98.
    发明专利
    未知

    公开(公告)号:DE59702299D1

    公开(公告)日:2000-10-05

    申请号:DE59702299

    申请日:1997-12-09

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP97/06857 Sec. 371 Date Jan. 27, 1999 Sec. 102(e) Date Jan. 27, 1999 PCT Filed Dec. 9, 1997 PCT Pub. No. WO98/29603 PCT Pub. Date Jul. 9, 1998Paper is produced by draining a paper stock containing process chemicals on a paper machine, a main stream of the paper stock and a dilution stream which consists of white water, contains at least 5% by weight of the process chemicals and amounts to 5-35% by volume of the total head box feed being fed via a head box to the paper machine wire. The papers thus produced have an excellent formation profile and an outstanding ash distribution.

    99.
    发明专利
    未知

    公开(公告)号:DE59700901D1

    公开(公告)日:2000-01-27

    申请号:DE59700901

    申请日:1997-04-23

    Applicant: BASF AG

    Abstract: PCT No. PCT/EP97/02062 Sec. 371 Date Oct. 22, 1998 Sec. 102(e) Date Oct. 22, 1998 PCT Filed Apr. 23, 1997 PCT Pub. No. WO97/40088 PCT Pub. Date Oct. 30, 1997Process for preparing fine-particle, water-insoluble polymers of aziridines by polymerizing aziridines, preferably ethylenimine, in the presence of crosslinkers which contain at least two functional groups, and in at least one ether, and also modified, water-insoluble polymers of aziridines which can be obtained by reacting fine-particle, water-insoluble, crosslinked polymers of aziridines, in aqueous medium, with carbon disulfide or formaldehyde and a nucleophilic agent from the group consisting of alkali metal cyanides, primary amines, secondary amines, alkali metal sulfites and alkali metal phosphites, and use of the modified and non-modified fine-particle, water-insoluble polymers for immobilizing active compounds, as absorbents for aldehydes, ketones and acids, and also for removing heavy metal ions from wastewaters.

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