利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

40 条记录 (耗时 0.028 秒)

    Process for the manufacture of glycolic acid or its esters
    11.
    发明授权
    Process for the manufacture of glycolic acid or its esters 失效
    乙醇酸或其酯的制备方法

    公开(公告)号：US4128575A

    公开(公告)日：1978-12-05

    申请号：US853210

    申请日：1977-11-14

    申请人： Ernst I. Leupold ,  Hans-Jurgen Arpe

    发明人： Ernst I. Leupold ,  Hans-Jurgen Arpe

    IPC分类号： C07C51/367 ,  C07C59/06

    CPC分类号： C07C51/367

    摘要： Glycolic acid or the esters thereof are prepared by reacting paraformaldehyde or trioxane or a mixture thereof with formic acid or a formic acid ester in the liquid phase at a temperature of from 70.degree. to 200.degree. C in the presence of a strongly acidic catalyst.

    摘要翻译： 乙醇酸或其酯通过使多聚甲醛或三恶烷或其混合物与甲酸或甲酸酯在液相中在70℃至200℃的温度下在强酸性催化剂存在下反应来制备。

    Process for the acylation of naphthyl ethers with the aid of zeolite catalysts
    14.
    发明授权
    Process for the acylation of naphthyl ethers with the aid of zeolite catalysts 失效
    借助沸石催化剂酰化萘基醚的方法

    公开(公告)号：US5227529A

    公开(公告)日：1993-07-13

    申请号：US944798

    申请日：1992-09-14

    申请人： Marita Neuber ,  Ernst I. Leupold

    发明人： Marita Neuber ,  Ernst I. Leupold

    IPC分类号： C07C45/46

    CPC分类号： C07C45/46

    摘要： A process for the acylation of naphthyl ethers of the formula ##STR1## using acylating agents of the formula R.sup.2 --CO--X to give acylated naphthyl ethers of the formula ##STR2## in which R.sup.1 and R.sup.2 independently of one another are C.sub.1 -- to C.sub.10 -alkyl, C.sub.2 -- to C.sub.10 -alkenyl or C.sub.3 - to C.sub.8 -cycloalkyl and R.sup.2 is additionally C.sub.6 - to C.sub.10 -aryl and X is Cl, Br, --OCOR.sup.2, OH or C.sub.1 - to C.sub.3 -alkoxy, comprises carrying out the reaction presence of zeolite catalysts which have the formula Z.Al.sub.2 O.sub.3.x SiO.sub.2 (III) in the anhydrous and template-free form, in which Z is M.sup.I.sub.2 O, M.sup.II O and/or (M.sup.III).sub.2 O.sub.3, in which M.sup.I is an alkali metal atom, ammonium or a hydrogen atom, M.sup.II is an alkaline earth metal atom and M.sup.III is a rare earth metal of atomic number 57 to 71 in the periodic table of the elements, and x is a number from 4 to 4000, with the proviso that at least 50% of the negative lattice charges are compensated by protons, ammonium and/or the other metal ions mentioned under M.sup.II and M.sup.III, and the pores of which are formed from at least 10 tetrahedral atoms.

    摘要翻译： 使用式R2-CO-X的酰化剂酰化式（I）的萘基醚的方法，得到式（II）的酰化萘基醚，其中R 1和R 2独立地为一个 另一个是C 1至C 10 - 烷基，C 2至C 10 - 烯基或C 3 -C 8 - 环烷基，R 2另外为C 6 -C 10 - 芳基，X为Cl，Br，-OCOR 2，OH或C 1至C 3 - 烷氧基 包括以无水和无模板形式存在具有式Z.Al 2 O 3。x SiO 2（III）的沸石催化剂的反应，其中Z为MI2O，MIIO和/或（MIII）2O3，其中MI 是碱金属原子，铵或氢原子，MII是碱土金属原子，MIII是元素周期表中原子序数57〜71的稀土金属，x是4〜4000的数， 条件是至少50％的负晶格电荷由质子，铵和/或MII和MIII下提及的其它金属离子补偿，孔的孔为fo 从至少10个四面体原子。

    Polyvinyl acetals and their use
    15.
    发明授权
    Polyvinyl acetals and their use 失效
    聚乙烯缩醛及其用途

    公开(公告)号：US5019624A

    公开(公告)日：1991-05-28

    申请号：US512992

    申请日：1990-04-23

    申请人： Matthias Gutweiler ,  Robert K. Driscoll ,  Ernst I. Leupold

    发明人： Matthias Gutweiler ,  Robert K. Driscoll ,  Ernst I. Leupold

    IPC分类号： C08F16/38 ,  C08F8/28 ,  C09D129/14 ,  C09J129/14

    CPC分类号： C08F8/28

    摘要： Acetals of polyvinyl alcohol are described in which at least some of the acetal groups are derived from terminally etherified oxyethylene aldehydes/oxaalkanals of the formula ##STR1## The new acetals are internally plasticized and can be processed thermoplastically without external plasticizers. Depending on the nature of the radical R, which can be aliphatic, cycloaliphatic or aromatic, and the size of n, an integer, preferably 1 to 3, and, on the nature of other aldehydes which may be co-used for mixed acetalation, the new acetals are soluble in water or organic solvents.

    摘要翻译： 描述了聚乙烯醇的缩聚物，其中至少一些缩醛基团衍生自具有下式的末端醚化的氧乙烯醛/奥沙拉醛。新的缩醛内部增塑，并且可以在没有外部增塑剂的情况下热塑性地加工。 取决于基团R的性质，其可以是脂族的，脂环族的或芳族的，并且n的大小，整数，优选1至3，以及可以共同用于混合缩醛化的其它醛的性质， 新的缩醛可溶于水或有机溶剂。

    Process for isomerizing monochlorotoluenes or dichlorotoluenes
    18.
    发明授权
    Process for isomerizing monochlorotoluenes or dichlorotoluenes 失效
    异构化单氯甲苯或二氯甲苯的方法

    公开(公告)号：US4935561A

    公开(公告)日：1990-06-19

    申请号：US740180

    申请日：1985-05-31

    申请人： Klaus Eichler ,  Hans-Jurgen Arpe ,  Herbert Baltes ,  Ernst I. Leupold

    发明人： Klaus Eichler ,  Hans-Jurgen Arpe ,  Herbert Baltes ,  Ernst I. Leupold

    IPC分类号： C07C17/358

    CPC分类号： C07C17/358 ,  Y02P20/582

    摘要： The invention relates to a process for isomerizing monochlorotoluenes or dichlorotoluenes on a zirconium-containing zeolite catalyst of the Pentasil type. Catalysts of this type are distinguished by a particularly high activity coupled with a long service life. In particular, the invention relates to the preparation of a mixture 3-chlorotoluene and 4-chlorotoluene by isomerizing 2-chlorotoluene on zircoium-containing zeolite catalysts of the Pentasil type.The invention also relates to the preparation of a mixture of 2,5-dichlorotoluene and 3,4-dichlorotoluene by appropriate isomerization of 2,4-dichlorotoluene, and to the preparation of a mixture of 2,4-dichlorotoluene and 2,5-dichlorotoluene by appropriate isomerization of 3,4-dichlorotoluene.

    摘要翻译： 本发明涉及在Pentasil类型的含锆沸石催化剂上异构化一氯甲苯或二氯甲苯的方法。 这种类型的催化剂通过特别高的活性加上长的使用寿命来区分。 特别地，本发明涉及通过在Pentasil型的含锆沸石催化剂上异构化2-氯甲苯来制备3-氯甲苯和4-氯甲苯的混合物。 本发明还涉及通过2,4-二氯甲苯的适当异构化制备2,5-二氯甲苯和3,4-二氯甲苯的混合物，以及制备2,4-二氯甲苯和2,5-二氯甲苯的混合物， 二氯甲苯通过3,4-二氯甲苯的适当异构化。

    Process for isomerizing alkylthiophenes
    19.
    发明授权
    Process for isomerizing alkylthiophenes 失效
    烷基噻吩异构化方法

    公开(公告)号：US4783541A

    公开(公告)日：1988-11-08

    申请号：US135504

    申请日：1987-12-18

    申请人： Klaus Eichler ,  Ernst I. Leupold

    发明人： Klaus Eichler ,  Ernst I. Leupold

    IPC分类号： C07D333/10 ,  B01J27/00 ,  C07B61/00 ,  C07D333/08

    CPC分类号： C07D333/08

    摘要： The invention relates to a process for isomerizing alkylthiophenes on zeolite catalysts. In particular, methylthiophene and ethylthiophene can be isomerized by this process. Suitable zeolites are in particular synthetic zeolites of the pentasil, mordenite of faujasite type in their acid form.

    摘要翻译： 本发明涉及在沸石催化剂上异构化烷基噻吩的方法。 特别地，甲基噻吩和乙基噻吩可以通过该方法异构化。 合适的沸石特别是它们的酸形式的八面体沸石丝光沸石的合成沸石。

    Process for the manufacture of acetic acid ethyl ester
    20.
    发明授权
    Process for the manufacture of acetic acid ethyl ester 失效
    乙酸乙酯的制备方法

    公开(公告)号：US4128727A

    公开(公告)日：1978-12-05

    申请号：US859534

    申请日：1977-12-12

    申请人： Ernst I. Leupold ,  Hans-Jurgen Arpe ,  Albert Renken ,  Ernst-Gunther Schlosser

    发明人： Ernst I. Leupold ,  Hans-Jurgen Arpe ,  Albert Renken ,  Ernst-Gunther Schlosser

    IPC分类号： C07C67/05

    CPC分类号： C07C67/04

    摘要： Acetic acid ethyl ester is prepared by passing ethylene over a fixed-bed catalyst composed of silicon dioxide, which has a surface from 50 to 200 m.sup.2 /g and which is impregnated with H.sub.2 SO.sub.4, diethylsulfate or ethylsulfuric acid or mixtures of these compounds, with periodically alternating quantities of acetic acid, at a temperature from 130.degree. to 170.degree. C, the acid concentration, calculated on ethylene, varying constantly over a range from 0.01 to 40% by mole.

    摘要翻译： 通过使乙烯通过由二氧化硅组成的固定床催化剂制备乙酸乙酯，二氧化硅的表面为50至200m 2 / g，并用H 2 SO 4，硫酸二乙酯或乙基硫酸或这些化合物的混合物浸渍，并定期 交替量的乙酸在130-170℃的温度下，以乙烯计算的酸浓度在0.01至40摩尔％的范围内不断变化。