PRODUCTION OF INDENE DERIVATIVE
    1.
    发明专利

    公开(公告)号:JPH10101590A

    公开(公告)日:1998-04-21

    申请号:JP23200997

    申请日:1997-08-28

    Applicant: BASF AG

    Abstract: PROBLEM TO BE SOLVED: To make it possible to simply obtain the subject compound useful as a precursor for a polymerization catalyst without using a toxic reactant, by reacting a specific aromatic compound with a specified substituted allyl compound and then dehydrogenating the resultant compound. SOLUTION: (A) A compound represented by formula I [A is a bridge, together with the adjacent carbon, forms an aliphatic aromatic ring which may be condensed with a 6-membered (hetero)aromatic ring or other aromatic rings] is reacted with (B) a compound represented by formula II [R is a 1-10C alkyl or a (1-4C alkyl-substituted)phenyl; X is Cl, Br or I] in the presence of (C) a Friedel-Crafts catalyst such as AlCl3 to provide a compound represented by formula III, which is then dehydrogenated to afford a compound represented by formula IV. Furthermore, the reaction is carried out by using the component C in an amount so as to provide (0.1:1) to (1.5:1), advantageously (0.2:1) to (1.0:1) molar ratio of the components C:B.

    7.
    发明专利
    未知

    公开(公告)号:DE4231749A1

    公开(公告)日:1994-03-24

    申请号:DE4231749

    申请日:1992-09-23

    Applicant: BASF AG

    Abstract: Process for the preparation of a supported catalyst for the polymerisation of alpha -olefins, in which (1) a support gel containing silicon dioxide is prepared by (1.1) introducing a sodium or potassium waterglass solution into a rotating stream of an aqueous mineral acid both longitudinally and tangentially to the stream, spraying the silicic acid hydrosol thus formed in droplet form into a gaseous medium, allowing it to solidify into a hydrogel and freeing the hydrogel thus obtained of salt by washing without prior aging, (1.2) drying the hydrogel resulting from (1.1) to form the support gel, and (2) the support gel (1) is loaded with chromium trioxide or a chromium compound which can be converted into chromium trioxide under the conditions of the process step (3), which results in a chromium-containing support gel, and (3) the chromium-containing support gel (2) is heated in an anhydrous gas stream containing oxygen in a concentration of over 10% by volume for from 10 to 1000 minutes at from 400 to 1100 DEG C, the hydrogel resulting from the process step (1.1) being dried in the process step (1.2) over a time of not more than 60 seconds in a shaping flash dryer at an inlet temperature of from 80 to 400 DEG C .

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