47.
    发明专利
    未知

    公开(公告)号:SE354012B

    公开(公告)日:1973-02-26

    申请号:SE711368

    申请日:1968-05-28

    Applicant: CIBA GEIGY AG

    Abstract: 1,221,582. Papermaking. CIBA Ltd. 27 May, 1968 [16 June, 1967], No. 25256/68. Heading D2A. [Also. in Divisions A5, C2 and C5] Diphenyl ketones of the general formula wherein X is a hydrogen atom or an alkyl, hydroxyalkyl, haloalkyl, alkenyl, phenylalkyl optionally substituted in the phenyl nucleus by an alkyl or alkoxy group or a halogen atom, -(CnH 2n O) m CnH 2n Y or -OC-R radical, in which Y is a hydroxyl group or a halogen atom, m is an integer, n is 2 or 3 and R is an alkyl, alkenyl, hydroxyalkyl or haloalkyl group or a phenyl or phenylalkyl radical optionally substituted in the phenyl nucleus by an alkyl or alkoxy group or a halogen atom, may be used as preservatives in the cellulose and paper industries, e.g. for preventing the known formation of slime, due to microorganisms, in paper-making machines.

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