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21.
公开(公告)号:BE1008832A6
公开(公告)日:1996-08-06
申请号:BE9500838
申请日:1995-10-11
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 , C07C5/32 , C07C15/46
Abstract: Procédé de préparation de composés à insaturation oléfinique par oxydation/déshydrogénation oxydante catalytique par transfert d'oxygène d'un agent de transfert d'oxygène préalablement oxydé, agissant à titre de catalyseur, en l'absence d'oxygène moléculaire, où le catalyseur est régénéré après épuisement, caractérisé en ce que, au cours de la phase de travail du catalyseur (étape partielle d'oxydation/déshydrogénation), la durée de séjour, la vitesse spatiale et/ou la température des participants à la réaction dans le réacteur étaient adaptées (c'est-à-dire dirigées), de manière continue ou par étapes distinctes, d'une manière correspondant à l'état d'activité momentané du catalyseur redox, en une manière telle que - uniformément ou de manière échelonnée - la durée de séjour des participants à la réaction dans le catalyseur fraîchement régénéré (c'est-à-dire au début de la réaction) était choisie plus courte ou que la vitesse spatiale était choisie plus élevée et/ou la température était choisie plus faible que dans le cas des paramètres correspondants dans le catalyseur partiellement réduit.
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公开(公告)号:ITMI941470D0
公开(公告)日:1994-07-14
申请号:ITMI941470
申请日:1994-07-14
Applicant: BASF AG
Inventor: POPEL WOLFGANG JURGEN , BUCHELE WOLFGANG , DEIMLING AXEL , PETERSEN HERMANN
IPC: B01J23/847 , B01J23/888 , C07C5/333 , C07C
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公开(公告)号:AU3250899A
公开(公告)日:1999-08-23
申请号:AU3250899
申请日:1999-01-26
Applicant: BASF AG
Inventor: FISCHER WOLFGANG , BUCHNER EUGEN-WALTER , DEIMLING AXEL , GAUSEPOHL HERMANN , SCHADE CHRISTIAN
IPC: B01J19/18 , C08F2/00 , C08F279/02 , C08F287/00
Abstract: A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream process. The heat of polymerization is utilized to remove the solvent for the rubber, this solvent having a boiling point lower than those of styrene and ethylbenzene, from at least one of the polymerization reactors via distillation with distillative cooling, and the solvent is reintroduced into the process of rubber preparation.
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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.
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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.
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公开(公告)号:FR2725716A1
公开(公告)日:1996-04-19
申请号:FR9512029
申请日:1995-10-13
Applicant: BASF AG
Inventor: HAGEMEYER ALFRED , WATZENBERGER OTTO , DEIMLING AXEL
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公开(公告)号:NL1001349A1
公开(公告)日:1996-04-12
申请号:NL1001349
申请日:1995-10-05
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 , B01J23/843
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