公开(公告)号：US5196618A

公开(公告)日：1993-03-23

申请号：US843848

申请日：1992-02-28

申请人： Toshihiro Okon ,  Takaaki Shimizu

发明人： Toshihiro Okon ,  Takaaki Shimizu

IPC分类号： C07C17/16 ,  C07C19/03

CPC分类号： C07C19/03 ,  C07C17/16

摘要： An improvement is proposed in the method for the preparation of methyl chloride from carbon tetrachloride and methyl alcohol by the reaction including the partial reactions of, first, the hydrolysis reaction of carbon tetrachloride with water to form hydrogen chloride and carbon dioxide and, second, the reaction of methyl alcohol with hydrogen chloride, each in the presence of a solid catalyst of zinc chloride supported on active carbon. The uncontrollable temperature increase when these reactions are performed on a single catalyst bed can be avoided by conducting the first partial reaction in a first reaction zone with a feed of carbon tetrachloride and water alone and the second partial reaction is conducted in a separate second reaction zone into which the gaseous mixture from the first zone and methyl alcohol are introduced. When carbon dioxide in the gaseous mixture from the first zone is removed therefrom prior to introduction of the mixture into the second reaction zone, the problems accompanying the separation of carbon dioxide from a gaseous mixture containing methyl chloride can be solved.

摘要翻译： 在四氯化碳和甲醇中通过包括部分反应的四氯化碳与甲醇的制备方法提出了一个改进，首先是四氯化碳与水的水解反应形成氯化氢和二氧化碳，其次， 甲基醇与氯化氢的反应，各自在负载在活性炭上的氯化锌的固体催化剂存在下进行。 在单一催化剂床上进行这些反应时，不可控制的温度升高可以通过在第一反应区域中与四氯化碳和水单独进料进行第一部分反应来避免，第二部分反应在单独的第二反应区 其中引入来自第一区和甲醇的气体混合物。 在将混合物引入第二反应区之前，来自第一区的气态混合物中的二氧化碳被除去时，可以解决伴随着含有甲基氯的气态混合物分离二氧化碳的问题。

公开(公告)号：US5149748A

公开(公告)日：1992-09-22

申请号：US450822

申请日：1989-12-14

申请人： Takaaki Shimizu ,  Toshihiro Okon ,  Toshio Ohba ,  Yoshinori Inokuchi

发明人： Takaaki Shimizu ,  Toshihiro Okon ,  Toshio Ohba ,  Yoshinori Inokuchi

IPC分类号： C08G77/06 ,  C08J3/12

CPC分类号： C08J3/12 ,  C08G77/06 ,  C08J2383/04 ,  Y10T428/2998 ,  Y10T428/31663

摘要： The surface-modified polymethylsilsesquioxane spherical fine particles of this invention comprise polymethylsilsesquioxane spherical fine particles serving as nuclei, and at least one member of an alkyl group having two or more carbon atoms, an alkenyl group, a phenyl group, an epoxy group, an acryloxy group and an amino group is bonded to the surface of a particle. They are prepared by a process comprising the step of carrying out reaction in an aqueous suspension of polymethylsilsesquioxane fine particles in the presence of an alkali catalyst. The surface-modified spherical fine particles can have various organic groups on their surfaces, and are used in various fields such as rubbers, plastics, coating materials, inks, and cosmetics, depending on the types of the organic groups.

公开(公告)号：US4842837A

公开(公告)日：1989-06-27

申请号：US98301

申请日：1987-09-18

申请人： Takaaki Shimizu ,  Toshihiro Okon

发明人： Takaaki Shimizu ,  Toshihiro Okon

IPC分类号： B24B37/00 ,  B82Y30/00 ,  B82Y99/00 ,  C01B33/141 ,  C01B33/145 ,  C01B33/18 ,  C08G77/06 ,  C09K3/14

CPC分类号： B82Y30/00 ,  C01B33/141 ,  C01B33/145 ,  C01B33/181 ,  C01P2004/03 ,  C01P2004/32 ,  C01P2004/64 ,  C01P2006/80

摘要： A process for producing fine spherical silica, comprising a step of hydrolyzing an alkoxysilane in a mixed solution comprising water and alcohol and containing an alkaline catalyst, wherein the amount of said alkaline catalyst is 0.5 to 10 in molar ratio to the alkoxysilane used, the concentration of water in said mixed solution of water and alcohol in 5 to 20 mol/lit., and the reaction temperature for said hydrolysis is 30.degree. C. or more.According to this process, there can be obtained highly monodisperse spherical silica containing only a very small amount of impurities and having a particle size of 100 nm or less.

摘要翻译： 一种球形二氧化硅微球的制造方法，其特征在于，在水和醇的混合溶液中水解含有碱性催化剂的烷氧基硅烷的工序，其中所述碱性催化剂的摩尔比为0.5〜10，所用烷氧基硅烷的浓度为 的水和醇的混合溶液中的水分数为5〜20mol / l，所述水解的反应温度为30℃以上。 根据该方法，可以获得仅含有非常少量的杂质且粒径为100nm以下的高分子单分散球状二氧化硅。