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    2.
    发明专利
    未知

    公开(公告)号：DE2403446A1

    公开(公告)日：1975-07-31

    申请号：DE2403446

    申请日：1974-01-25

    Applicant: BASF AG

    Inventor： HANNEBAUM HEINZ ,  NOHE HEINZ DIPL CHEM DR ,  MUELLER HANS-RICHARD DIPL CHEM

    IPC: C25B3/25 ,  C07D209/04

    Abstract: Indoles or carbazoles hydrogenated in the nucleus are prepared by electrochemical reduction. Indoles or tetrahydrocarbazoles are electrolysed in aqueous sulphuric acid. The catholyte containing the reaction product is circulated and passed from the electrolytic cell into a column and from the bottom of the column back into the cell. A packed column and flow densities of 1-20 A/dm are preferably used. The catholyte expediently contains 50-70 % by weight strength sulphuric acid. The process products can be used as useful intermediates for dyestuff production.

    4.
    发明专利
    未知

    公开(公告)号：DE3104388A1

    公开(公告)日：1982-10-21

    申请号：DE3104388

    申请日：1981-02-07

    Applicant: BASF AG

    Inventor： TONNE PETER DIPL CHEM DR ,  MUELLER HANS-RICHARD DIPL CHEM ,  GOERTH HELMUT DIPL CHEM DR

    IPC: C07C309/40 ,  C07C67/00 ,  C07C301/00 ,  C07C303/06 ,  C07C303/22 ,  C07C143/55

    Abstract: A process for the preparation of compounds of the formula I I where R is alkyl, by sulfonation, chlorination and nitration starting from an alkylbenzene, wherein the alkylbenzene is sulfonated with from 2.5 to 3, preferably from 2.65 to 2.75, moles of concentrated sulfuric acid per mole of alkylbenzene, the reaction product is then reacted with from about 1.1 to 1.3 moles of chlorine in the absence of a catalyst, the product is subsequently nitrated with highly concentrated nitric acid at elevated temperatures and the nitro compound is isolated.

    Flame retardant prodn. in hexa-bromo-cyclododecane mfr. - by treating mother liquor with alkali and distn. of volatiles
    6.
    发明专利
    Flame retardant prodn. in hexa-bromo-cyclododecane mfr. - by treating mother liquor with alkali and distn. of volatiles 未知

    公开(公告)号：DE2512454A1

    公开(公告)日：1976-10-07

    申请号：DE2512454

    申请日：1975-03-21

    Applicant: BASF AG

    Inventor： MUELLER HANS-RICHARD DIPL CHEM

    IPC: C07C17/02 ,  C09K21/08 ,  C09K3/28 ,  C08K5/02

    Abstract: In flame retardant prods. by reacting cyclododeca-1,5,9-triene (I), dissolved in a 1-4C alkanol (II) in a (I): (II) wt. ratio of 1:2-20, with Br2 in a (I):Br2 molar ratio of 1:2.5-4 at -20 to +25 degrees C and isolating the 2 phases from the prod., consisting of a solid phase of hexabromocyclododecane (III) and a liquid phase of mother liquor (IV), (1) 100 (wt.)pts. (IV) are mixed with 1-25 pts. 5-50% aq. alkali soln. and mixing is continued for 1-8 h at 20-120 degrees C; (2) the prod. is opt. mixed with 5-50 pts. H2O; (3) the organic phase is isolated from the prod. from (1) or (2), consisting of a liquid aq. and a liquid organic phase; and (4) the volatiles are distilled from the organic phase until volatiles no longer distil at 0.001-0.1 bar and 30-110 degrees C; and (5) if desired, the prod. from (4) is washed with 0.2-2 times its wt. of water and the volatiles are distilled from the resultant organic phase as in (4). Used for flameproofing elastomers, polyurethane plastics or paper prods. The flame retardant is a clear, viscous, chemically inert, almost odourless and non-volatile liquid with good flame retardant action. The mother liquor from the process can be converted to a non-polluting prod., e.g. by combustion.

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