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    2.
    发明专利
    未知

    公开(公告)号：ITMI952023A1

    公开(公告)日：1997-04-04

    申请号：ITMI952023

    申请日：1995-10-04

    Applicant: BASF AG

    Inventor： HAGEMEYER ALFRED ,  WATZENBERGER OTTO ,  DEIMLING AXEL

    IPC: B01J23/08 ,  B01J23/10 ,  B01J23/14 ,  B01J23/48 ,  B01J23/70 ,  B01J38/12 ,  C07B35/04 ,  C07B61/00 ,  C07C5/42 ,  C07C11/02 ,  C07C15/46

    Abstract: A regenerative process for the preparation of olefinically unsaturated compounds by oxidation/dehydrogenation of selectively oxidizable hydrocarbons over an oxygen carrier acting as catalyst, in the absence of molecular oxygen, alternating (in repeated cycles) with regeneration of the spent oxygen carrier with a gaseous molecular oxidizing agent, in which the spent (reduced) catalyst is cooled, prior to introduction of the regenerating gas, to a temperature which is below the temperature of the reaction, regeneration being controlled in such a manner that the highest temperature occurring during regeneration does not exceed the temperature of reaction at which dehydrogenation is commenced.

    3.
    发明专利
    未知

    公开(公告)号：ITMI952022A1

    公开(公告)日：1997-04-04

    申请号：ITMI952022

    申请日：1995-10-04

    Applicant: BASF AG

    Inventor： HAGEMEYER ALFRED ,  LAUTENSACK THOMAS ,  WATZENBERGER OTTO ,  DEIMLING AXEL

    IPC: C07B31/00 ,  C07B35/04 ,  C07B61/00 ,  C07C2/84 ,  C07C5/333 ,  C07C5/42 ,  C07C11/02 ,  C07C15/44 ,  C07C45/28 ,  C07C45/65 ,  C07C51/377 ,  C07C57/055 ,  C07C67/39 ,  C07C253/26

    Abstract: A process for the preparation of olefinically unsaturated compounds by catalytic oxidation, ie oxidative dehydrogenation by transferring oxygen from a previously oxidized oxygen carrier acting as catalyst, in the absence of molecular oxygen, the catalyst being regenerated after exhaustion, wherein, during the operating phase of the catalyst (oxidation/dehydration partial step), the residence time, space velocity and/or temperature of the reactants in the reactor is/are adjusted, ie, controlled, continuously or in discrete steps, in a manner appropiate to the momentary state of activity of the redox catalyst by adjusting-continuously or stepwise-the residence time of the reactants in the freshly regenerated catalyst (ie at the commencement of the reaction) to a shorter time, and/or the temperature to a lower value, than the corresponding parameter(s) in the partially reduced catalyst.

    6.
    发明专利
    未知

    公开(公告)号：DE59507974D1

    公开(公告)日：2000-04-13

    申请号：DE59507974

    申请日：1995-12-12

    Applicant: BASF AG

    Inventor： POEPEL JUERGEN ,  HAGEMEYER ALFRED ,  BUECHELE WOLFGANG ,  DEIMLING AXEL ,  HOFFMANN WOLFGANG

    IPC: B01J23/648 ,  C07C5/42 ,  C07C15/46

    Abstract: PCT No. PCT/EP95/04895 Sec. 371 Date Jun. 18, 1997 Sec. 102(e) Date Jun. 18, 1997 PCT Filed Dec. 12, 1995 PCT Pub. No. WO96/20149 PCT Pub. Date Jul. 4, 1996In a process for preparing olefinically unsaturated compounds such as styrene by oxidative dehydrogenation of corresponding hydrocarbons using a previously oxidized oxygen transferer acting as catalyst in the absence of molecular oxygen and reoxidation of the oxygen transferer in at least two reactors, the dehydrogenation and regeneration takes place alternately in time in the two reactors and the reactors are connected to one another in terms of heat via heat exchangers and a common circuit for heat transfer medium.

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