Process for producing carboxylic acid esters and catalysts therefor
    1.
    发明授权
    Process for producing carboxylic acid esters and catalysts therefor 失效
    制备羧酸酯及其催化剂的方法

    公开(公告)号:US5922900A

    公开(公告)日:1999-07-13

    申请号:US922558

    申请日:1997-09-03

    CPC分类号: C07C67/08

    摘要: A process for producing carboxylic acid esters by the following steps:a) preparation of a reaction mixture containing an alcohol and a carboxylic acid and/or a carboxylic anhydride and/or a carboxylic acid ester and or a partially esterified carboxylic acid,b) heating of this mixture to the suitable reaction temperature in the presence of a solid polysiloxane insoluble in the reaction medium and having sulphonic acid groups with intensive thorough mixing accompanied by continuous separation of the reaction water which forms, wherein the polysiloxane used as the catalyst in modified by treatment with a soluble aluminum, titanium or zirconium compound, and the spherical particles thereof have a diameter of 0.01 to 3 mm, a specific surface of 0.1 to 1200 m.sup.2 /g, a specific pore volume of 0.01 to 6.0 ml/g and a bulk density of 50 to 1000 g/l.

    摘要翻译: 一种通过以下步骤制备羧酸酯的方法:a)制备含有醇和羧酸和/或羧酸酐和/或羧酸酯和/或部分酯化的羧酸的反应混合物,b)加热 该混合物在不溶于反应介质的固体聚硅氧烷存在下具有适当的反应温度,并且具有强烈浓缩的磺酸基团,伴随着形成的反应水的连续分离,其中用作催化剂的聚硅氧烷被改性为 用可溶性铝,钛或锆化合物处理,其球形颗粒的直径为0.01〜3mm,比表面积为0.1〜1200m2 / g,比孔体积为0.01〜6.0ml / g,体积 密度为50〜1000g / l。

    Process for the hydriding of halogen-substituted compounds
    4.
    发明授权
    Process for the hydriding of halogen-substituted compounds 失效
    氢化取代的化合物的方法

    公开(公告)号:US5126473A

    公开(公告)日:1992-06-30

    申请号:US565433

    申请日:1990-08-10

    摘要: A process is described for the hydrided of halogen-substituted compounds of the second to fourth period of Groups III to V of the periodic system, with the exception of gallium, aluminum, carbon, or nitrogen. A finely-granulated aluminum is added to a molten salt melt that consists of 50-67 molar % AlCl.sub.3 (anhydrous) and 50 to 33 molar % of sodium chloride. Then to the stirred, or by some other means dispersed suspension, hydrogen is introduced to hydrided the finely-dispersed aluminum. Thereafter the mixture is reacted with the halogen-substituted compound and the resulting hydrided compound is renewed.

    摘要翻译: 描述了除了镓,铝,碳或氮之外,周期性系的第III至V族的第二至第四周期的卤素取代的化合物的氢化方法。 将细粒状的铝加入由50-67摩尔%AlCl 3(无水)和50-33摩尔%氯化钠组成的熔融盐熔体中。 然后通过搅拌或通过其它方式分散悬浮液,引入氢气使细分散的铝水合。 然后将混合物与卤素取代的化合物反应,并且更新所得的氢化化合物。

    Method for the production of catalytically active coatings for the
production of hydrogen cyanide
    5.
    发明授权
    Method for the production of catalytically active coatings for the production of hydrogen cyanide 失效
    生产氰化氢催化活性涂料的方法

    公开(公告)号:US5039643A

    公开(公告)日:1991-08-13

    申请号:US550746

    申请日:1990-07-10

    摘要: A method for the production of catalytically active coatings on shaped articles of aluminum oxide for the production of hydrogen cyanide according to the BMA method. A suspension is used for the coating which suspension contains at least one platinum metal and aluminum in finely divided elementary form in a carrier liquid. According to especially preferred embodiments, the suspension additionally contains glass frits or organic silicon compounds. After the moistening of the shaped article and evaporation of the carrier liquid, the catalyst is formed during heating to 1000.degree. to 1350.degree. C. in the presence of nitrogen and/or ammonia.Essential advantages of the method over the previously known method of coating with solutions of Pt and Al compounds are: the application of different coating thicknesses are possible in a single coating stage, the previously-necessary hydrogenation stage after each impregnation is eliminated and the health risk is reduced.

    摘要翻译: 根据BMA方法生产氰化氢的成型制品上的催化活性涂层的方法。 悬浮液用于涂层,该悬浮液在载体液体中含有至少一种细金属元素形式的铂金属和铝。 根据特别优选的实施方案,悬浮液另外含有玻璃料或有机硅化合物。 在成型制品的润湿和载液的蒸发之后,在氮和/或氨的存在下加热至1000℃至1350℃期间形成催化剂。 该方法相对于先前已知的Pt和Al化合物溶液涂布方法的重要优点是:在单一涂层阶段可以应用不同的涂层厚度,每次浸渍后先前必要的氢化步骤被消除,并且健康风险 降低了。

    Metal-containing, shaped organosiloxane amine copolycondensates and
methods of their production
    10.
    发明授权
    Metal-containing, shaped organosiloxane amine copolycondensates and methods of their production 失效
    含金属的成型有机硅氧烷胺共缩聚物及其制备方法

    公开(公告)号:US5264514A

    公开(公告)日:1993-11-23

    申请号:US860715

    申请日:1992-04-01

    摘要: Shaped organosiloxane amine copolycondensates are described which contain Pd, Pt, Ru and/or Rh, as well as optional promotors and/or moderators. The shaped copolycondensate function as a carrier for metals and are made up of units of: ##STR1## and/or units of Y--R.sup.6. R.sup.2 to R.sup.6 are a group represented by the formula: ##STR2## wherein R.sup.7 is a group bound to N, X, or Y (for example, an alkylene group) and R.sup.1 is R.sup.7 --SiO.sub.3/2, H, CH.sub.3, C.sub.2 H.sub.5, or C.sub.3 H.sub.7. X stands for a double-bonded group such as --S--, --S.sub.2 --, --S.sub.3 --, --S.sub.4 --, --HN--CS--NH-- and Y stands for a monovalent groups such as --CN, --SCN, --SH, --S--CH.sub.3, --NH.sub.2, --NH--(CH.sub.2).sub.2 --NH.sub.2. The carrier substance may be cross-linked with cross-linking agents containing Si, Ti, Zr or Al. The metal-containing product is spherical in form and is defined by the parameters of sphere diameter, specific surface and pore volume as well as bulk density. Methods of production and use of the copolycondensates are also described.

    摘要翻译: 描述了含有Pd,Pt,Ru和/或Rh的有机硅氧烷胺共缩合物,以及任选的促进剂和/或调节剂。 成型的共缩聚物用作金属载体,由以下单元组成:< IMAGE>和/或Y-R6单元。 R2至R6是由下式表示的基团:其中R7是与N,X或Y结合的基团(例如亚烷基),R1是R7-SiO3/2,H,CH3 ,C 2 H 5或C 3 H 7。 X表示-S-,-S2-,-S3-,-S4-,-HN-CS-NH-和Y代表一价基团如-CN,-SCN,-SH ,-S-CH 3,-NH 2,-NH-(CH 2)2 -NH 2。 载体物质可以与含有Si,Ti,Zr或Al的交联剂交联。 含金属产品的形状为球形,由球体直径,比表面积和孔体积以及堆积密度的参数定义。 还描述了共缩聚物的生产和使用方法。