公开(公告)号：US5439661A

公开(公告)日：1995-08-08

申请号：US330202

申请日：1994-10-27

申请人： Takafumi Abe ,  Shuji Ebata ,  Kazuhiro Sugamura ,  Taiji Matsuzaki ,  Hirofumi Higuchi

发明人： Takafumi Abe ,  Shuji Ebata ,  Kazuhiro Sugamura ,  Taiji Matsuzaki ,  Hirofumi Higuchi

IPC分类号： C01C3/02

CPC分类号： C01C3/0204

摘要： There is disclosed a process for efficiently producing hydrogen cyanide at a reaction temperature of preferably 250.degree. to 550.degree. C. by a catalytic dehydrative reaction of formamide which comprises employing as a catalyst, a manganese oxide (MnO) and/or a magnesium oxide (MgO) each modified with an alkali metal (Na, K, Rb, Cs, etc. ). The above process is capable of producing hydrogen cyanide at an enhanced conversion efficiency of formamide and at a high selectivity while minimizing the by-production of ammonia. The use of the catalyst comprising as a principal component, MnO modified with an alkali metal is particularly effective in prolonging its service life and enables a long-term stable operation.

摘要翻译： 公开了通过甲酰胺的催化脱氢反应在优选250-550℃的反应温度下有效地生产氰化氢的方法，该方法包括使用氧化锰（MnO）和/或氧化镁（MnO） MgO），其用碱金属（Na，K，Rb，Cs等）修饰。 上述方法能够以提高甲酰胺的转化效率并以高选择性产生氰化氢，同时最小化氨的副产物。 使用以碱金属为主成分的催化剂MnO特别有效延长其使用寿命，能够长期稳定运行。

公开(公告)号：US20060111576A1

公开(公告)日：2006-05-25

申请号：US11268583

申请日：2005-11-08

申请人： Taiji Matsuzaki

发明人： Taiji Matsuzaki

IPC分类号： C07D301/27 ,  C07C69/52

CPC分类号： C07D301/24

摘要： In the production of glycidyl methacrylate from an alkali metal salt of methacrylic acid and epichlorohydrin, at least one water-soluble polymerization inhibitor is added at an appropriate stage of the production. The addition of the water-soluble polymerization inhibitor prevents the formation of insoluble solid matters to increase the efficiency of phase separation in the washing operation for removing a by-produced salt and form a clear interface between the phases, thereby minimizing the recovery loss. In addition, the troubles such as clogging of pipe lines of production apparatus and equipment for waster water treatment can be avoided.

摘要翻译： 在由甲基丙烯酸和表氯醇的碱金属盐制备甲基丙烯酸缩水甘油酯时，在生产的适当阶段加入至少一种水溶性阻聚剂。 水溶性聚合抑制剂的添加防止形成不溶性固体物质，以提高除去副产物的洗涤操作中的相分离效率，并在相之间形成清晰的界面，从而使回收损失最小化。 此外，可以避免诸如生产设备的管道堵塞以及用于废水处理的设备的麻烦。

公开(公告)号：US07176328B2

公开(公告)日：2007-02-13

申请号：US11268583

申请日：2005-11-08

申请人： Taiji Matsuzaki

发明人： Taiji Matsuzaki

IPC分类号： C07C69/52 ,  C07D30/27

CPC分类号： C07D301/24

摘要： In the production of glycidyl methacrylate from an alkali metal salt of methacrylic acid and epichlorohydrin, at least one water-soluble polymerization inhibitor is added at an appropriate stage of the production. The addition of the water-soluble polymerization inhibitor prevents the formation of insoluble solid matters to increase the efficiency of phase separation in the washing operation for removing a by-produced salt and form a clear interface between the phases, thereby minimizing the recovery loss. In addition, the troubles such as clogging of pipe lines of production apparatus and equipment for waster water treatment can be avoided.

摘要翻译： 在由甲基丙烯酸和表氯醇的碱金属盐制备甲基丙烯酸缩水甘油酯时，在生产的适当阶段加入至少一种水溶性阻聚剂。 水溶性聚合抑制剂的添加防止形成不溶性固体物质，以提高除去副产物的洗涤操作中的相分离效率，并在相之间形成清晰的界面，从而使回收损失最小化。 此外，可以避免诸如生产设备的管道堵塞以及用于废水处理的设备的麻烦。