公开(公告)号：US4766208A

公开(公告)日：1988-08-23

申请号：US883695

申请日：1986-07-08

申请人： Kiyomitsu Kunugiza ,  Kozo Kamiya

发明人： Kiyomitsu Kunugiza ,  Kozo Kamiya

IPC分类号： C07C59/215 ,  C07B31/00 ,  C07B33/00 ,  C07C51/00 ,  C07C51/29 ,  C07C67/00 ,  C07H9/04 ,  C07B41/00 ,  C07B45/00 ,  C07H15/16 ,  C07H15/20

CPC分类号： C07H9/04

摘要： A method of performing an oxidation reaction in which an alkali hypohalite is used as an oxidizing agent which comprises: carrying out the oxidation reaction in an aqueous medium with concurrently distilling off a solvent used in the reaction as the reaction proceeds under a reduced pressure.The method is in particular useful for the oxidation of diacetone-L-sorbose to diacetone-2-keto-L-gulonic acid in water. The reaction temperature is so accurately controlled that the same optimum yield of diacetone-2-keto-L-gulonic acid is obtained by the use of a reduced amount of sodium hypochlorite as compared with the conventional manner of reaction under atmospheric pressure.

摘要翻译： 一种进行氧化反应的方法，其中使用碱性次卤酸盐作为氧化剂，该方法包括：随着反应在减压下进行，同时蒸除反应中使用的溶剂，在水性介质中进行氧化反应。 该方法特别可用于将双丙酮-L-山梨糖氧化成双丙酮-2-酮-L-古洛糖酸在水中。 反应温度如此精确地控制，与通常的大气压反应方式相比，通过使用减少量的次氯酸钠可以获得相同的最佳产量的双丙酮-2-酮-L-古洛糖酸。

公开(公告)号：US4717697A

公开(公告)日：1988-01-05

申请号：US883120

申请日：1986-07-08

申请人： Kiyomitsu Kunugiza ,  Tadaaki Yamamoto ,  Hitoshi Sawada

发明人： Kiyomitsu Kunugiza ,  Tadaaki Yamamoto ,  Hitoshi Sawada

IPC分类号： B01J20/34 ,  C07C45/78 ,  C07C45/81 ,  B01J29/38 ,  B01D53/04 ,  B01J38/04 ,  C07C45/79

CPC分类号： C07C45/81 ,  B01J20/3408 ,  C07C45/78

摘要： A method of regenerating hydrous zeolite which contains acetone as well as water after having been used to dehydrate hydrous acetone of the invention which comprises: placing the hydrous zeolite in a closed system in which a heated inert gas is circulated at a pressure more than atmospheric pressures to bring the inert gas into contact with the hydrous zeolite to remove the acetone and water from the zeolite, and condensing the acetone and water in the closed system and removes them from the closed system.The method is in particular useful for regenerating hydrous zeolite which has been used to dehydrate hydrous acetone resulting from the reaction of L-sorbose with acetone to produce diacetone-L-sorbose, and which thus contains acetone as well as about 1000-4000 ppm of water therein.

摘要翻译： 在本发明的含水丙酮脱水后，再生含有丙酮以及水的含水沸石的方法，该方法包括：将含水沸石置于密闭系统中，其中加热的惰性气体在高于大气压的压力下循环 使惰性气体与含水沸石接触以从沸石中除去丙酮和水，并将封闭系统中的丙酮和水冷凝并将其从封闭系统中除去。 该方法特别可用于再生含水沸石，其用于使由L-山梨糖与丙酮反应产生的含水丙酮脱水以产生双丙酮-L-山梨糖，由此含有丙酮以及约1000-4000ppm的 水中。