substantially neutral surface, and the microporous polytetrafluoroethylene ion-exchange membrane is downstream of the at least three amide-modified microporous membranes. 15. A purifier for removing chromium from an organic solvent, comprising: a cylindrical housing having a longitudinal axis, a fluid inlet and a fluid outlet in fluid communication with the fluid inlet;a volume of ion-exchange resin disposed within the cylindrical housing downstream of the fluid inlet; anda pleated filtration member disposed concentrically around the longitudinal axis within the cylindrical housing and downstream of the volume of ion-exchange resin, the pleated filtration member comprising: at least three amide-modified microporous membranes, each having a substantially neutral surface with an electrostatic potential of about 0; anda microporous polytetrafluoroethylene ion-exchange membrane downstream of the at least three amide-modified microporous membranes,wherein each amide-modified microporous membrane is a microporous polytetrafluoroethylene membrane modified with amide and has a pore size rating greater than the pore size rating of the microporous polytetrafluoroethylene ion-exchange membrane and less than or equal to about 10 μ; and the microporous polytetrafluoroethylene ion-exchange membrane has a surface modified with sulfonic acid and a pore size rating of about 1 nanometer to about 25 nanometers. 16. A method for removing chromium from an organic solvent, the method comprising: providing a flow of an organic solvent comprising chromium andpassing the flow of the organic solvent through a purifier to thereby remove chromium from the organic solvent, the purifier comprising:a housing having a fluid inlet and a fluid outlet in fluid communication with the fluid inlet;a volume of ion-exchange resin disposed within the housing downstream of the fluid inlet; anda filtration member disposed downstream of the volume of ion-exchange resin, the filtration member comprising: at least one amide-modified microporous polytetrafluoroethylene membrane having a substantially neutral surface with an electrostatic potential of about 0; anda microporous polytetrafluoroethylene ion-exchange membrane downstream of the at least one amide-modified microporous polytetrafluoroethylene membrane,wherein the at least one amide-modified microporous polytetrafluoroethylene membrane has a pore size rating greater than the pore size rating of the microporous polytetrafluoroethylene ion-exchange membrane and less than or equal to about 10 μm; and the microporous polytetrafluoroethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 100 nanometers. 17. The purifier of claim 2, wherein a surface of the microporous polytetrafluoroethylene ion-exchange membrane is modified with sulfonic acid. 18. The purifier of claim 2, wherein the microporous polytetrafluorethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 50 nanometers. 19. The purifier of claim 18, wherein the microporous polytetrafluorethylene ion-exchange membrane has a pore size rating by bubble point of about 1 nanometer to about 25 nanometers. 20. The purifier of claim 2, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are bonded to one another in the filtration member. 21. The purifier of claim 2, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are disposed adjacent to one another in the filtration member. 22. The purifier of claim 2, wherein the at least one amide-modified microporous membrane having a substantially neutral surface and the microporous polytetrafluoroethylene ion-exchange membrane are each pleated. 23. The purifier of claim 2, further comprising an ion-exchange resin vessel that contains the volume of ion-exchange resin. 24. The purifier of claim 23, wherein the ion-exchange resin vessel comprises a net material or frit. 25. The purifier of claim 2, further comprising a liquid distributor downstream of the volume of ion-exchange resin and upstream of the filtration member. 26. The purifier of claim 2, wherein the organic solvent is an alcohol. 27. The purifier of claim 26, wherein the alcohol is isopropanol. 28. The purifier of claim 2, wherein the filtration member comprises at least three microporous amide-modified membranes, each having a substantially neutral surface, and the microporous polytetrafluoroethylene ion-exchange membrane is downstream of the at least three amide-modified microporous membranes.