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公开(公告)号：US3639659A
公开(公告)日：1972-02-01
申请号：US3639659D
申请日：1969-03-28
Applicant: BASF AG
Inventor： NIESWANDT WERNER , LINGE HERMANN , PIRZER HANS , HOERAUF WERNER , HETZ HERBERT
CPC classification number: C08G69/46
Abstract: PROCESS FOR THE CONTINUOUS EXTRACTION OF LOW MOLECULAR WEIGHT CONSTITUENTS FROM GRANULAR POLYAMIDES IN AN EXTRACTION ZONE IN WHOSE UPPER PART THE EXTRACTANT IS RECYCLED.
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