公开(公告)号：US09675941B2

公开(公告)日：2017-06-13

申请号：US14699462

申请日：2015-04-29

申请人： INSTITUTO MEXICANO DEL PETROLEO

发明人： Diego Javier Guzman Lucero ,  Javier Guzman Pantoja ,  Jorge Froylan Palomeque Santiago

IPC分类号： B01D71/64 ,  B01D53/22 ,  B01D69/06 ,  B01D67/00 ,  C08J5/18 ,  C08G73/10

CPC分类号： B01D71/64 ,  B01D53/228 ,  B01D67/0009 ,  B01D69/06 ,  B01D2256/10 ,  B01D2256/12 ,  B01D2256/16 ,  B01D2256/18 ,  B01D2256/24 ,  B01D2256/245 ,  B01D2257/102 ,  B01D2257/502 ,  B01D2257/504 ,  B01D2325/20 ,  B01D2325/34 ,  C08G73/1039 ,  C08G73/1053 ,  C08G73/1064 ,  C08G73/1067 ,  C08G73/1071 ,  C08J5/18 ,  C08J2379/08 ,  Y02C10/10 ,  Y02P20/152

摘要： The present invention relates to the synthesis of linear aromatic polyimides and the production of membranes for the separation of gases. Specifically, polyimides featuring in their chemical structure, in the part derived from a diamine, 4-fluoro-4′,4″-diaminotriphenylmethane, and an aromatic dianhydride derived from tetracarboxylic acid. Polyimides are soluble in amidic solvents such as N,N′-dimethylformamide, N,N′-dimethylacetamide, N-methyl-2-pyrrolidone, etc., which are processed as dense membranes by controlled evaporation of the solvent. The resulting membranes are capable of separating at least a gaseous mixture constituted by two components such as H2/CH4, He/N2, H2/CO2, O2/N2, CO2/CH4 and CO2/N2.