公开(公告)号：US5233054A

公开(公告)日：1993-08-03

申请号：US721004

申请日：1991-06-26

申请人： David Y. Tang ,  Mary K. Cocoman ,  Harry E. Buckholtz

发明人： David Y. Tang ,  Mary K. Cocoman ,  Harry E. Buckholtz

IPC分类号： C07C51/377 ,  C07C51/567 ,  C07C253/30

CPC分类号： C07C253/30 ,  C07C51/377 ,  C07C51/567

摘要： Halophthalic anhydrides are prepared by the liquid phase reaction of a brominating agent with halogen substituted hexa- or tetra-hydrophthalic anhydrides.

摘要翻译： 卤代邻苯二甲酸酐通过溴化剂与卤素取代的六 - 或四 - 邻苯二甲酸酐的液相反应来制备。

公开(公告)号：US5171828A

公开(公告)日：1992-12-15

申请号：US739954

申请日：1991-08-05

申请人： Timothy A. Meterko ,  Rudolph F. Mundhenke ,  Willis T. Schwartz

发明人： Timothy A. Meterko ,  Rudolph F. Mundhenke ,  Willis T. Schwartz

IPC分类号： C08G73/10 ,  H01L23/14

CPC分类号： C08G73/1071 ,  C08G73/1042 ,  C08G73/1067 ,  H01L23/145 ,  H01L2924/0002 ,  Y10T428/28 ,  Y10T428/2852 ,  Y10T428/2896 ,  Y10T428/294 ,  Y10T428/31681 ,  Y10T428/31721

摘要： Polyimide copolymers are disclosed having the recurring structure ##STR1## wherein AR is AR.sub.1 or AR.sub.2, wherein AR.sub.1 is ##STR2## and wherein AR.sub.2 is ##STR3## provided that the molar ratio of AR.sub.1 to AR.sub.2 is 3:1 to 1:3, and wherein AR.sub.3 is ##STR4## These polyimides have unexpected properties which are useful in various electronic applications.

摘要翻译： 公开了具有重复结构“IMAGE”的聚酰亚胺共聚物，其中AR为AR1或AR2，其中AR1为“IMA”，其中AR2为“IMA”，条件是AR1与AR2的摩尔比为3：1至1：3， 其中AR 3是这些聚酰亚胺具有意想不到的性质，其可用于各种电子应用。

公开(公告)号：US5133947A

公开(公告)日：1992-07-28

申请号：US487313

申请日：1990-03-02

申请人： Edgel P. Stambaugh ,  Russell J. Morgan

发明人： Edgel P. Stambaugh ,  Russell J. Morgan

IPC分类号： C01B31/00 ,  B22F9/24 ,  C01G37/02 ,  C22B34/32

CPC分类号： C22B34/32 ,  B22F9/24 ,  C01G37/02 ,  C01P2002/85 ,  C01P2004/03 ,  C01P2006/80

摘要： Disclosed is a method of making particle which comprise hydrous trivalent chromium oxide having the empirical formula CrO.sub.2 H intimately associated with a pulverulent carbonaceous substrate. A composition is formed which comprises an aqueous solution of water-soluble hexavalent chromium compound and a reducing agent in an amount sufficient to reduce the hexavalent chromium compound to the hydrous trivalent chromium oxide and to reduce the hydrous trivalent chromium oxide to metallic chromium. The reducing agent comprises a water-insoluble pulverulent carbonaceous substrate. Chrome metal can be made by heating the particles at a temperature of about 1100.degree. to about 1400.degree. C.

公开(公告)号：US5126497A

公开(公告)日：1992-06-30

申请号：US718695

申请日：1991-06-21

申请人： Ronald F. Spohn ,  Raymond T. Olczak

发明人： Ronald F. Spohn ,  Raymond T. Olczak

IPC分类号： C07C17/00

CPC分类号： C07C17/35

摘要： A partially deactivated reduction catalyst is prepared by reacting palladium on alumina catalyst with benzotrifluoride in an amount of 0.1 to 10.0 millimoles of benzotrifluoride per gram of alumina and hydrogen in an amount ranging from 10 to 2000 moles of hydrogen per mole of benzotrifluoride at a temperature of 200.degree. C. to 300.degree. C. for 30 minutes to 2 hours. The catalyst is useful for the reduction of trifluoromethylbenzonitriles and trifluoromethylbenzylamines to produce the corresponding trifluoromethyltoluenes in high yields. The catalyst is also useful in other hydrogen reduction reactions, e.g., for conversion of o-chlorobenzonitrile, o-chlorobenzylamine and mandelonitrile to toluene and for conversion of phenethylamine to ethylbenzene.

摘要翻译： 部分失活的还原催化剂是通过使钯/氧化铝催化剂与每摩尔氧化铝为0.1至10.0毫摩尔的三氟甲苯的量和每摩尔三氟甲苯的10至2000摩尔氢的量反应制备的，温度为 在200℃至300℃下搅拌30分钟至2小时。 催化剂可用于还原三氟甲基苯腈和三氟甲基苄胺以高产率生成相应的三氟甲基甲苯。 催化剂也可用于其它氢还原反应，例如用于将邻氯苄腈，邻氯苄胺和扁桃腈转化成甲苯，以及将苯乙胺转化为乙苯。

公开(公告)号：US5122613A

公开(公告)日：1992-06-16

申请号：US708319

申请日：1991-05-31

申请人： Robert A. Buchanan ,  Robert L. Ostrozynski ,  Henry C. Lin

发明人： Robert A. Buchanan ,  Robert L. Ostrozynski ,  Henry C. Lin

IPC分类号： C07D207/452 ,  C07D207/40 ,  C07D207/404 ,  C07D209/76 ,  C07D209/94 ,  C08G73/06 ,  C08G73/12

CPC分类号： C07D207/404 ,  C07D209/94

摘要： This invention relates to novel fluorinated N,N-bis-imides of the formula ##STR1## wherein R is a bivalent radical of the formula ##STR2## The compounds are particularly useful as monomers in the preparation of high performance polymer.

摘要翻译： 本发明涉及式（IMAGE）的新型氟化N，N-双酰亚胺，其中R是下式的二价基团。该化合物特别可用作制备高性能聚合物的单体。

公开(公告)号：US5108722A

公开(公告)日：1992-04-28

申请号：US572828

申请日：1990-08-27

申请人： Walter W. Ruthel ,  Tilak V. Bommaraju

发明人： Walter W. Ruthel ,  Tilak V. Bommaraju

IPC分类号： C01B11/14 ,  C25B15/08

CPC分类号： C01B11/14 ,  C25B15/08

摘要： Disclosed is a method of removing sulfate ion from an aqueous sodium chlorate liquor. A crystallization temperature is selected between about -15.degree. and about 0.degree. C. and the maximum concentration of sodium chlorate that is soluble in the liquor at that temperature is determined. The liquor is diluted so that the concentration of sodium chlorate in the liquor is less than that miximum concentration and the liquor is cooled to that temperature so that the sulfate ion in the liquor crystallizes as sodium sulfate decahydrate but the sodium chlorate does not crystallize.

摘要翻译： 公开了从氯酸钠水溶液中除去硫酸根离子的方法。 选择约-15℃至约0℃的结晶温度，并确定在该温度下可溶于液体中的氯酸钠的最大浓度。 将液体稀释，使得液体中氯酸钠的浓度小于该混合物的浓度，并将液体冷却至该温度，使得液体中的硫酸根离子以十水合硫酸钠结晶，但氯酸钠不结晶。

公开(公告)号：USRE33797E

公开(公告)日：1992-01-14

申请号：US655888

申请日：1991-02-15

申请人： Chung J. Lee

发明人： Chung J. Lee

IPC分类号： C08G73/10 ,  C08G77/455 ,  H01L21/312

CPC分类号： C08G77/455 ,  C08G73/106 ,  H01L21/3121

摘要： Substantially fully imidized polyimidesiloxanes which are based on a selected pyridine compound are soluble in diglyme which gives them particular utility in the micro-electronics industry. The polymers are prepared from the dianhydride, a difunctional siloxane monomer and an organic diamine that has the formula ##STR1## wherein X is hydrogen, halide, phenyl or combinations thereof, Z=--O--, --S--, ##STR2## >C(CX.sub.3).sub.2, --, or --Y--Ar--Y--. Ar= ##STR3## Y=--O--, --S--, ##STR4## >C(CH.sub.3).sub.2, or --. n=0 or 1.The preferred diamine has the formula ##STR5## Other diamines can be used to provide an asymmetrical structure in the polyimidesiloxane polymer chain. The polyimidesiloxane can be prepared with functional groups which render them directly curable. The polyimidesiloxanes can also be prepared with functional groups which when reacted with an unsaturated compound renders the polymers curable. The products of the invention can be used in the form of solutions in the micro-electronic industry. The polymers can also be used in wire and cable coating and to prepare films, fibers, and molded and extruded articles.

公开(公告)号：US5079390A

公开(公告)日：1992-01-07

申请号：US679848

申请日：1991-04-03

申请人： John J. Costanzo ,  Donald H. Marsden ,  Michael R. Yoder

发明人： John J. Costanzo ,  Donald H. Marsden ,  Michael R. Yoder

IPC分类号： H01H9/28

CPC分类号： H01H9/283

摘要： Disclosed is a device that can be placed on the lever arm of a switch and locked to prevent the switch from being turned on. The device comprises a rigid body having a clasping device for removably fixing the rigid body to the lever arm, an aperture through the rigid body in which the shackle of a lock can be placed, positioned so that when the shackle is in the aperture access to the clasping device is blocked, and a bracing portion which contacts the switch to prevent its lever arm from being rotated when the device is attached thereto.

摘要翻译： 公开了一种可以放置在开关的杠杆臂上并被锁定以防止开关被打开的装置。 该装置包括刚性体，该刚体具有用于将刚性体可移除地固定到杠杆臂的紧固装置，穿过刚性体的孔，其中可以放置锁的钩环，使得当钩环处于孔中时， 夹紧装置被阻挡，并且当装置附接到其上时，支撑部分接触开关以防止其杠杆臂旋转。

公开(公告)号：US4994606A

公开(公告)日：1991-02-19

申请号：US532764

申请日：1990-06-04

申请人： Lawrence B. Fertel ,  Henry C. Lin

发明人： Lawrence B. Fertel ,  Henry C. Lin

IPC分类号： C07C51/38

CPC分类号： C07C51/38 ,  C07C201/08 ,  C07C227/04

摘要： 4,5-Difluoroanthranilic acid may be prepared by decarboxylating 4,5-difluorophthalic anhydride or 4,5-difluorophthalic acid by heating in dimethyl acetamide, N-methyl-2-pyrrolidone or quinoline, optionally by reaction with copper, copper oxide, copper salts, or halides and salts of Zn, Cd, Ag and Ni as a catalyst, whereby 3,4-difluorobenzoic acid is formed; nitrating said 3,4-difluorobenzoic acid in a mixture of nitric and sulfuric acids to form 2-nitro-4,5-difluorobenzoic acid, and reducing said 2-nitro-4,5-difluorobenzoic acid to form 4,5-difluoroanthranilic acid.

摘要翻译： 可以通过在二甲基乙酰胺，N-甲基-2-吡咯烷酮或喹啉中加热，任选地通过与铜，氧化铜，铜的反应来使4,5-二氟邻苯二甲酸酐或4,5-二氟邻苯二甲酸脱羧来制备4,5-二氟邻氨基苯甲酸 盐，或卤化物和Zn，Cd，Ag和Ni的盐作为催化剂，由此形成3,4-二氟苯甲酸; 在硝酸和硫酸的混合物中硝化所述3,4-二氟苯甲酸以形成2-硝基-4,​​5-二氟苯甲酸，并将所述2-硝基-4,​​5-二氟苯甲酸还原形成4,5-二氟邻氨基苯甲酸 。

公开(公告)号：US4990670A

公开(公告)日：1991-02-05

申请号：US394986

申请日：1989-08-17

申请人： Jeffrey S. Stults ,  Henry C. Lin

发明人： Jeffrey S. Stults ,  Henry C. Lin

IPC分类号： B01J27/12 ,  C07B61/00 ,  C07C201/12 ,  C07C201/16 ,  C07C205/38 ,  C07C213/02 ,  C07C217/90

CPC分类号： C07C201/12 ,  C07C201/16 ,  C07C213/02

摘要： Disclosed is a method of making 1,1'-oxybis (3-nitro-5-trifluoromethyl)-benzene by heating a nitro benzofluoride compound having the formula ##STR1## where "X" is selected from the group consisting of NO.sub.2, Cl, and F, with an alkali metal fluoride selected from the group consisting of potassium fluoride, cesium fluoride, and mixtures thereof, in an organic solvent in the presence of water. The corresponding diamine, 5,5'-oxybis (3-trifluoromethyl)-benzamine, can be prepared by reducing the benzene compound.