公开(公告)号：JPH01148187A

公开(公告)日：1989-06-09

申请号：JP27633588

申请日：1988-11-02

Applicant: BASF AG

Inventor： DEIITAA URUBAN ,  UORUFUGANGU RAADONAA ,  AKUSERU PAURU

IPC: C12N11/08 ,  C12P41/00

公开(公告)号：JPH0242983A

公开(公告)日：1990-02-13

申请号：JP14320589

申请日：1989-06-07

Applicant: BASF AG

Inventor： DEIITAA URUBAN ,  UORUFUGANGU RAADONAA ,  AKUSERU PAURU ,  AKUSERU ZANNAA

IPC: C12N11/08 ,  C12P17/02 ,  C12P41/00

公开(公告)号：JPS6368609A

公开(公告)日：1988-03-28

申请号：JP21153187

申请日：1987-08-27

Applicant: BASF AG

Inventor： AKUSERU ZANNAA ,  DEIITAA URUBAN

IPC: B01D15/00 ,  C08F6/00 ,  C08F6/10 ,  C08F26/10

Abstract: Vinylpyrrolidone is removed from its polymers by a process in which an aqueous or alcoholic solution of the polymer is treated with an adsorbent, the adsorbents used preferably being active carbon, zeolites and especially acidic ion exchangers.