76.
    发明专利
    未知

    公开(公告)号:DE3881442D1

    公开(公告)日:1993-07-08

    申请号:DE3881442

    申请日:1988-06-24

    Applicant: BASF AG

    Abstract: Prepn. of N-heterocycles of formula (I) and (II) in which R1 and R4-R9=H, alkyl, aryl, aralkyl, alkaryl or cycloalkyl gps., and R2 and R3=alkyl, alkaryl, substd. alkyl or cycloalkyl gps. The prepn. is characterised by reaction of olefins of formula (III) and (IV) (in which R2-R9 are as above) with NH3 or a prim. amine of formula H2NR1 in which R1 is as above, in the presence of a zeolite catalyst.

    78.
    发明专利
    未知

    公开(公告)号:DE3926290A1

    公开(公告)日:1991-02-14

    申请号:DE3926290

    申请日:1989-08-09

    Applicant: BASF AG

    Abstract: A process for the preparation of mixtures of isomeric cresols with a molar ratio of para- to meta-cresol of from 0.6:1 to 10:1 by isomerization of cresol mixtures or ortho- and/or metal-cresol on zeolite catalysts of the pentasil type in the gas phase at from 300 DEG to 600 DEG C. under from 0.01 to 50 bar entails the mean particle size of the zeolite catalyst being at leat 3 mu m, and the selectivity in the established test for the disproportionation of ethylbenzene to diethylbenzene isomers being at least 60% for para-diethylbenzene.

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