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1.发明授权Process of forming cellulosic webs containing urea-alkyleneimine condensation products 失效形成含有脲 - 亚烷基亚胺缩合产物的纤维素网的方法
公开(公告)号：US3345253A
公开(公告)日：1967-10-03
申请号：US39259364
申请日：1964-08-27
Applicant: HOECHST AG
Inventor： HERBERT BESTIAN , HANS SOMMER , DIETER BERGMANN
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2.发明授权Recovery of fibrous material from waste waters of the paper, cardboard and celluloseindustry by addition of condensation of urea and an alkyleneimine 失效通过加入尿素和亚烷基亚胺的缩合从纸，纸板和纤维素工业的废水中回收纤维材料
公开(公告)号：US3399110A
公开(公告)日：1968-08-27
申请号：US43909265
申请日：1965-03-11
Applicant: HOECHST AG
Inventor： HANS SOMMER , HERBERT BESTIAN , DIETER BERGMANN
IPC: D21F1/82
CPC classification number: D21F1/82 , Y10S162/09
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