Patent ID: 9375678
Filing Date: 2016-06-28
CPC Classification: B01D,Y02C

Claim Text:
1. A method of preparing a MOF-membrane-polymer, comprising: a) dip-coating a porous polymer with a seed solution comprising MOF nanocrystals of average size <1 micron suspended in a first solvent that can penetrate the porous polymer, wherein the seed solution comprises about 0.4 wt % MOF nanocrystals in the first solvent, and wherein the first solvent is selected from the group consisting of water, methanol, ethanol, propanol, butanol, chloroform, toluene, hexane, and combinations thereof, with the proviso that the first solvent does not solubilize the porous polymer; b) drying the dip-coated porous polymer; c) growing larger MOF crystals on the dip-coated porous polymer at less than 100° C. in a growth solution to make a MOF-membrane-polymer, the growth solution comprising MOF precursors solubilized in a second solvent, wherein the growth solution comprises 0.5-1.0 wt % ligand and 0.5-1.0 wt % zinc in the second solvent, and wherein the second solvent is independently selected from the group consisting of ethanol, propanol, butanol, chloroform, toluene, hexane, and combinations thereof, with the proviso that the second solvent does not solubilize the porous polymer; and d) rinsing and drying the MOF-membrane-polymer.