Preparation of vinyl ethers
    42.
    发明授权
    Preparation of vinyl ethers 失效
    乙烯的制备

    公开(公告)号:US5130435A

    公开(公告)日:1992-07-14

    申请号:US565180

    申请日:1990-08-09

    IPC分类号: C07C41/28

    CPC分类号: C07C41/28 Y02P20/582

    摘要: Vinyl ethers of the formula ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are identical to or different from one another, each being hydrogen, straight-chain or branched alkyl or alkenyl of up to 12 carbon atoms, cycloalkyl or cycloalkylene of from 5 to 8 carbon atoms, aryl, alkylaryl, alkenylaryl, aralkyl and aralkenyl of from 6 to 16 carbon atoms, halogen-substituted aryl or heterocyclyl, and in addition the radicals R.sup.1 and R.sup.2 or R.sup.1 and R.sup.3, together with the carbon atom to which they are bonded, can form a cycloalkane, cycloalkene or a heterocycle, and R.sup.4 is alkyl, alkylaryl or aralkyl, are prepared by eliminating an alcohol from an acetal/ketal of the formula ##STR2## where R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are each as defined above, in the presence of a phosphate of zeolite structure and/or a precipitated phosphate of the elements B, Zr, Ce or Fe and/or phosphoric acid or boric acid on carrier material and/or acidic undoped metal oxide as catalyst, the reaction being preferably carried out in the gas phase.

    摘要翻译: 式中,R 1,R 2和R 3彼此相同或不同的乙烯基醚,各自为氢,直至12个碳原子的直链或支链烷基或烯基,5至8的环烷基或亚环烷基 碳原子,芳基,烷基芳基,烯基芳基,芳烷基和具有6至16个碳原子的芳烯基,卤素取代的芳基或杂环基,此外基团R 1和R 2或R 1和R 3与它们所键合的碳原子一起 可以形成环烷烃,环烯烃或杂环,并且R 4是烷基,烷基芳基或芳烷基,通过从式(I)的缩醛/缩酮中除去醇来制备,其中R 1,R 2,R 3和R 4各自如上所定义 在载体材料和/或酸性未掺杂的金属氧化物作为催化剂的沸石结构的磷酸盐和/或元素B,Zr,Ce或Fe和/或磷酸或硼酸的沉淀磷酸盐存在下,反应为 优选在气相中进行。

    Preparation of vinyl ethers
    48.
    发明授权
    Preparation of vinyl ethers 失效
    乙烯基醚的制备

    公开(公告)号:US4891451A

    公开(公告)日:1990-01-02

    申请号:US213589

    申请日:1988-06-30

    IPC分类号: C07C41/28

    摘要: Vinyl ethers of the formula (I) ##STR1## where R.sup.1 to R.sup.3 are identical or different and are each hydrogen, a straight-chain or branched alkyl or alkenyl radical of not more than 12 carbon atoms, halogen-substituted alkyl, a cycloalkyl or cycloalkenyl radical of 5 to 8 carbon atoms, an aryl, alkylaryl, alkenylaryl, aralkyl or aralkenyl radical of 6 to 16 carbon atoms, halogen-substituted aryl or a heterocyclic radical and furthermore R.sup.1 and R.sup.2 or R.sup.1 and R.sup.3, together with the carbon atom to which they are bonded, may form a cycloalkane, cycloalkene or heterocyclic structure, and R.sup.4 is alkyl, alkylaryl or aralkyl, are prepared by a process in which an alcohol is eliminated from an acetal or ketal of the formula (II) ##STR2## where R.sup.1 to R.sup.4 have the above meanings, in the presence of borosilicate and/or iron silicate zeolites as catalysts.

    摘要翻译: 式(I)的乙烯基醚其中R 1至R 3相同或不同并且各自为氢,不超过12个碳原子的直链或支链烷基或烯基,卤素取代的烷基, 5至8个碳原子的环烷基或环烯基,6至16个碳原子的芳基,烷基芳基,烯基芳基,芳烷基或芳烯基,卤素取代的芳基或杂环基,此外R1和R2或R1和R3连同 其键合的碳原子可以通过其中从式(II)的缩醛或缩酮中除去醇的方法制备环烷烃,环烯烃或杂环结构,并且R 4是烷基,烷基芳基或芳烷基, 在有硼硅酸盐和/或铁硅酸盐沸石作为催化剂的情况下,R1至R4具有上述含义的图像(II)。