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公开(公告)号：US06528025B1
公开(公告)日：2003-03-04
申请号：US09606918
申请日：2000-06-29
IPC分类号： B01J1000
CPC分类号： B01D61/362 , C07C41/56 , C07C41/58 , C07C43/303
摘要： A process for the preparation of acetals and ketals by reacting an aldehyde or Ketone with an alcohol in the presence of solid acid and removing water by pervaporation. Manufacturing equipment for the preparation of acetals and ketones is also provided.
摘要翻译： 通过在固体酸存在下使醛或酮与醇反应并通过全蒸发除去水来制备缩醛和缩酮的方法。 还提供了用于制备缩醛和酮的制造设备。
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公开(公告)号：US06806392B2
公开(公告)日：2004-10-19
申请号：US10290018
申请日：2002-11-07
IPC分类号： C07C4330
CPC分类号： B01D61/362 , C07C41/56 , C07C41/58 , C07C43/303
摘要： A process for the preparation of acetals and ketals by reacting an aldehyde or ketone with an alcohol in the presence of an acidic catalyst and removing water by pervaporation. Manufacturing equipment for the preparation of acetals and ketones is also provided.
摘要翻译： 通过在酸性催化剂存在下使醛或酮与醇反应并通过全蒸发除去水来制备缩醛和缩酮的方法。 还提供了用于制备缩醛和酮的制造设备。
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公开(公告)号：US5892058A
公开(公告)日：1999-04-06
申请号：US848041
申请日：1997-04-28
IPC分类号： B01J21/02 , C07B61/00 , C07D311/72 , C07D311/04
CPC分类号： C07D311/72 , Y02P20/582
摘要： A method of producing .alpha.-tocopherol from non-.alpha.-tocopherols is disclosed. In the disclosed method, non-.alpha.-tocopherols are hydroxymethylated and reduced to .alpha.-tocopherol in a single step by reacting formaldehyde or a formaldehyde-producing compound with the non-.alpha.-tocopherol under catalytic reducing conditions in a reaction mixture containing the non-.alpha.-tocopherol, formaldehyde or formaldehyde-producing compound and boric acid or a boric acid-producing compound dispersed in a solvent of an azeotropic mixture of trimethyl borate and methanol and a non-polar organic solvent.
摘要翻译： 公开了一种从非α-生育酚生产α-生育酚的方法。 在所公开的方法中，非α-生育酚被羟甲基化并在一个步骤中通过使甲醛或产生甲醛的化合物与非α-生育酚在催化还原条件下在含有非α-生育酚的反应混合物中反应而被还原成α-生育酚， α-生育酚，甲醛或生产甲醛的化合物和分散在硼酸三甲酯和甲醇和非极性有机溶剂的共沸混合物的溶剂中的硼酸或硼酸生成化合物。
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