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1. 发明授权

US5689012A Continuous preparation of low unsaturation polyoxyalkylene polyether polyols with continuous additon of starter 失效
标题翻译：连续添加起始剂连续制备低不饱和聚氧化烯聚醚多元醇
公开(公告)号：US5689012A
公开(公告)日：1997-11-18
申请号：US683356
申请日：1996-07-18
申请人： Jose F. Pazos , T. Thomas Shih
发明人： Jose F. Pazos , T. Thomas Shih
IPC分类号： C08G65/10 , C08G65/26 , C07C43/11
CPC分类号： C08G65/2663 , C08G65/2696
摘要： A continuous process for the preparation of polyoxyalkylene polyethers using DMC catalysts as the polyoxyalkylation catalyst employs continuous addition of alkylene oxide in conjunction with continuous addition of starter and catalyst to a continuous oxyalkylation reactor. Despite the continuous introduction of starter, the molecular weight distribution of the polyether product is quite narrow, as indicated by the exceptionally low polydispersity of the product. The presence of low molecular weight species during the majority of the polyoxyalkylation also substantially eliminates extremely high molecular weight fractions having molecular weights greater than 100,000 Da, again without appreciably broadening molecular weight distribution. By withdrawing intermediate molecular weight polyether product or diverting a portion of the end product to prepare a catalyst/starter mixture, rapid and sustained reaction rates can be achieved while employing low molecular weight starters. Continuous build ratios in excess of 0.98 can be achieved.
摘要翻译：使用DMC催化剂作为聚氧化烷基化催化剂制备聚氧化烯聚醚的连续方法是连续加入环氧烷，连续加入引发剂和催化剂至连续的烷氧基化反应器。尽管连续引入起始物，但聚醚产物的分子量分布相当窄，如产物的多分散性极差。在大部分聚氧化烷基化期间低分子量物质的存在也基本上消除了分子量大于100,000Da的极高分子量级分，同时又没有明显地扩大分子量分布。通过取出中间分子量聚醚产物或转移一部分最终产物以制备催化剂/起始混合物，可以在使用低分子量起始剂的同时实现快速和持续的反应速率。连续建造率可以达到0.98以上。

2. 发明授权

US5129996A Lower alkylene oxide purification 失效
公开(公告)号：US5129996A
公开(公告)日：1992-07-14
申请号：US681794
申请日：1991-04-08
申请人： T. Thomas Shih
发明人： T. Thomas Shih
IPC分类号： B01D3/40 , C07D301/32 , C07D303/04
CPC分类号： C07D301/32
摘要： A method is provided for the separation by extractive distillation of hydrocarbon impurities from lower alkylene oxides such as propylene oxide wherein a glycol having 2 to 5 carbon atoms is used as extractive solvent.

3. 发明授权

US5187287A Lower alkylene oxide purification 失效
标题翻译：较低的环氧烷净化
公开(公告)号：US5187287A
公开(公告)日：1993-02-16
申请号：US839985
申请日：1992-02-20
申请人： T. Thomas Shih
发明人： T. Thomas Shih
IPC分类号： C07D301/32
CPC分类号： C07D301/32
摘要： The method for the separating close-boiling impurities from C.sub.2 -C.sub.4 l alkylene oxide which comprises contacting the impure alkylene oxide with solid activated carbon adsorbent and separating alkylene oxide reduced in impurities content from the adsorbent.
摘要翻译：用于从C2-C4I环氧烷烃分离近沸点杂质的方法，其包括使不纯的环氧烷与固体活性炭吸附剂接触，并从吸附剂中分离出杂质含量减少的环氧烷烃。

4. 发明授权

US4918204A Tetrahydrofuran purification 失效
标题翻译：四氢呋喃净化
公开(公告)号：US4918204A
公开(公告)日：1990-04-17
申请号：US303325
申请日：1989-01-30
申请人： T. Thomas Shih , Te Chang
发明人： T. Thomas Shih , Te Chang
IPC分类号： C07D307/08
CPC分类号： C07D307/08
摘要： Purification of tetrahydrofuran from the dehydrocyclization of 1,4-butanediol in the presence of an organic acid catalyst has been accomplished by the extractive distillation of crude tetrahydrofuran containing water using monopropylene glycol as an extractive solvent.

5. 发明授权

US5352807A Propylene oxide purification 失效
标题翻译：环氧丙烷净化
公开(公告)号：US5352807A
公开(公告)日：1994-10-04
申请号：US147253
申请日：1993-11-04
申请人： T. Thomas Shih
发明人： T. Thomas Shih
IPC分类号： C07D301/32 , C07D303/04
CPC分类号： C07D301/32
摘要： The method for the separating close-boiling impurities from propylene oxide essentially free of high molecular weight poly (propylene oxide) which comprises contacting the impure propylene oxide with solid activated carbon adsorbent and separating propylene oxide reduced in impurities content from the adsorbent.
摘要翻译：用于从基本上不含高分子量聚（环氧丙烷）的环氧丙烷中分离近沸点杂质的方法包括使不纯的环氧丙烷与固体活性炭吸附剂接触，并从吸附剂中分离出杂质含量减少的环氧丙烷。

6. 发明授权

US5133839A Lower alkylene oxide purification 失效
标题翻译：较低的环氧烷净化
公开(公告)号：US5133839A
公开(公告)日：1992-07-28
申请号：US735574
申请日：1991-07-25
申请人： T. Thomas Shih
发明人： T. Thomas Shih
IPC分类号： C07D301/32
CPC分类号： C07D301/32 , Y10S203/20
摘要： The present invention provides an improved process for the separation of impurities from a lower alkylene oxide, such as propylene oxide, by a process wherein the impure propylene oxide is first fractionally distilled to separate higher and lower boiling impurities, then the partially purified alkylene oxide is subjected to extractive distillation to separate additional impurities, the purified propylene oxide being separated as an overhead fraction.
摘要翻译：本发明提供了一种改进的方法，用于通过以下方法从低级环氧烷如环氧丙烷中分离杂质，其中首先将不纯的环氧丙烷分馏以分离较高和较低沸点杂质，然后部分纯化的环氧烷烃是进行萃取蒸馏以分离另外的杂质，纯化的环氧丙烷作为塔顶馏分分离。

7. 发明授权

US5000825A Monoepoxide purification 失效
标题翻译：单环氧化物净化
公开(公告)号：US5000825A
公开(公告)日：1991-03-19
申请号：US533961
申请日：1990-06-06
申请人： T. Thomas Shih , John C. Jubin, Jr.
发明人： T. Thomas Shih , John C. Jubin, Jr.
IPC分类号： C07D301/32
CPC分类号： C07D301/32
摘要： A method is provided for the separation by extractive distillation of oxygenated impurities from a monoepoxide while avoiding epoxide loss, wherein lower glycol is used as extractive solvent in amounts so as to provide only up to about 0.3 mol % solvent in the vapor in the extractive distillation zone.
摘要翻译：提供了一种通过从单环氧化物萃取蒸馏氧化杂质同时避免环氧化物损失而分离的方法，其中低级二醇用作萃取溶剂，其用量在提取蒸馏中仅提供高达约0.3mol％的蒸汽中的溶剂区。

8. 发明授权

US5288882A Process for recovering an optically active epoxy alcohol 失效
标题翻译：回收光学活性环氧醇的方法
公开(公告)号：US5288882A
公开(公告)日：1994-02-22
申请号：US994030
申请日：1992-12-21
申请人： T. Thomas Shih , Wilfred P.-S. Shum
发明人： T. Thomas Shih , Wilfred P.-S. Shum
IPC分类号： C07D301/19 , C07D301/32 , C07D303/16 , C07D303/14
CPC分类号： C07D301/19 , C07D301/32 , C07D303/16
摘要： A method of recovering optically active epoxy alcohols from asymmetric epoxidation reaction mixture is provided whereby the epoxy alcohol may be obtained in high yield with minimal degradation of optical purity. The process is also suitable for the synthesis of useful organic sulfonate derivatives of chiral epoxy alcohols.
摘要翻译：提供从不对称环氧化反应混合物中回收光学活性环氧醇的方法，由此环氧醇可以以高收率获得，光学纯度降低最小。该方法也适用于手性环氧醇有用的有机磺酸酯衍生物的合成。

9. 发明授权

US5107002A Lower alkylene oxide purification 失效
标题翻译：低亚烷基氧化物纯化
公开(公告)号：US5107002A
公开(公告)日：1992-04-21
申请号：US623007
申请日：1990-12-06
申请人： T. Thomas Shih
发明人： T. Thomas Shih
IPC分类号： C07D301/32
CPC分类号： C07D301/32
摘要： The method for the separating methyl formate from lower alkylene oxide such as propylene oxide which comprises contacting the impure alkylene oxide with basic ion exchange resin and separating alkylene oxide reduced in methyl formate content.

10. 发明授权

US5006206A Propylene oxide purification 失效
标题翻译：环氧丙烷净化
公开(公告)号：US5006206A
公开(公告)日：1991-04-09
申请号：US491872
申请日：1990-03-12
申请人： T. Thomas Shih , William J. Sim
发明人： T. Thomas Shih , William J. Sim
IPC分类号： B01D3/40 , C07D301/32 , C07D303/04
CPC分类号： B01D3/40 , C07D301/32
摘要： A method is provided for the separation by extractive distillation of hydrocarbon impurities from propylene oxide wherein t-butyl alcohol/water is used as extractive distillation solvent.

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