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    Dehydrogenation process
    7.
    发明公开
    Dehydrogenation process 失效
    Dehydrierverfahren。

    公开(公告)号：EP0125230A1

    公开(公告)日：1984-11-14

    申请号：EP84870061.3

    申请日：1984-05-08

    申请人： COSDEN TECHNOLOGY, INC.

    发明人： de Clippeleir, Georges E.M.J. ,  Cahen, Raymond M. ,  Martins Mendes Cerejo, Franscesco A.

    IPC分类号： C07C5/333 ,  C07C15/46

    CPC分类号： B01J29/035 ,  B01J21/08 ,  C07C5/3332 ,  C07C15/40

    摘要： Catalytic dehydrogenation of alkyl- or dialkyl-aromatic hydrocarbons such as ethylbenzene or ethyltoluene to vinyl aromatic hydrocarbons is achieved by passing the aromatic hydrocarbons on a crystalline silica which has been calcined under an inert atmosphere and which contains from about 0.05 to about 1 weight percent of an alkali metal oxide such as sodium oxide. In the preparation of the crystalline silica, limited washing of the crystalline silica precursor is performed to obtain an amount of alkali metal oxide remaining in the crystalline silica between about 0.05 and about 1 weight %.

    Process for the production of vinyltoluene
    9.
    发明公开
    Process for the production of vinyltoluene 失效
    一种用于生产乙烯基甲苯的过程。

    公开(公告)号：EP0062625A1

    公开(公告)日：1982-10-13

    申请号：EP82870016.1

    申请日：1982-04-01

    申请人： COSDEN TECHNOLOGY INC.

    发明人： Watson, James M. ,  Forward, Cleve H. ,  Butler, James R.

    IPC分类号： C07C15/46 ,  C07C7/05

    CPC分类号： C07C15/46

    摘要： A process for the production of vinyltoluene, comprising the steps of: producing a crude vinyltoluene product by the catalytic dehydrogenation of ethyltoluene; removing compounds from the crude vinyltoluene product which have a higher molecular weight than vinyltoluene to form a prepurified crude vinyltoluene product; and fractionally distilling the prepurified crude vinyltoluene product in a distillation apparatus to recover purified vinyltoluene. The higher molecular weight compounds removed are compounds which foster the conversion of vinyltoluene into cross-linked polymer. The compounds removed preferably have more than 11 carbon atoms. In one embodiment, the step of removing higher molecular weight compounds comprises condensing a vaporous crude vinyltoluene product to form a crude vinyltoluene solution, and subjecting the crude vinyltoluene solution to flash distillation to form a vaporous prepurified crude vinyltoluene product. Optionally, the prepurified crude vinyltoluene in the distillation apparatus may include a polymerization inhibitor.

    High severity process for the production of aromatic hydrocarbons
    10.
    发明公开
    High severity process for the production of aromatic hydrocarbons 失效
    一种用于严酷的条件下生产芳烃的过程。

    公开(公告)号：EP0001928A1

    公开(公告)日：1979-05-16

    申请号：EP78300592.9

    申请日：1978-11-03

    申请人： COSDEN TECHNOLOGY INC.

    发明人： Mayes, Warden W.

    IPC分类号： C10G35/04 ,  C07C15/00

    CPC分类号： C10G59/02 ,  Y02P20/582

    摘要： .Disclosed is a process for the production of highly aromatic reformates, having a minimum of nonaromatic material, in high yield from a naphtha feed fraction by high-severity catalytic reforming, using a halogen-promoted reforming catalyst. The process comprises reforming the naphtha feed under reforming conditions of high severity in a plurality of sequentially arranged reaction zones in which the concentration of the halogen component of the reforming catalyst is adjusted to provide a minimal hydrocracking activity relative to the other reforming reactions to the catalyst in the first reaction zones, and an enhanced hydrocracking activity to the catalyst in the last reaction zones. The reformates produced according to this process are particularly useful in the blending of high aromatic content gasolines and/or in the production of high purity aromatic hydrocarbons.