Process for preparing polyfluoro .gamma.-ketoesters and lactone isomers
thereof
    31.
    发明授权
    Process for preparing polyfluoro .gamma.-ketoesters and lactone isomers thereof 失效
    制备多氟γ-酮酯及其内酯异构体的方法

    公开(公告)号:US4822897A

    公开(公告)日:1989-04-18

    申请号:US056897

    申请日:1987-06-03

    申请人: Carl G. Krespan

    发明人: Carl G. Krespan

    CPC分类号: C07C59/21

    摘要: Polyfluoro .gamma.-ketoester compounds are obtained by reaction of ethylenic monoolefins, a metal or quaternary ammonium cyanide, and a fluoroester. These compounds, which have a general formula R.sub.F C(O)CFYCF.sub.2 CO.sub.2 R.sup.1, can be copolymerized directly with fluorinated ethylenic monoolefins, or further reacted to form vinyl ether and allyl ether derivatives which may also be copolymerized with ethylenic comonomers, forming solid, moldable copolymers with useful properties determined by the nature of pendant functional groups R.sub.F.

    摘要翻译: 多氟γ-酮酯化合物是通过烯属单烯烃,金属或氰化季铵和氟酯的反应获得的。 具有通式RFC(O)CFYCF 2 CO 2 R 1的这些化合物可直接与氟化烯属单烯烃共聚,或进一步反应形成也可与乙烯类共聚单体共聚的乙烯基醚和烯丙基醚衍生物,形成固体, 性质由吊坠功能团RF的性质决定。

    Nickel-cerium oxide-zirconium oxide-silica catalysts for hydrogenation
of succinic anhydride to butyrolactone
    34.
    发明授权
    Nickel-cerium oxide-zirconium oxide-silica catalysts for hydrogenation of succinic anhydride to butyrolactone 失效
    用于将琥珀酸酐氢化成丁内酯的氧化铈 - 氧化锆 - 二氧化硅催化剂

    公开(公告)号:US4668654A

    公开(公告)日:1987-05-26

    申请号:US884843

    申请日:1986-07-11

    申请人: Charles A. Drake

    发明人: Charles A. Drake

    摘要: A process for preparing primarily gamma-butyrolactone comprises the step of contacting under suitable reaction conditions a succinic anhydride containing feed stream and hydrogen, in the presence of a catalyst composition comprising (a) substantially metallic nickel, (b) at least one oxide selected from oxides of cerium and zirconium, and (c) a silica-containing support. In another embodiment, the above described catalyst composition is provided.

    摘要翻译: 主要制备γ-丁内酯的方法包括在合适的反应条件下使含琥珀酸酐的进料流和氢在催化剂组合物存在下接触的步骤,所述催化剂组合物包含(a)基本上金属的镍,(b)至少一种选自 铈和锆的氧化物,和(c)含二氧化硅的载体。 在另一个实施方案中,提供了上述催化剂组合物。

    Process for the preparation of bis(perfluoroalkyl-alkylthio)alkanoic
acids and lactone intermediates thereof
    39.
    发明授权
    Process for the preparation of bis(perfluoroalkyl-alkylthio)alkanoic acids and lactone intermediates thereof 失效
    制备双(全氟烷基 - 烷硫基)链烷酸及其内酯中间体的方法

    公开(公告)号:US4485251A

    公开(公告)日:1984-11-27

    申请号:US452531

    申请日:1982-12-23

    申请人: Robert A. Falk

    发明人: Robert A. Falk

    摘要: Disclosed is a process for the preparation of a bis(perfluoroalkyl-alkylthio)alkanoic acid of the formula ##STR1## wherein each R.sub.f is independently perfluoroalkyl of 3 to 18 carbon atoms or perfluoroalkoxyperfluoroalkyl of 3 to 18 carbon atoms, or mixtures thereof;each A is independently alkylene of up to 6 carbon atoms or said alkylene interrupted by --O--; N(H)-- or --N(lower alkyl)--;R is hydrogen or alkyl of 1 to 6 carbon atoms;R.sub.1 is hydrogen or lower alkyl; andR.sub.2 is hydrogen, lower alkyl, aryl or aryl substituted lower alkyl;by reacting a perfluoroalkyl-alkyl mercaptan of the formulaR.sub.f --A--SH (II)with a lactone of the formula ##STR2## in the presence of a catalytic amount of a Lewis acid to form a perfluoroalkyl-alkylthio lactone of the formula ##STR3## and reacting said perfluoroalkyl-alkylthio lactone with additional perfluoroalkyl-alkylmercaptan of the formulaR.sub.f --A--SH (IIa)in the presence of a catalytic amount of a Lewis acid, to obtain said bis(perfluoroalkyl-alkylthio)alkanoic acid of formula (I).

    摘要翻译: 公开了制备式(I)的双(全氟烷基 - 烷硫基)链烷酸的方法,其中每个Rf独立地为3至18个碳原子的全氟烷基或3至18个碳原子的全氟烷氧基全氟烷基,或其混合物 ; 每个A独立地为至多6个碳原子的亚烷基或被-O-间隔的所述亚烷基; N(H) - 或-N(低级烷基) - ; R是氢或1至6个碳原子的烷基; R1是氢或低级烷基; R 2为氢,低级烷基,芳基或芳基取代的低级烷基; 通过使式Rf-A-SH(II)的全氟烷基 - 烷基硫醇与式(III)的内酯在催化量的路易斯酸的存在下反应,形成全氟烷基 - 烷硫基内酯 (IV)化合物,并使所述全氟烷基 - 烷硫基内酯与式Rf-A-SH(IIa)的另外的全氟烷基 - 烷基硫醇在催化量的路易斯酸存在下反应,得到所述双(全氟烷基 - 烷硫基 )式(I)的链烷酸。