COLUMN COMPRISING DUAL FLOW PLATES
    4.
    发明申请
    COLUMN COMPRISING DUAL FLOW PLATES 审中-公开
    具有双流地板的殖民地

    公开(公告)号:WO03043712A8

    公开(公告)日:2003-08-07

    申请号:PCT/EP0213084

    申请日:2002-11-21

    CPC classification number: B01D3/225 B01D3/22

    Abstract: The invention relates to a column for the thermal treatment of mixtures containing at least one polymerisable compound. Said column comprises dual flow plates which are provided with openings, the diameter of each opening being constant inside a dual flow plate. The diameter of the openings of said dual flow plates decreases as the distance of the plates from the inlet of the mixture to be treated increases.

    Abstract translation: 存在对包含一种或多种可聚合化合物的混合物,提出了双流塔板增加有开口,其直径为双流塔板,其中所述双流塔盘与内是恒定的热处理的柱 与待处理混合物入口的距离具有直径逐渐减小的开口。

    VERFAHREN ZUR HERSTELLUNG VON N-SUBSTITUIERTEN PYRAZOLEN
    7.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON N-SUBSTITUIERTEN PYRAZOLEN 失效
    用于生产的N-取代的吡唑

    公开(公告)号:EP0813526A1

    公开(公告)日:1997-12-29

    申请号:EP96905803

    申请日:1996-02-27

    Applicant: BASF AG

    CPC classification number: C07D231/12 C07D233/56 C07D249/08

    Abstract: A process is disclosed for preparing N-substituted pyrazoles having the general formula (I), in which R1 stands for C¿1? to C12 alkyl or C7 to C20 phenylalkyl, and R?2, R3, R4¿ represent independently from each other hydrogen, C¿1? to C12 alkyl, C7 to C20 phenylalkyl or optionally substituted aryl residues, by reacting pyrazoles having the general formula (II), in which R?2, R3 and R4¿ have above-said meanings, with an alcohol having the general formula (III) R1-O-H, in which R1 has above-said meanings, at temperatures from 50 to 400 °C in the presence of a catalyst. The reaction of pyrazole (II) with compound (III) is carried out in a molar ratio from 0.001:1 to 1:1 in the liquid phase at a slight negative pressure up to an overpressure of 250 bars. Acids, their alkyl esters and/or their anhydrides are used as catalysts in a molar ratio from 0.0001:1 to 0.5:1 in relation to pyrazole (II).

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