公开(公告)号：US3567810A

公开(公告)日：1971-03-02

申请号：US3567810D

申请日：1968-04-01

申请人： AMICON CORP

发明人： BAKER RICHARD W

IPC分类号： B01D67/00 ,  B01D71/68 ,  B29D7/01 ,  B29D27/04

CPC分类号： B01D67/0013 ,  B01D71/68 ,  B29D7/01

摘要： THIS INVENTION RELATES TO A NOVEL PROCESS FOR FORMING IMPORVED POLYMERIC ANISOTROPIC MEMBRANES COMPRISING THE ADDITIONAL STEP OF SUBJECTING A CAST POLYMER FILM SUITABLE FOR FORMATION OF SUCH AN ANISOTROPIC MEMBRANE TO AN EVAPORATION STEP PRIOR TO PRECIPITATION OF THE MEMBRANE, SAID EVAPORATIVE STEP CONTROLLED TO SELECTIVELY EVAPORATE SOLVENT FROM THE SURFACE OF SAID FILM AND THEREBY SELECTIVELY INCREASE THE POLYMER CONCENTRATION AT THE SURFACE OF SAID FILM. THE IMPROVED MEMBRANES FORMED BY THE PROCESS OF THE INSTANT INVENTION ARE CHARACTERIZED BY IMPROVED REJECTION CHARACTERISTICS WHILE RETAINING LIQUID FLUX CHARACTERISTICS WHICH ARE SURPRISINGLY HIGH IN VIEW OF THE REJECTION CHARACTERISTICS.

公开(公告)号：US3526588A

公开(公告)日：1970-09-01

申请号：US3526588D

申请日：1967-09-21

申请人： AMICON CORP

发明人： MICHAELS ALAN S ,  BAKER RICHARD W

IPC分类号： B01D61/00 ,  B01D71/28 ,  C08F6/04 ,  C08J5/00 ,  C08J5/18 ,  C08L69/00 ,  C25B13/04 ,  B01D13/00

CPC分类号： B01D61/025 ,  C08F6/04

公开(公告)号：US3541005A

公开(公告)日：1970-11-17

申请号：US3541005D

申请日：1969-02-05

申请人： AMICON CORP

发明人： STRATHMANN HEINRICH ,  BAKER RICHARD W

IPC分类号： B01D61/02 ,  B01D20060101 ,  B01D61/14 ,  B01D61/18 ,  B01D65/02 ,  B01D65/08 ,  B01D13/00

CPC分类号： B01D61/145 ,  B01D61/18