44.
    发明专利
    未知

    公开(公告)号:DE3914379A1

    公开(公告)日:1991-01-17

    申请号:DE3914379

    申请日:1989-04-29

    Applicant: BASF AG

    Abstract: 3-Aminophenylpentane-1,5-diones of the formula I (I) where R1 and R2 are, independently of one another, hydrogen, C1-C8-alkyl, C4-C8-cycloalkyl, cyano-C2-C4-alkyl, hydroxy-C2-C4-alkyl, chloro-C2-C4-alkyl, phenyl-C1-C2-alkyl which can be substituted by chlorine, or phenyl which can be substituted by clorine or methyl, or R1 and R2 form, together with the nitrogen to which they are bonded, a heterocyclic radical which can contain further hetero atoms, R3 is hydrogen, fluorine, chlorine, C1-C2-alkyl or C2-C5-alkoxy or, if R3 is ortho to -NRR2, R3 and R2 together form C2-C4-alkylene, which can be substituted, or 1,2-phenylene and A is naphthyl or a radical of the formula II (II) where X is hydrogen, fluorine, chlorine, bromine, C1-C5-alkyl, hydroxyl, C1-C5-alkoxy, phenoxy, phenyl-C1-C2-alkoxy, cyano or phenyl and n is 1 or 2, with the proviso that R1 and R2 are not both methyl when A is phenyl, are described.

    47.
    发明专利
    未知

    公开(公告)号:DE3703837A1

    公开(公告)日:1988-08-18

    申请号:DE3703837

    申请日:1987-02-07

    Applicant: BASF AG

    Abstract: Oxidizable for organic and/or inorganic compounds in waters are subjected to catalytic degradation using a catalyst applied to an oxygen-storing inert carrier, for example of graphite, coke, a non-gassing coal or active carbon. The carrier used is coated with a cationic dye complexed with heteropolyacids and/or polyacids and/or salts or metal acids of subgroups V to VIII. The advantages of the process include the prevention of biological growth on the catalyst surface by the biocidal dye cation and the avoidance of calcium and magnesium deposits on the catalyst surface through the presence of the cationic solid.

    48.
    发明专利
    未知

    公开(公告)号:DE3628354A1

    公开(公告)日:1988-02-25

    申请号:DE3628354

    申请日:1986-08-21

    Applicant: BASF AG

    Abstract: A process for the preparation of a water soluble food-grade diaminotriphenylmethane colorant containing from 2 to 4 sulfo groups, comprising anodically oxidizing the corresponding leuco compound in an electrolysis cell divided into an anode space and a cathode space in the presence of from 0.01 to 2% by weight, based on the solution being oxidized, of a C2-C4-alkanol, urea, a urea derivative or a mixture thereof, at a potential epsilon h

    50.
    发明专利
    未知

    公开(公告)号:DE3425631A1

    公开(公告)日:1986-01-16

    申请号:DE3425631

    申请日:1984-07-12

    Applicant: BASF AG

    Abstract: Novel compounds of the general formula I I where A(-) is an anion, R is hydrogen or unsubstituted or substituted alkyl or cycloalkyl, R1 and R2 independently of one another are each hydrogen or unsubstituted or substituted alkyl or cycloalkyl, or one of the radicals may furthermore be aryl, or R1 and R2, together with the nitrogen atom, form a saturated heterocyclic structure, the radicals R3 independently of one another are each hydrogen or C1-C4-alkyl, R4 and R5 independently of one another are each unsubstituted or substituted alkyl or cycloalkyl, or one of the radicals may furthermore be hydrogen, aryl or hetaryl, R4 and R5, together with the nitrogen atom, form a saturated heterocyclic structure, n is 1, 2 or 3, X is hydrogen, chlorine, bromine, C1-C4-alkyl, C1-C4-alkoxy or nitro and Y is hydrogen or chlorine, are particularly useful for dyeing paper stocks.

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