Hemiacetals of glyoxylic esters and a process for the isolation of
glyoxylic esters
    1.
    发明授权
    Hemiacetals of glyoxylic esters and a process for the isolation of glyoxylic esters 失效
    乙醛酸酯的半缩醛和乙醛酸酯的分离方法

    公开(公告)号:US4814491A

    公开(公告)日:1989-03-21

    申请号:US193225

    申请日:1988-05-11

    CPC分类号: C07C67/54

    摘要: The invention relates to hemiacetals of glyoxylic esters and to a process for obtaining a glyoxylic ester having a C.sub.1 to C.sub.4 ester group from a mixture which essentially contains a glyoxylic ester of this type plus water and/or a C.sub.1 to C.sub.4 alcohol ROH. In this, the glyoxylic ester and the water and/or the alcohol are partly or completely in a chemically bonded form. A higher alcohol R'OH having a boiling point above 180.degree. C. is added, and distillation is carried out under a pressure not exceeding 800 mbar to remove first the water and/or the alcohol ROH and then the glyoxylic ester.

    摘要翻译: 本发明涉及乙醛酸酯的半缩醛,以及从基本上含有这种乙醛酸酯和/或C1〜C4醇ROH的混合物中获得具有C1〜C4酯基的乙醛酸酯的方法。 在此,乙醛酸酯和水和/或醇部分或完全以化学键合形式。 加入沸点高于180℃的高级醇R'OH,并在不超过800毫巴的压力下进行蒸馏,首先除去水和/或醇ROH,然后除去乙醛酸酯。

    Antenna device for a motor vehicle and the respective motor vehicle
    2.
    发明申请
    Antenna device for a motor vehicle and the respective motor vehicle 有权
    用于机动车辆的天线装置和相应的机动车辆

    公开(公告)号:US20060017631A1

    公开(公告)日:2006-01-26

    申请号:US11169349

    申请日:2005-06-29

    IPC分类号: H01Q1/32

    CPC分类号: H01Q21/30 H01Q1/325 H01Q1/38

    摘要: An antenna device (8) for a motor vehicle (10) is disclosed whereby the antenna device (8) includes a dielectric carrier (1) and components mounted on it, including at least one antenna (3; 6) and at least one impedance transformer (5) assigned to this one, as a minimum, antenna (6). In addition, the motor vehicle (10) is described with the antenna device (8) being mounted in a roof area (14) of the motor vehicle (10) and a spoiler (11) in which the antenna device (8) is mounted.

    摘要翻译: 公开了一种用于机动车辆(10)的天线装置(8),由此天线装置(8)包括介质载体(1)和安装在其上的部件,包括至少一个天线(3; 6)和至少一个阻抗 分配给这一个的变压器(5),至少天线(6)。 另外,用天线装置(8)安装在机动车辆(10)的屋顶区域(14)中的机动车辆(10)和安装有天线装置(8)的扰流器(11)来描述机动车辆 。

    Process for the preparation of
6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide
    3.
    发明授权
    Process for the preparation of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide 失效
    制备6-甲基-3,4-二氢-1,2,3-恶噻嗪-4-酮2,2-二氧化物的方法

    公开(公告)号:US4876341A

    公开(公告)日:1989-10-24

    申请号:US227465

    申请日:1988-08-02

    IPC分类号: A23L27/30 C07D291/06

    CPC分类号: C07D291/06

    摘要: Acetoacetamide-N-sulfonic acid and its salts are cyclized with at least approximately the equimolar amount of SO.sub.3 in short times, preferably in special apparatus, to give 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide. In the case where more than the equimolar amount of SO.sub.3 is used, the latter compound is produced as an SO.sub.3 adduct which then needs to be hydrolyzed; the hydrolysis also takes place in short times and, particularly advantageously, in apparatus of the same type as for the cyclization.The non-toxic salts, especially the potassium salt - of 6-methyl-3,4-dihydro-1,2,3-oxathiazin-4-one 2,2-dioxide are valuable synthetic sweeteners.

    摘要翻译: 乙酰乙酰胺-N-磺酸及其盐在短时间内至少约等摩尔量的SO 3环化,优选在特殊装置中环化,得到6-甲基-3,4-二氢-1,2,3-氧杂噻嗪-4 - 一种二氧化二砷。 在使用多于等摩尔量的SO 3的情况下,后一种化合物生成为需要水解的SO 3加合物; 水解也发生在短时间内,特别有利地发生在与环化相同类型的装置中。 6-甲基-3,4-二氢-1,2,3-氧杂噻嗪-4-酮2,2-二氧化物的无毒盐,特别是钾盐是有价值的合成甜味剂。