Method for the cyclization of gamma-delta, or delta-epsilon unsaturated
alcohols
    4.
    发明授权
    Method for the cyclization of gamma-delta, or delta-epsilon unsaturated alcohols 失效
    γ-δ或δ-ε不饱和醇环化的方法

    公开(公告)号:US4284567A

    公开(公告)日:1981-08-18

    申请号:US81885

    申请日:1979-10-04

    CPC分类号: C07D309/04 C07D307/16

    摘要: In the cyclization of gamma-delta or delta-epsilon unsaturated alcohols in order to obtain certain tetrahydrofuran and tetrahydropyran derivatives which are useful in the perfuming of detergents, the improvement consisting in that the alcohol to be cyclized is reacted with a cationic ion-exchange resin. The useful temperature range is from 20.degree. C. to 150.degree. C.: in practice the alcohol and the resin are boiled together or refluxed until the reaction is completed. A number of examples is reported and physicochemical data are given.

    摘要翻译: 在γ-δ或δ-ε不饱和醇的环化中,为了获得可用于加香洗涤剂的某些四氢呋喃和四氢吡喃衍生物,改进之处在于将要环化的醇与阳离子离子交换树脂 。 有用的温度范围为20℃至150℃。实际上,将醇和树脂一起煮沸或回流,直到反应完成。 报道了一些实例并给出了物理化学数据。

    Process for catalytic dimerization of isobutene
    6.
    发明授权
    Process for catalytic dimerization of isobutene 失效
    异丁烯催化二聚的方法

    公开(公告)号:US5324878A

    公开(公告)日:1994-06-28

    申请号:US955472

    申请日:1992-10-02

    摘要: Disclosed is a process for carrying out the selective dimerization of isobutene in order to produce alpha- and beta-di-isobutene dimer.sub.3, according to which process an isobutene stream is brought into contact, under dimerization conditions, with a solid silica gel/alumina catalyst which is amorphous when analyzed by X-ray diffraction, displays a molar ratio of SiO.sub.2 /Al.sub.2 O.sub.3 comprised within the range of from 30:1 to 500:1, has a surface-area comprised within the range of from 500 to 1000 m.sup.2 /g, a porosity of from 0.3 to 0.6 ml/g and an average pore diameter of approximately 10 .ANG. (.ANG.ngstrom), and is free from pores with a larger diameter than 30 .ANG..

    摘要翻译: 公开了用于进行异丁烯的选择性二聚以产生α-和β-二异丁烯二聚体3的方法,根据该方法,使异丁烯料流在二聚条件下与固体硅胶/氧化铝催化剂接触 当通过X射线衍射分析时其是非晶的,显示出包含在30:1至500:1范围内的SiO 2 / Al 2 O的摩尔比,其表面积在500至1000m 2 / g的范围内 ,孔隙率为0.3至0.6ml / g,平均孔径约为10安培(ANGSTROM ngstrom),并且没有直径大于30安培的孔。

    Cyanomethyl substituted tetrahydropyrans useful as fragrances for
detergents
    7.
    发明授权
    Cyanomethyl substituted tetrahydropyrans useful as fragrances for detergents 失效
    氰基甲基取代的四氢吡喃可用作洗涤剂的香料

    公开(公告)号:US4150037A

    公开(公告)日:1979-04-17

    申请号:US918445

    申请日:1978-06-23

    IPC分类号: C07D307/16 C07D309/04

    CPC分类号: C07D307/16 C07D309/04

    摘要: In the cyclization of gamma-delta or delta-epsilon unsaturated alcohols in order to obtain certain tetrahydrofuran and tetrahydropyran derivatives which are useful in the perfuming of detergents, the improvement consisting in that the alcohol to be cyclized is reacted with a cationic ion-exchange resin. The useful temperature range is from 20.degree. C. to 150.degree. C.: in practice the alcohol and the resinare boiled together or refluxed until the reaction is completed. A number of examples is reported and physicochemical data are given.

    摘要翻译: 在γ-δ或δ-ε不饱和醇的环化中,为了获得可用于加香洗涤剂的某些四氢呋喃和四氢吡喃衍生物,改进之处在于将要环化的醇与阳离子离子交换树脂 。 有用的温度范围为20℃至150℃。实际上,将醇和树脂一起煮沸或回流至反应完成。 报道了一些实例并给出了物理化学数据。