PROCEDE DE PREPARATION DU DIMETHYLCETENE PUIS DU POLYDIMETHYLCETENE A PARTIR DE L'ANHYDRIDE ISOBUTYRIQUE
    7.
    发明授权
    PROCEDE DE PREPARATION DU DIMETHYLCETENE PUIS DU POLYDIMETHYLCETENE A PARTIR DE L'ANHYDRIDE ISOBUTYRIQUE 有权
    工艺用于生产和二甲基乙烯酮POLYDIMETHYLKETEN OFF ISOBUTTERANHYDRID

    公开(公告)号:EP1594832B1

    公开(公告)日:2007-01-10

    申请号:EP04713099.2

    申请日:2004-02-20

    申请人: Arkema France

    IPC分类号: C07C45/89 C07C49/88

    CPC分类号: C08F16/36 C07C45/89 C07C49/88

    摘要: The invention relates to a method of preparing dimethylcetene (DMK) by pyrolysis of isobutyric anhydride (ANIB), consisting in: (a) pre-heating a mixture to between 300 and 340 DEG C at atmospheric pressure, said mixture comprising between 1 and 50 % volume ANIB for between 99 and 50 % inert gas respectively; (b) bringing said mixture to a temperature of between 400 and 550 DEG C for a contact time of between 0.05 and 10 s in order to obtain a mixture of DMK, inert gas, isobutyric acid (AIB) or unreacted ANIB; and (c) cooling (condensation step) the mixture produced in step (b) in order to separate the gaseous mixture comprising the DMK from the condensed ANIB and/or AIB.