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1. 发明授权

US4801763A Selective chlorination of chlorotrifluoroethylene telomers 失效
标题翻译：选择性氯化氯三氟乙烯调聚物
公开(公告)号：US4801763A
公开(公告)日：1989-01-31
申请号：US78327
申请日：1987-07-27
申请人： James J. Maul , Bobby F. Dannels , David Y. Tang
发明人： James J. Maul , Bobby F. Dannels , David Y. Tang
IPC分类号： C07C17/395 , C07C17/20 , C07C17/38 , C07C19/08 , C07G13/00
CPC分类号： C07C17/395
摘要： A process is disclosed for purifying and stabilizing a mixture of regular chlorotrifluoroethyelne telomers of formula RCXCl(CF.sub.2 CFCl).sub.n Br from bromine-containing irregular telomer impurities of similar molecular weight. The telomer mixture is produced by reacting chlorotrifluoroethylene with a telogen of formula RCXClBr, where R is CF.sub.2 Br, or Cl, and X is Cl or F. The telomer mixture is then chlorinated using either elevated temperature alone (100.degree. C.-350.degree. C.), or a combination of elevated temperatures (100.degree. C.-200.degree. C.) and light energy primarily of the wavelength region greater than about 3000.degree.A. Under these conditions, CFClBr telomer end group of the regular or normal telomer is chlorinated to form --CFCl.sub.2 end groups, while the bromine-containing irregular telomer impurities (whose bromine-containing end groups are substantially only --CF.sub.2 Br) are substantially not chlorinated. The desired regular telomers can then be readily separated from the higher boiling impurities by distillation. Any --CF.sub.2 Br groups present in the isolated regular telomer are then further stabilized by prolonged chlorination under the above conditions or at elevated temperatures (100.degree. C.-350.degree. C.) with irradiation by a UV lamp.
摘要翻译：公开了一种用于纯化和稳定式RCXCl（CF 2 CFCl）nBr的常规氯三氟乙烯调节剂的混合物的方法，该混合物含有相似分子量的含溴不规则调聚物杂质。调聚物混合物通过使氯三氟乙烯与式RCXClBr的脱水酶（其中R是CF 2 Br或Cl，X是Cl或F）反应来制备。然后使用单独的升高温度（100℃-350℃）将调聚物混合物进行氯化）或高温（100℃-2200℃）和主要波长区域的光能大于约3000°A的组合。在这些条件下，常规或正常调聚物的CFClBr调聚端基是氯化形成-CFCl 2端基，而含溴不规则调聚剂杂质（其含溴端基本上仅为-CF 2 Br）基本上不氯化。然后可以通过蒸馏将所需的常规调聚物容易地与较高沸点的杂质分离。然后通过在上述条件下或在升高的温度（100℃-350℃）下用UV灯照射，通过长时间氯化来进一步稳定分离的常规调聚物中存在的任何-CF 2 Br基团。

2. 发明授权

US4808760A Telomers prepared from chlorotrifluoroethylene and 1,2-dibromo-2-chlorotrifluoroethane 失效
标题翻译：由氯三氟乙烯和1,2-二溴-2-氯三氟乙烷制备的聚酯
公开(公告)号：US4808760A
公开(公告)日：1989-02-28
申请号：US816183
申请日：1986-01-06
申请人： Bobby F. Dannels , Michael J. Fifolt , David Y. Tang
发明人： Bobby F. Dannels , Michael J. Fifolt , David Y. Tang
IPC分类号： C07C17/278 , C07C17/26 , C07C19/08
CPC分类号： C07C17/278
摘要： Telomers are prepared by reacting chlorotrifluoroethylene with 1,2-dibromo-2-chlorotrifluoroethane (CBrClFCF.sub.2 Br) in the presence of a redox catalyst system comprising a metal halide selected from the group consisting of FeCl.sub.3, FeBr.sub.3, CuBr.sub.2, CuCl.sub.2, TiCl.sub.4, VCl.sub.3, and NiCl.sub.2, and a reducing agent selected from the group consisting of Fe, Ni, Cu, Ti, V and benzoin. The preferred catalyst system is ferric chloride and nickel. The telomers of this invention have the structural formula ##STR1## where n is in the range of 1 to 10, and are useful for preparing non-flammable hydraulic fluids.
摘要翻译：在包含选自FeCl 3，FeBr 3，CuBr 2，CuCl 2，TiCl 4，VCl 3和CuCl 2的金属卤化物的氧化还原催化剂体系存在下，使氯三氟乙烯与1,2-二溴-2-氯三氟乙烷（CBrClFCF 2 Br） NiCl 2和选自Fe，Ni，Cu，Ti，V和苯偶姻的还原剂。优选的催化剂体系是氯化铁和镍。本发明的调聚物具有结构式“IMAGE”，其中n在1至10的范围内，并且可用于制备不易燃的液压油。

3. 发明授权

US4952719A Process for the preparation of halo aromatic compounds 失效
标题翻译：卤代芳香族化合物的制备方法
公开(公告)号：US4952719A
公开(公告)日：1990-08-28
申请号：US303862
申请日：1989-01-27
申请人： James J. Maul , David Y. Tang
发明人： James J. Maul , David Y. Tang
IPC分类号： C07C17/093 , C07C17/20 , C07C255/49
CPC分类号： C07C255/00 , C07C17/093 , C07C17/208
摘要： A process for the preparation of 3-chloro-4,5-difluorobenzonitrile comprising the steps of(a) reacting an alkali metal fluoride with 4-chloro-3,5-dinitrobenzonitrile to form a 4-fluoro-3,5-dinitrobenzonitrile product;(b) chlorodenitrating the 4-fluoro product of step (a) to form the corresponding 3,5-dichloro-4-fluorobenzonitrile compound; and(c) reacting the 3,5-dichloro-4-fluorobenzonitrile compound prepared in step (b) with an alkali metal fluoride to form 3-chloro-4,5-difluorobenzonitrile.
摘要翻译：一种制备3-氯-4,5-二氟苄腈的方法，包括以下步骤：（a）使碱金属氟化物与4-氯-3,5-二硝基苄腈反应，形成4-氟-3,5-二硝基苯腈产物 ; （b）将步骤（a）的4-氟产物氯稀释以形成相应的3,5-二氯-4-氟苄腈化合物; 和（c）使步骤（b）中制备的3,5-二氯-4-氟苄腈化合物与碱金属氟化物反应形成3-氯-4,5-二氟苄腈。

4. 发明授权

US4590315A Process for the preparation of halo aromatic compounds 失效
标题翻译：卤代芳香族化合物的制备方法
公开(公告)号：US4590315A
公开(公告)日：1986-05-20
申请号：US660765
申请日：1984-10-15
申请人： James J. Maul , David Y. Tang
发明人： James J. Maul , David Y. Tang
IPC分类号： C07C17/00 , C07C17/093 , C07C17/20 , C07C25/13 , C07C67/00 , C07C253/00 , C07C255/49 , C07C255/50 , C07C17/22
CPC分类号： C07C255/00 , C07C17/093 , C07C17/208
摘要： A process for the preparation of chloro-difluorobenzene compounds of the formula ##STR1## where R is CN or CF.sub.3, comprises the steps of (A) reacting an alkali metal fluoride with 4-chloro-3,5-dinitrobenzonitrile or 4-chloro-3,5-dinitrobenzotrifluoride to form the corresponding 4-fluoro-3,5-dinitrobenzonitrile or 4-fluoro-3,5-dinitrobenzotrifluoride product.(B) chlorodenitrating the 4-fluoro product of step (A) to form the corresponding 3,5-dichloro-4-fluorobenzonitrile or 3,5-dichloro-4-fluorobenzotrifluoride compound.(C) reacting the 3,5-dichloro-4-fluorobenzonitrile or 3,5-dichloro-4-fluorobenzotrifluoride compound prepared in step (B) with an alkali metal fluoride to form the corresponding 3-chloro-4,5-difluorobenzonitrile or 3-chloro-4,5-difluorobenzotrifluoride compound.
摘要翻译：制备式（I）的氯代二氟苯化合物的方法，其中R是CN或CF 3，包括以下步骤：（A）使碱金属氟化物与4-氯-3,5-二硝基苯甲腈或4-氯 - 形成相应的4-氟-3,5-二硝基苯甲腈或4-氟-3,5-二硝基三氟甲苯产物。（B）将步骤（A）的4-氟产物氯稀释以形成相应的3,5-二氯-4-氟苄腈或3,5-二氯-4-氟三氟甲苯化合物。（C）使步骤（B）中制备的3,5-二氯-4-氟苄腈或3,5-二氯-4-氟三氟甲苯化合物与碱金属氟化物反应形成相应的3-氯-4,5-二氟苄腈或 3-氯-4,5-二氟三氟甲苯化合物。

5. 发明授权

US4968830A Aromatization process 失效
标题翻译：芳香化过程
公开(公告)号：US4968830A
公开(公告)日：1990-11-06
申请号：US405607
申请日：1989-09-11
申请人： David Y. Tang
发明人： David Y. Tang
IPC分类号： C07C263/02 , C07B35/04 , C07C17/00 , C07C17/25 , C07C17/357 , C07C25/13 , C07C51/36 , C07C51/363 , C07C51/377 , C07C63/70 , C07C253/30 , C07C255/50 , C07C265/12
CPC分类号： C07C253/30 , C07C17/357 , C07C51/377 , C07C51/567
摘要： Halogen substituted aromatic compounds of the formula ##STR1## wherein Y is selected from the group CO.sub.2 H, COF, COCl, COBr, CF.sub.3, CN, NCO, or F, and X and X' are independently hydrogen or a halogen selected from the group F-, Cl- and Br-, at least one of X and X' being halogen; may be prepared by the liquid phase reaction of a brominating agent, at temperatures below about 190.degree. Celsius, with a correspondingly substituted cyclohexene or cyclohexadiene.

6. 发明授权

US4704483A 3,4-difluoro-5-nitrobenzotrifluoride and preparation of fluoro-nitro-benzotrifluorides 失效
标题翻译： 3,4-二氟-5-硝基三氟甲苯和氟 - 硝基 - 三氟甲苯的制备
公开(公告)号：US4704483A
公开(公告)日：1987-11-03
申请号：US806990
申请日：1985-12-09
申请人： David Y. Tang , Byron R. Cotter , Fredrick J. Goetz
发明人： David Y. Tang , Byron R. Cotter , Fredrick J. Goetz
IPC分类号： C07B39/00 , C07C17/093 , C07C25/13 , C07C37/02 , C07C39/26 , C07C51/097 , C07C63/70 , C07C201/08 , C07C201/12 , C07C205/12 , C07C79/12
CPC分类号： C07B39/00 , C07C17/093 , C07C201/12 , C07C205/12 , C07C25/13 , C07C37/02 , C07C41/22 , C07C51/097
摘要： A process for the preparation of 3-chloro-4-fluoro-5-nitrobenzotrifluoride and 3,4-difluoro-5-nitrobenzotrifluoride by reaction of 3,4-di-chloro-5-nitrobenzotrifluoride and 4-chloro-3,5-dinitrobenzotrifluoride, respectively, with an alkali metal fluoride.
摘要翻译：通过3,4-二氯-5-硝基三氟甲苯与4-氯-3,5-二氟-5-硝基三氟甲苯的反应制备3-氯-4-氟-5-硝基三氟甲苯和3,4-二氟-5-硝基三氟甲苯的方法，二硝基三氟甲苯，分别与碱金属氟化物反应。

7. 发明授权

US4488953A Purification of recycled paraffins in photochlorination process 失效
标题翻译：循环石蜡在光氯化过程中的纯化
公开(公告)号：US4488953A
公开(公告)日：1984-12-18
申请号：US504005
申请日：1983-06-13
申请人： David Y. Tang , James G. Colson
发明人： David Y. Tang , James G. Colson
IPC分类号： C07C7/148 , C07C17/10 , C07C17/00
CPC分类号： C07C7/148 , C07C17/10
摘要： An improved process for the photochlorination of normal paraffins to prepare mono-chlorinated alkanes, in which the normal paraffin feed stream is only partially chlorinated and the unreacted normal paraffins separated and recycled, the recycled unreacted paraffin being treated with a basic material capable of removing polar impurities therefrom which may hinder the photochlorination reaction.
摘要翻译：用于正链烷烃的光氯化以制备单氯代烷烃的改进方法，其中正链烷烃进料流仅部分氯化，未反应的正链烷烃分离和再循环，循环的未反应的石蜡用能够除去极性的碱性物质处理可能阻碍光氯化反应的杂质。

8. 发明授权

US4229378A Process for the production of 1-phenyl-3-(3-trifluoromethylphenyl)-2-propanone 失效
标题翻译： 1-苯基-3-（3-三氟甲基苯基）-2-丙酮的制备方法
公开(公告)号：US4229378A
公开(公告)日：1980-10-21
申请号：US38766
申请日：1979-05-14
申请人： David Y. Tang , Arthur M. Foster
发明人： David Y. Tang , Arthur M. Foster
IPC分类号： C07C29/58 , C07C29/60 , C07C45/30 , C07C45/58 , C07C45/74 , C07C49/813 , C07C49/83 , C07D303/08 , C07D303/32 , C07C45/16
CPC分类号： C07C29/58 , C07C29/60 , C07C45/305 , C07C45/58 , C07C45/74 , C07C49/813 , C07C49/83 , C07D303/08 , C07D303/32 , C07C2101/16
摘要： The present invention provides a novel process for the production of 1-phenyl-3-(3-trifluoromethylphenyl)-2-propanone. The process comprises the steps of:(a) condensing 3-trifluoromethylbenzaldehyde with acetophenone under basic conditions to form a substituted chalcone,(b) epoxidation of the substituted chalcone to produce the corresponding epoxide,(c) converting the epoxide to a chlorohydrin,(d) catalytic hydrogenolysis of the chlorohydrin to produce a diol and subsequently converting the diol into the corresponding alcohol, and(e) oxidizing the alcohol to produce 1-phenyl-3-(3-trifluoromethylphenyl)-2-propanone.
摘要翻译：本发明提供了一种制备1-苯基-3-（3-三氟甲基苯基）-2-丙酮的新方法。该方法包括以下步骤：（a）在碱性条件下将3-三氟甲基苯甲醛与苯乙酮缩合形成取代的查耳酮，（b）取代的查耳酮的环氧化反应产生相应的环氧化物，（c）将环氧化物转化为氯代醇（ d）氯代醇的催化氢解以产生二醇，随后将二醇转化为相应的醇，和（e）氧化醇以产生1-苯基-3-（3-三氟甲基苯基）-2-丙酮。

9. 发明授权

US06284934B1 Reducing meta content of isomeric mixtures of halo substituted alkylbenzenes 失效
标题翻译：降低卤代烷基苯的异构体混合物的元素含量
公开(公告)号：US06284934B1
公开(公告)日：2001-09-04
申请号：US09480382
申请日：2000-01-10
申请人： Michael J. Fifolt , William S. Derwin , Viesturs Lesins , Arthur H. Morth , Frank P. Bermel , David Y. Tang , Mark E. Lindrose , William L. Rueter
发明人： Michael J. Fifolt , William S. Derwin , Viesturs Lesins , Arthur H. Morth , Frank P. Bermel , David Y. Tang , Mark E. Lindrose , William L. Rueter
IPC分类号： C07C1738
CPC分类号： C07C17/395 , C07C17/12 , C07C25/02 , C07C25/18
摘要： Disclosed is a method of separating the meta isomer of a haloalkylbenzene having the general formula from a mixture with at least one other isomer, where X is Cl or Br and R is alkyl from C2 to C12 or cycloalkyl from C3 to C8. About 0.0001 to about 5 wt % of a Friedel-Crafts catalyst is added to the mixture and the mixture is exposed to a brominating agent which preferentially brominates the meta isomer. The mixture is then heated at a temperature above the boiling point of the other isomers but below the boiling point of the brominated meta isomer.
摘要翻译：公开了将具有通式的卤代烷基苯的间位异构体与至少一种其它异构体的混合物分离的方法，其中X为Cl或Br，R为C2至C12的烷基或C3至C8的环烷基。将约0.0001至约5重量％的Friedel-Crafts催化剂加入到混合物中，并将混合物暴露于优先溴化偏甲基异构体的溴化剂。然后将混合物在高于其它异构体的沸点但低于溴代间异构体的沸点的温度下加热。

10. 发明授权

US5049682A Process for the preparation of halophthalic anhydrides 失效
标题翻译：制备卤代邻苯二甲酸酐的方法
公开(公告)号：US5049682A
公开(公告)日：1991-09-17
申请号：US405606
申请日：1989-09-11
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： C07D307/89 , 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.

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