利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

7 条记录 (耗时 0.013 秒)

    Method of preparing aminoacetaldehyde acetals by the hydrogenation of dialkoxyacetonitrile
    1.
    发明授权
    Method of preparing aminoacetaldehyde acetals by the hydrogenation of dialkoxyacetonitrile 失效
    通过二烷氧基乙腈氢化制备氨基乙醛缩醛的方法

    公开(公告)号：US4137268A

    公开(公告)日：1979-01-30

    申请号：US717789

    申请日：1976-08-25

    申请人： Gerhard Daum ,  Wilhelm Vogt

    发明人： Gerhard Daum ,  Wilhelm Vogt

    IPC分类号： C07C217/40 ,  C07C20060101 ,  C07C41/00 ,  C07C43/30 ,  C07C85/12

    CPC分类号： C07C209/48

    摘要： A process for the preparation of an aminoacetaldehyde acetal of the formula ##STR1## wherein R is a saturated branched or unbranched alkyl radical of 1 to 4 carbon atommsBy contacting a dialkoxyacetonitrile of the formula ##STR2## wherein R has the same meaning with hydrogen at an elevated pressure and at a temperature of 50-180.degree. C., preferably in the presence of a catalyst and preferably in the presence of ammonia.

    摘要翻译： 制备式IMAMA的氨基乙醛缩醛的方法，其中R是1至4个碳原子的饱和支链或非支链烷基。通过接触式I的二烷氧基乙基酮，其中R与氢具有相同的含义 压力升高，温度在50-180℃，优选在催化剂存在下，优选在氨存在下。

    Process for the preparation of substituted acetic acids and derivatives thereof
    2.
    发明授权
    Process for the preparation of substituted acetic acids and derivatives thereof 失效
    取代乙酸及其衍生物的制备方法

    公开(公告)号：US4417073A

    公开(公告)日：1983-11-22

    申请号：US324929

    申请日：1981-11-25

    申请人： Otto Ackermann ,  Gerhard Daum

    发明人： Otto Ackermann ,  Gerhard Daum

    IPC分类号： C07C69/22 ,  B01J21/00 ,  B01J21/12 ,  B01J23/00 ,  C07B61/00 ,  C07C51/00 ,  C07C51/38 ,  C07C53/122 ,  C07C53/124 ,  C07C53/126 ,  C07C53/128 ,  C07C57/30 ,  C07C59/64 ,  C07C67/00 ,  C07C67/32 ,  C07C69/24 ,  C07C69/612 ,  C07C69/614 ,  C07C69/736 ,  C07C253/00 ,  C07C253/30 ,  C07C255/03 ,  C07C255/33 ,  C07C255/37 ,  C07C69/76

    CPC分类号： C07C253/30 ,  C07C51/38

    摘要： A process for the preparation of substituted acetic acids and derivatives thereof, having the formula ##STR1## wherein X is --COOH, --COOY or --CN,Y is --CH.sub.3 or --C.sub.2 H.sub.5,R.sub.1 is a saturated, branched or unbranched aliphatic radical having from 1 to 6 carbon atoms, a phenyl radical, or a phenyl radical substituted by alkyl or alkoxy groups, andR.sub.2 is hydrogen or a saturated, branched or unbranched aliphatic radical having from 1 to 6 carbon atoms, a phenyl radical, or a phenyl radical substituted by alkyl or alkoxy groups,wherein R.sub.1 and R.sub.2 may be the same or different which process comprises converting the corresponding malonic or cyanoacetic ester of the formula ##STR2## wherein Z is --COOY or --CN, andY, R.sub.1 and R.sub.2 are identified as above at elevated temperature in the presence of a catalyst, e.g., a catalyst containing from about 50 to 75 weight percent SiO.sub.2 and from 15 to 19 weight percent Al.sub.2 O.sub.3 and exhibit ignition losses ranging from 15 to 20 weight percent.

    摘要翻译： 具有式（I）的取代的乙酸及其衍生物的方法，其中X是-COOH，-COOY或-CN，Y是-CH 3或-C 2 H 5，R 1是饱和的，支链的或未分支的 具有1至6个碳原子的脂族基团，苯基或被烷基或烷氧基取代的苯基，R 2是氢或具有1至6个碳原子的饱和，支链或非支链脂族基团，苯基， 或被烷基或烷氧基取代的苯基，其中R 1和R 2可以相同或不同，该方法包括将其中Z为-COOY或-CN的式Ⅹ（II）的相应的丙二酸或氰基乙酸酯转化为 Y，R1和R2如上所述在升高的温度下在催化剂存在下进行鉴定，例如含有约50-75％（重量）SiO 2和15- 19％（重量）Al 2 O 3的催化剂，并显示出15至20重量％的点火损失 百分。

    Process for the preparation of terephthalic, isophthalic and phthalic dialdehydes
    3.
    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

    申请人： Gunther Bernhardt ,  Gerhard Daum

    发明人： Gunther Bernhardt ,  Gerhard Daum

    IPC分类号： C07C47/544 ,  C07C45/00 ,  C07C45/38 ,  C07C67/00 ,  C07C45/29

    CPC分类号： C07C45/38

    摘要： 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.

    摘要翻译： 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。

    Method of preparing orthoacetic acid alkyl esters
    4.
    发明授权
    Method of preparing orthoacetic acid alkyl esters 失效
    正乙酸烷基酯的制备方法

    公开(公告)号：US4182910A

    公开(公告)日：1980-01-08

    申请号：US840186

    申请日：1977-10-06

    申请人： Hans-Georg Schmidt ,  Gerhard Daum ,  Wilhelm Vogt

    发明人： Hans-Georg Schmidt ,  Gerhard Daum ,  Wilhelm Vogt

    IPC分类号： B01J31/00 ,  C07B61/00 ,  C07C41/00 ,  C07C41/60 ,  C07C43/32 ,  C07C67/00

    CPC分类号： C07C41/60

    摘要： An improvement in the process for preparing an orthoacetic acid alkyl ester of the formula ##STR1## wherein R is a saturated, branched or un-branched, alkyl moiety of 1 to 8 carbon atoms by:(a) contacting acetonitrile with an anhydrous alkanol having 1 to 8 carbon atoms and dry hydrogen chloride in the presence of an organic solvent to prepare the corresponding imidoester hydrochloride;(b) thereafter contacting said imidoester hydrochloride in the acid-free state with an alkanol having 1 to 8 carbon atoms; and(c) removing by-product ammonium chloride from the resultant reaction mixture and distilling the reaction mixture to recover orthoacetic acid alkyl ester, the improvement residing in(d) employing as the organic solvent an inert solvent having a dielectric constant measured at 25.degree. C. of 2.6 or less; and(e) contacting said imidoester hydrochloride in step (b) with an alkali metal or alkaline earth metal alcoholate before contacting the same with said alkanol.Also disclosed is a process in which steps (a) and (b) are performed coterminously without isolation or recovery of the intermediate imidoester hydrochloride.

    摘要翻译： 制备式“IMAGE”的正乙酸烷基酯的方法的改进，其中R是1至8个碳原子的饱和，支化或未支化的烷基部分，通过：（a）使乙腈与具有 1至8个碳原子和干氯化氢，在有机溶剂存在下制备相应的酰亚胺盐酸盐; （b）然后将无酸状态的所述酰亚胺酯盐酸盐与具有1至8个碳原子的链烷醇接触; 和（c）从所得反应混合物中除去副产物氯化铵并蒸馏反应混合物以回收正乙酸烷基酯，改进在（d）使用在25℃下测量的介电常数的惰性溶剂作为有机溶剂 2.6以下; 和（e）使步骤（b）中的所述酰亚胺酯盐酸盐与碱金属或碱土金属醇化物接触，然后使其与所述链烷醇接触。 还公开了步骤（a）和（b）在不分离或回收中间体酰亚胺盐酸盐的情况下共同进行的方法。

    Process for preparing benzylalcohols
    7.
    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

    申请人： Gunther Bernhardt ,  Gerhard Daum

    发明人： Gunther Bernhardt ,  Gerhard Daum

    IPC分类号： C07C27/02 ,  C07B31/00 ,  C07B41/02 ,  C07C27/00 ,  C07C29/128 ,  C07C31/18 ,  C07C67/00 ,  C07C67/03

    CPC分类号： C07C29/1285 ,  C07C67/03

    摘要： 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.

    摘要翻译： 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。