Process for the preparation of terephthalic, isophthalic and phthalic
dialdehydes
    1.
    发明授权
    Process for the preparation of terephthalic, isophthalic and phthalic dialdehydes 失效
    制备对苯二甲酸,间苯二甲酸和邻苯二甲醛的方法

    公开(公告)号:US4239703A

    公开(公告)日:1980-12-16

    申请号:US62826

    申请日:1979-08-01

    CPC classification number: C07C45/38

    Abstract: A process for the preparation of a terephthalic, isophthalic or phthalic dialdehyde is described by dehydrogenation of the corresponding xylylene glycol in the vapor phase at 250.degree. to 500.degree. C. The process is carried out in the presence of oxygen, water vapor and a dehydrogenation catalyst, suitably a silver dehydrogenation catalyst.

    Abstract translation: 对苯二甲酸,间苯二甲酸或邻苯二甲酸二醛的制备方法,是在250〜500℃的气相中脱氢相应的二甲苯二醇来进行的。该方法是在氧气,水蒸气和脱氢剂的存在下进行的 催化剂,合适的是银脱氢催化剂。

    Process for preparing benzylalcohols
    3.
    发明授权
    Process for preparing benzylalcohols 失效
    制备苄醇的方法

    公开(公告)号:US4283565A

    公开(公告)日:1981-08-11

    申请号:US974468

    申请日:1978-12-29

    CPC classification number: C07C29/1285 C07C67/03

    Abstract: There is described an essentially two step process for the preparation of benzylalcohols including those benzylalcohols having substituents on the benzyene ring by reaction of a substituted or unsubstituted benzyl halide with a formate typically an alkali or alkaline earth metal formate to form the corresponding substituted or unsubstituted benzyl formate. In the second step of the process the benzyl formate is contacted with an alcohol whereby the same is converted into the desired benzylalcohol. Both steps can be performed employing catalysts. Described in the specification is the realization of the desired product in exceptionally high yields in a short period of time whereby the process is characterized by high space-time yields.

    Abstract translation: 描述了通过取代或未取代的苄基卤与通常为碱金属或碱土金属甲酸盐的甲酸盐反应形成相应的取代或未取代的苄基苄基的苄基醇,其中包括在苄基环上具有取代基的那些苄醇的基本上两步法 甲酸盐 在该方法的第二步中,将甲酸苄酯与醇接触,由此将其转化为所需的苄醇。 可以使用催化剂进行两个步骤。 在说明书中描述的是在短时间内以非常高的产量实现期望的产品,由此该方法的特征在于高的空时产率。

    Making a measuring chamber
    6.
    发明授权
    Making a measuring chamber 失效
    做一个测量室

    公开(公告)号:US5163601A

    公开(公告)日:1992-11-17

    申请号:US712927

    申请日:1991-06-07

    CPC classification number: G01N21/03

    Abstract: A method for making a gas chamber for photometric measuring equipment comprises providing a metal frame with recesses on opposite sides establishing a web and at least one opening in the web and having solder surface areas; providing at least two calcium fluoide panes, said panes each having a rim portion; is improved by providing rim surface portions of the panes about to face the recess-web portion of said metal frame with a plurality of layers, by (i) physical vapor depositing a thin chromium nickel layer, (ii) physical vapor depositing thereon a nickel layer, and (iii) by physical vapor depositing thereon a gold layer; vapor depositing on the web portion around the opening of said recesses a gold layer; providing at least two solder elements of basically ring-shaped configuration respectively to be interposed between the web and the panes, the soldering elements being configured so that between their respective outer contour and walls of the recesses a solder flow space obtains when the solder elements are placed into the recesses; and soldering the element on one side for solder-connecting the respective pane to the web at a temperature of about 213.degree. C. in an inert gas and the other element on the other side of and to the web and the respective other pane at a soldering temperature at about 170.degree. C. in an inert gas.

    Abstract translation: 一种用于制造用于测光测量设备的气室的方法包括:在相对侧上设置具有凹槽的金属框架,其形成腹板和所述腹板中的至少一个开口并具有焊料表面区域; 提供至少两个氟化钙窗格,所述窗格各具有边缘部分; 通过以下方式改进:通过(i)物理气相沉积薄铬镍层,(ii)物理气相沉积其上的镍,通过提供具有多个层的面板的边缘表面部分以面对所述金属框架的凹形腹板部分 层,以及(iii)通过物理气相沉积金层; 在所述凹槽的开口周围的纤维网部分上气相沉积金层; 提供至少两个基本上是环形结构的焊接元件,以分别插入在幅材和窗板之间,焊接元件被构造成使得在它们各自的外轮廓和​​凹槽的壁之间,当焊料元素为 放在凹槽中; 并且在一侧焊接元件以在惰性气体中在大约213℃的温度下将相应的窗格焊接到幅材上,而在另一侧的另一个元件和幅材和相应的另一个窗格上 焊接温度约为170℃,在惰性气体中。

    Casting resins on the basis of acrylic acid esters
    8.
    发明授权
    Casting resins on the basis of acrylic acid esters 失效
    基于丙烯酸酯浇铸树脂

    公开(公告)号:US4868239A

    公开(公告)日:1989-09-19

    申请号:US183254

    申请日:1988-04-08

    CPC classification number: C08F2/44 C08L33/06 C08L43/04

    Abstract: Disclosed are casting resins made from acrylic acid esters with a high content of finely dispersed fillers. The casting resins contain a polymeric organosilicon compound having functional and nonfunctional groups. As functional groups, the copolymer contains one or more alkoxysilyl groups and one or more (meth)acryloxysilyl groups. The copolymer furthermore contains by copolymerization at least one nonfunctional comonomer having an ethylenically unsaturated grouping as well as an additional comonomer of the group of the vinyl carboxylic acid esters and (meth)acrylic acid esters, if desired. The addition of these polymeric organosilanes to known casting resins brings about a greater lowering of the viscosity of these resins, which are used, for example, for the manufacture of sanitary appliances.

    Abstract translation: 公开了由具有高含量的细分散填料的丙烯酸酯制成的浇铸树脂。 铸塑树脂含有具有官能团和非官能团的聚合物有机硅化合物。 作为官能团,共聚物含有一个或多个烷氧基甲硅烷基和一个或多个(甲基)丙烯酰氧基甲硅烷基。 共聚物进一步含有至少一种具有烯属不饱和基团的非官能共聚单体以及乙烯基羧酸酯和(甲基)丙烯酸酯基团的另外的共聚单体,如果需要的话。 将这些聚合物有机硅烷加入到已知的铸塑树脂中导致这些树脂的粘度的更大降低,例如用于卫生设备的制造。

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