Process for producing liquid crystal polymer
    4.
    发明授权
    Process for producing liquid crystal polymer 有权
    液晶聚合物的制造方法

    公开(公告)号:US6114492A

    公开(公告)日:2000-09-05

    申请号:US483589

    申请日:2000-01-14

    摘要: A potassium catalyst is used in combination with a cobalt catalyst to increase the reaction rate and/or reduce the reaction temperature of a melt polymerization process for producing an anisotropic melt-phase forming polymer derived from p-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, aromatic hydroxycarboxylic acid, aromatic diol, at least a portion of which is resorcinol and at least one aromatic dicarboxylic acid, compared to a like process wherein either catalyst is used alone.

    摘要翻译: 钾催化剂与钴催化剂组合使用以提高反应速率和/或降低熔融聚合方法的反应温度,用于制备衍生自对羟基苯甲酸,6-羟基-2-羟基苯甲酸的各向异性熔融相形成聚合物, 萘甲酸,芳族羟基羧酸,芳族二醇,至少一部分为间苯二酚和至少一种芳族二羧酸,与其中单独使用催化剂的类似方法相比。

    Production of alkyl methacrylate
    8.
    发明授权
    Production of alkyl methacrylate 失效
    甲基丙烯酸烷基酯的生产

    公开(公告)号:US4579967A

    公开(公告)日:1986-04-01

    申请号:US464270

    申请日:1983-02-07

    摘要: This invention provides a process for converting alkyl isobutyrate to alkyl methacrylate via alkyl-hydroperoxy-isobutyrate and alkyl alpha-hydroxyisobutyrate intermediate.An important aspect of the process is the use of a particulate metal oxide substrate in the first step of the process.

    摘要翻译: 本发明提供了通过烷基 - 氢过氧异丁酸酯和α-羟基异丁酸烷基酯中间体将异丁酸烷基酯转化为甲基丙烯酸烷基酯的方法。 该方法的一个重要方面是在该方法的第一步中使用颗粒状金属氧化物基质。

    Isomerization of branched aldehydes to ketones
    9.
    发明授权
    Isomerization of branched aldehydes to ketones 失效
    支链醛与酮的异构化

    公开(公告)号:US4537995A

    公开(公告)日:1985-08-27

    申请号:US549129

    申请日:1983-11-07

    IPC分类号: C07C45/54 C07C45/67

    CPC分类号: C07C45/54

    摘要: A process of isomerizing branched aldehydes to ketones is provided which comprises contacting at isomerization conditions a branched aldehyde with a zeolite catalyst of the formula: ##EQU1## wherein M is selected from the group consisting of a mixture of alkali metal cations, especially sodium, and tetraalkylammonium cations, the alkyl groups of which preferably contain 2 to 5 carbon atoms, and x is at least 5. The contacting is conducted at a temperature of from about 200.degree. C. to about 600.degree. C. and at a pressure of from about 20 psig to about 100 psig. The branched aldehyde is contacted in the presence of water in a molar ratio of water-to-aldehyde of up to about 20 to 1.

    摘要翻译: 提供将支化醛异构化成酮的方法,其包括在异构化条件下使支化醛与下式的沸石催化剂接触:其中M选自碱金属阳离子的混合物,特别是 钠和四烷基铵阳离子,其烷基优选含有2至5个碳原子,x至少为5.接触在约200℃至约600℃的温度和压力下进行 为约20psig至约100psig。 支链醛在水的存在下以水至醛的摩尔比达到约20:1。