公开(公告)号：US3705885A

公开(公告)日：1972-12-12

申请号：US3705885D

申请日：1969-12-02

申请人： STANDARD OIL CO

发明人： HOLLSTEIN ELMER J ,  HALL LEWIS W JR

IPC分类号： C08F6/04 ,  C08F15/00 ,  C08F1/94 ,  C08F3/02

CPC分类号： C08F6/04

摘要： A PROCESS FOR THE SEPARATION OF ALPHA-OLEFIN POLYMERS HAVING DIFFERENT STERIC STRUCTURES WHICH COMPRISES ADJUSTING THE CONCENTRATION OF A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREO-REGULAR CRYSTALLINE POLYMER AND SEMICRYSTALLINE STEREOBLOCK POLYMER TO 10-40 WEIGHT PERCENT OF POLYMER, CENTRIFUGING AND RECOVERING A SUBSTANTIALLY PURE STEREOREGULAR POLYMER, AND A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREOBLOCK POLYMER, ADJUSTING, IF NECESSARY, THE CONCENTRATION OF THE LATTER SOLUTION TO 5-15 WEIGHT PERCENT POLYMER, FILTERING THE SOLUTION TO RECOVER SUBSTANTIALLY PURE STEREOBLOCK POLYMER, AND A FILRATE CONTAINING AMORPHOUS POLYMER, AND RECOVERING SUBSTANTIALLY PURE AMORPHOUS POLYMER FROM THE FILTRATE.