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公开(公告)号:US07525001B2
公开(公告)日:2009-04-28
申请号:US11065035
申请日:2005-02-25
申请人: Young Gyu Kim , Woon Ki Kim , Byung Hyun Kim , Jong Gil Lee
发明人: Young Gyu Kim , Woon Ki Kim , Byung Hyun Kim , Jong Gil Lee
CPC分类号: C07C29/17 , C07C1/24 , C07C5/367 , C07C13/48 , C07C15/24 , C07C29/141 , C07C29/32 , C07C33/20 , C07C2521/02 , C07C2521/06 , C07C2527/054 , C07C2527/08 , C07C2527/11 , C07C2527/1206 , C07C2527/128 , C07C2527/135 , C07C2527/138 , C07C2527/173 , C07C2531/08 , C07C2602/10 , C07C33/30
摘要: The present invention provides a novel process for highly selective preparation of 2,6-dialkyltetralin, a key precursor for 2,6-dimethylnaphthalene (2,6-DMN), which does not require an extra step for purifying various isomers obtained from the conventional processes for 2,6-DMN. The present invention is advantageous to improve the synthetic yield, to simplify the operation and thus to reduce the production cost, since different starting materials and different pathways are exploited and thus the additional steps are not necessary.
摘要翻译: 本发明提供了一种用于高选择性制备2,6-二烷基四氢萘的新方法,2,6-二烷基四烯是2,6-二甲基萘(2,6-DMN)的关键前体,其不需要额外的步骤来纯化由常规 2,6-DMN的过程。 本发明有利于提高合成产率,简化操作并因此降低生产成本,因为不同的起始材料和不同的途径被利用,因此不需要额外的步骤。
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公开(公告)号:US06774516B2
公开(公告)日:2004-08-10
申请号:US10401929
申请日:2003-03-28
申请人: Woon Ki Kim
发明人: Woon Ki Kim
IPC分类号: H02K1100
CPC分类号: F16C43/02 , F16C17/102 , F16C33/103 , F16C2300/12 , F16C2380/26 , H02K5/1675
摘要: Disclosed is a sealing structure for a motor using a kinetic pressure bearing, capable of improving productivity by reducing assembling time through modification in the sealing structure of the bearing, and of extending life of a motor, improving performance of a motor by more effectively preventing leakage of an oil in the interior of the bearing, to the outside.
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