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    A process for the production of dienes from aldehydes
    51.
    发明公开
    A process for the production of dienes from aldehydes 失效
    一种用于从醛制备二烯的方法。

    公开(公告)号：EP0174898A2

    公开(公告)日：1986-03-19

    申请号：EP85630145.2

    申请日：1985-09-03

    申请人： THE GOODYEAR TIRE & RUBBER COMPANY

    发明人： Wideman, Lawson Gibson ,  Hsu, Wen-Liang ,  Maly, Neil Arthur ,  Matrans, Barry Allen ,  Strozier, Robert William

    IPC分类号： C07C1/253 ,  B01J27/16 ,  C07C11/12

    CPC分类号： C07C1/24 ,  B01J27/16 ,  C07C2527/167 ,  C07C11/12 ,  C07C11/18

    摘要： @ This invention is directed to a process for the conversion of an aldehyde to a diolefin comprising contacting an aldehyde of 4 to 6 carbon atoms in the vapor phase at a temperature of 300° to 400°C with a catalyst comprising boron phosphate wherein the initial molar ratio of phosphorous (P) to boron (B) (P/B) is less than 0.1 but greater than 0.6 which is in intimate admixture with from 0.1 to 10 weight percent graphite. More specifically, this invention is concerned with a process for the catalytic dehydration of 2-methylbutanal (2MBA) to isoprene in the vapor phase with a boron phosphate catalyst wherein the improvement comprises the use of a catalyst with a molar ratio of P/B of less than 0.1 but greater than 0.6 which contains from 0.1 to 10 weight percent graphite and 0 to 10 mole percent, based on moles of boron, of ammonia or an amine selected from the group consisting of mono-, di- and/or tri- alkyl amines of 1 to 10 carbon atoms.