利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

618 条记录 (耗时 0.019 秒)

    Production of 2,2-disubstituted propiolactones
    101.
    发明授权
    Production of 2,2-disubstituted propiolactones 失效
    2,2-二取代丙内酯的制备

    公开(公告)号：US3927035A

    公开(公告)日：1975-12-16

    申请号：US30356872

    申请日：1972-11-03

    申请人： EASTMAN KODAK CO

    发明人： HOLMES JERRY D

    IPC分类号： B01J23/14 ,  C07D315/00 ,  C07D305/12

    CPC分类号： C07D315/00 ,  B01J23/14

    摘要： The present invention relates to a process for the manufacture of 2,2-disubstituted propiolactones from isoanhydrides and formaldehyde, as shown in the following equation:

    wherein R and R1 individually may be a straight or branched chain alkyl, aryl, or aralkyl group having 1 to 10 carbon atoms. The reaction is conducted in the presence of a catalyst comprising a complex of tin oxide and silica gel at a temperature of from about 190*C. to about 400*C.

    摘要翻译： 本发明涉及一种由异酐和甲醛制备2,2-二取代丙内酯的方法，如下式所示：OO H R 1 R 2 R 2 R 2和R 2分别为C 1 -C 10 - 其中R和R 1各自可以是具有1-10个碳原子的直链或支链烷基，芳基或芳烷基，其中R 1和R 2各自独立地为具有1-10个碳原子的直链或支链烷基，芳基或芳烷基。 反应在含有氧化锡和硅胶复合物的催化剂存在下，在约190℃至约400℃的温度下进行。

    Method of catalyst manufacture
    102.
    发明授权
    Method of catalyst manufacture 失效

    公开(公告)号：US3926849A

    公开(公告)日：1975-12-16

    申请号：US47811574

    申请日：1974-06-10

    申请人： UNIVERSAL OIL PROD CO

    发明人： MICHALKO EDWARD

    IPC分类号： B01J23/14 ,  B01J23/62 ,  C10G35/09 ,  B01J37/00 ,  B01J21/04

    CPC分类号： C10G35/09 ,  B01J23/14 ,  B01J23/626

    摘要： A method of catalyst manufacture. Stannic chloride is partially hydrolyzed, admixed with an alumina sol, and the mixture gelled to form a tin-containing alumina suitable for use as a catalyst or as a catalyst support or carrier material. The method is particularly useful in the manufacture of a reforming catalyst comprising a platinum component impregnated on an alumina carrier material comprising up to about 30 wt. percent tin as stannic oxide.

    Methylation of phenols at ortho-position
    104.
    发明授权
    Methylation of phenols at ortho-position 失效
    苯甲酸甲酯在正交位置

    公开(公告)号：US3790641A

    公开(公告)日：1974-02-05

    申请号：US3790641D

    申请日：1971-05-11

    申请人： KANEGAFUCHI CHEMICAL IND

    发明人： KOMBASHIRI T ,  OSHIMA A ,  OSHIMA H

    IPC分类号： B01J23/12 ,  B01J23/14 ,  C07C37/16

    CPC分类号： B01J23/12 ,  B01J23/14 ,  C07C37/16 ,  C07C39/07

    摘要： PHENOL, CRESOL OR THE LIKE PHENOLS EACH HAVING AT LEAST ONE HYDROGEN ATOM AT ORTHO-POSITION, IS METHYLATED AT ORTHO-POSITION THEREOF IN HIGH SELECTIVITY BY REACTING WITH METHANOL USING A NOVEL CATALYST SYSTEM SELECTED FROM THE LEAST ONE OF THE FOLLOWING GROUPS (A), (B) AND (C): (A) A COMBINATION OF AT LEAST ONE OF MAGNESIUM OXIDE, ZINC OXIDE AND BERYLLIUM OXIDE, AT LEAST ONE OF LATHANIDE OXIDE, SCANDIUM OXIDE AND YTTRIUM OXIDE, AND AT LEAST ONE OF URANIUM OXIDE AND TIN OXIDE; (B) A COMBINATION OF AT LEAST ONE OF SCANDIUM OXIDE, YTTRIUM OXIDE AND LANTHANIDE OXIDE, AND TIN OXIDE; AND (C) A COMBINATION OF AT LEAST ONE OF URANIUM OXIDE AND LANTHANIDE OXIDE, AND ACTIVE CARBON.