公开(公告)号：US4450297A

公开(公告)日：1984-05-22

申请号：US476093

申请日：1983-03-17

Applicant: Michael Preiss ,  Wolfgang Gau ,  Horst Behre

Inventor： Michael Preiss ,  Wolfgang Gau ,  Horst Behre

IPC: C07C201/16 ,  C07C20060101 ,  C07C45/78 ,  C07C67/00 ,  C07C201/00 ,  C07C205/44 ,  C07C76/06 ,  C07C79/36

CPC classification number: C07C201/12 ,  C07C201/16

Abstract: A process for the preparation of o-nitrobenzaldehyde, comprising converting to the corresponding acetals a mixture of nitrated benzaldehyde which contains about 10 to 30% of o-nitrobenzaldehyde and about 70 to 90% of m-nitrobenzaldehyde, removing the o-nitrobenzaldehyde acetal by distillation, and then converting the o-nitrobenzaldehyde acetal to o-nitrobenzaldehyde.

Abstract translation: 一种制备邻硝基苯甲醛的方法，包括将相应的缩醛转化成含有约10-30％邻硝基苯甲醛的硝化苯甲醛和约70-90％间硝基苯甲醛的混合物，通过以下步骤除去邻硝基苯甲醛缩醛 蒸馏，然后将邻硝基苯甲醛缩醛转化为邻硝基苯甲醛。

公开(公告)号：US4440962A

公开(公告)日：1984-04-03

申请号：US370746

申请日：1982-04-22

Applicant: Edoardo Pallucca

Inventor： Edoardo Pallucca

IPC: C07C201/16 ,  C07C79/12

CPC classification number: C07C201/16

Abstract: To obtain technical TRIFLURALIN with a nitrosoamine content not exceeding 1 ppm, for use as a herbicide, 1-chloro-2,6-dinitro-4-(trifluoromethyl) benzene (DINITRO-PCBT) is freed from nitrosating agents by a process in which DINITRO-PCBT is treated with an aqueous bisulphite solution having an SO.sub.2 concentration of between 1% and 5% at a pH of between 1 and 3, at a temperature of between 50.degree. and 100.degree. C. for a time of between 1 and 3 hours. The organic layer is then separated from the aqueous layer, and the acidity and last traces of the bisulphite solution are eliminated from the organic layer by means of an aqueous alkaline solution.

Abstract translation: 为了获得亚硝基含量不超过1ppm的技术性三氟乙烯，为了用作除草剂，1-氯-2,6-二硝基-4-（三氟甲基）苯（DINITRO-PCBT）通过以下方法除去亚硝化剂： DINITRO-PCBT在pH为1至3之间的SO 2浓度为1％至5％的亚硫酸氢钠水溶液中处理，温度为50至100℃，时间为1至3 小时。 然后将有机层与水层分离，并通过碱性水溶液从有机层中除去亚硫酸氢盐溶液的酸度和最后痕量。

公开(公告)号：US4405805A

公开(公告)日：1983-09-20

申请号：US286996

申请日：1981-07-27

Applicant: Thomas J. Giacobbe ,  Grace Tsien

Inventor： Thomas J. Giacobbe ,  Grace Tsien

IPC: C07C255/54 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C205/11 ,  C07C205/59 ,  C07C253/00 ,  C07C313/00 ,  C07C315/06 ,  C07C317/22 ,  C07C317/46 ,  C07C79/46

CPC classification number: C07C205/59 ,  C07C201/16

Abstract: Crude phenoxybenzoic acid herbicide, e.g., acifluorfen, having one or more undesirable isomers/by-product impurities associated therewith is separated therefrom employing an inert solvent which is selective for the isomers/other by-products.

Abstract translation: 使用对异构体/其它副产物有选择性的惰性溶剂，将与其相关的一种或多种不期望的异构体/副产物杂质的粗苯氧基苯甲酸除草剂，例如氟锁草醚分离。

公开(公告)号：US4361712A

公开(公告)日：1982-11-30

申请号：US151024

申请日：1980-05-19

Applicant: Frederick L. Herman ,  John E. Sawicki

Inventor： Frederick L. Herman ,  John E. Sawicki

IPC: C07C67/00 ,  C07C201/00 ,  C07C201/08 ,  C07C201/16 ,  C07C205/06 ,  C07C205/21 ,  C07C76/02

CPC classification number: C07C201/08

Abstract: The invention relates to a method of eliminating or substantially reducing the amount of cyanide formed in a polynitroaromatic, e.g. dinitrotoluene process. The invention comprises removing the nitrophenolic material from the mononitroaromatic formed in a first stage nitration of toluene prior to feeding the mononitroaromatic to the subsequent nitration zones.

Abstract translation: 本发明涉及一种消除或显着减少在多硝基芳族化合物中形成的氰化物的量的方法。 二硝基甲苯工艺。 本发明包括在将单硝基芳族化合物送入后续硝化区之前，从在甲苯的第一阶段硝化中形成的一硝基芳族化合物中除去硝基酚物质。

公开(公告)号：US4323431A

公开(公告)日：1982-04-06

申请号：US175082

申请日：1980-08-04

Applicant: Masatoshi Takahashi ,  Norio Kotera ,  Masatoshi Uegaki ,  Takashi Miyaoka ,  Yuzo Maegawa

Inventor： Masatoshi Takahashi ,  Norio Kotera ,  Masatoshi Uegaki ,  Takashi Miyaoka ,  Yuzo Maegawa

IPC: C07C46/10 ,  B01D3/10 ,  B01D3/14 ,  C07B31/00 ,  C07B63/00 ,  C07C45/00 ,  C07C50/18 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C205/47 ,  C07C209/00 ,  C07C209/84 ,  C07C225/34 ,  B01D1/22 ,  C07C97/24

CPC classification number: B01D3/14 ,  B01D3/103 ,  Y10S203/90

Abstract: A high melting, high boiling organic compound is easily and stably purified by continuously supplying the molten organic compound to a rectification zone under a subatmospheric pressure and continuously distilling off and recovering vapors from the top of the rectification zone, while continuously withdrawing bottoms containing higher boiling impurities and/or involatile impurities than the desired compound from a reboiling zone at the bottom of the rectification zone to the outside of rectification system by means of a barometric leg, without any pretreatment of removing lower boiling impurities therefrom before the rectification, and without disturbing a pressure balance in the rectification system.

Abstract translation: 高熔点高沸点有机化合物通过在低于大气压的压力下将熔融的有机化合物连续供给至精馏区而容易且稳定地纯化，并连续地从精馏区的顶部蒸馏除去蒸气，同时连续地将含有较高沸点 杂质和/或非挥发性杂质比来自精馏区底部的再沸腾区域至整流系统外部的所需化合物通过气压腿，而无需在精馏之前从其中除去较低沸点的杂质，并且不受干扰 整改系统的压力平衡。

公开(公告)号：US4310500A

公开(公告)日：1982-01-12

申请号：US145637

申请日：1980-05-01

Applicant: Gerhard Langecker ,  Hans-Jurgen Gebauer ,  Heinrich Hermann

Inventor： Gerhard Langecker ,  Hans-Jurgen Gebauer ,  Heinrich Hermann

IPC: C07B43/02 ,  C07C201/16 ,  C07C79/10

CPC classification number: C07B43/02

Abstract: In the nitration of a volatile aromatic compound wherein the compound is reacted with a liquid nitrating agent thereby to effect nitration and to produce a waste gas containing some of the aromatic compound, nitrogen oxides and nitric acid, the improvement which comprises contacting the waste gas with fresh nitrating agent thereby to remove the aromatic compound from the gas into the nitrating agent, and thereafter using such nitrating agent to effect subsequent nitration.

Abstract translation: 在挥发性芳族化合物的硝化中，其中化合物与液体硝化剂反应，从而进行硝化并产生含有一些芳族化合物，氮氧化物和硝酸的废气，其改进包括使废气与 新鲜的硝化剂，从而将芳族化合物从气体中除去到硝化剂中，然后使用这种硝化剂进行硝化。

公开(公告)号：US4284797A

公开(公告)日：1981-08-18

申请号：US44122

申请日：1979-05-31

Applicant: Peter Furrer ,  Harry Beyeler

Inventor： Peter Furrer ,  Harry Beyeler

IPC: C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C205/57 ,  C07C79/46

CPC classification number: C07C201/16

Abstract: A novel improved process for separating mixtures of 3- and 4-nitrophthalic acid is described. The said process comprises treating a mixture of 3- and 4-nitrophthalic acid, which mixture is free from inorganic acid residues, in an aqueous-organic medium containing 1-20 percent by volume of water, at a temperature of between 20.degree. and 100.degree. C., stepwise with a base capable of forming salts of 3- and 4-nitrophthalic acid, which salts are essentially insoluble in the reaction medium, the treatment being carried out by adding base until a pH value of about 2.8 is obtained, separating the precipitating product consisting mainly of a 3-nitrophthalic acid mono-salt, subsequently precipitating, by the addition of further base, a product consisting principally of a 4-nitrophthalic acid salt, and finally converting the resulting nitrophthalic acid salts separately into the corresponding free acids, and optionally purifying these. The 3- and 4-nitrophthalic acid can be obtained by the process according to the invention in a simple manner in an isomer-free form and in good to very good yields.

Abstract translation: 描述了一种用于分离3-和4-硝基邻苯二甲酸的混合物的改进方法。 所述方法包括在含有1-20体积％水的含水有机介质中，在20至100℃的温度下处理3-和4-硝基邻苯二甲酸的混合物，该混合物不含无机酸残基 ℃，与能够形成3-和4-硝基邻苯二甲酸盐的碱分步，该盐基本上不溶于反应介质，该处理通过加入碱进行直到获得约2.8的pH值，分离 主要由3-硝基邻苯二甲酸单盐组成的沉淀产物，随后通过加入另外的碱沉淀出主要由4-硝基邻苯二甲酸盐组成的产物，最后将所得的硝基邻苯二甲酸盐分别转化为相应的无 酸，并任选地纯化这些。 3-和4-硝基邻苯二甲酸可以通过本发明的方法以简单的方式以无异构体的形式和良好至非常好的产率获得。

公开(公告)号：US4260837A

公开(公告)日：1981-04-07

申请号：US126269

申请日：1980-03-03

Applicant: Joseph C. Dacons

Inventor： Joseph C. Dacons

IPC: C07C201/16 ,  C07C205/06 ,  C07C79/10

CPC classification number: C07C201/16

Abstract: The production of 2,2',4,4',6,6'-hexanitrostilbene-I (HNS-I) having finelyivided particles of uniform size by dissolving HNS-II in hot fuming nitric acid and then drowning the HNS-nitric acid solution in water.

Abstract translation: 通过将HNS-II溶解在热的发烟硝酸中，然后淹没HNS-硝酸，生产具有均匀尺寸的细碎颗粒的2,2'，4,4'，6,6'-己rost二烯-I（HNS-1） 酸溶液在水中。

公开(公告)号：US4241229A

公开(公告)日：1980-12-23

申请号：US64674

申请日：1979-08-08

Applicant: Verner Alexanderson

Inventor： Verner Alexanderson

IPC: C07C201/16 ,  C07C79/10

CPC classification number: C07C201/16 ,  C07C201/08

Abstract: The wash liquor resulting from the nitration of aromatic compounds is contacted with a quantity of the same aromatic compound being nitrated and the resultant solution is recycled to the nitration process.

Abstract translation: 将由芳族化合物硝化产生的洗涤液与一定数量的被硝化的芳族化合物接触，将所得溶液再循环至硝化过程。

公开(公告)号：US4153630A

公开(公告)日：1979-05-08

申请号：US735549

申请日：1976-10-26

Applicant: Yataro Ichikawa ,  Yoshiyuki Yamanaka ,  Hideki Tsuruta ,  Mamoru Yamamoto ,  Kenichi Kato

Inventor： Yataro Ichikawa ,  Yoshiyuki Yamanaka ,  Hideki Tsuruta ,  Mamoru Yamamoto ,  Kenichi Kato

IPC: C07C7/152 ,  C07C13/70 ,  C07C15/02 ,  C07C37/86 ,  C07C39/06 ,  C07C39/07 ,  C07C39/28 ,  C07C41/34 ,  C07C201/16 ,  C07C7/00

CPC classification number: C07C201/16 ,  C07C13/70 ,  C07C15/02 ,  C07C37/86 ,  C07C41/34 ,  C07C41/44 ,  C07C67/60 ,  C07C7/152

Abstract: An inclusion compound comprising meta-cyclophane of the formula ##STR1## and at least one benzene derivative included therein. And a process for separating an isomer containing a substituent at least at the 1- and 4-positions from a mixture containing isomers of a benzene derivative, which comprises contacting the meta-cyclophane with the mixture containing isomers of a benzene derivative thereby to form an inclusion compound in which an isomer containing a substituent at least at the 1- and 4-positions is included in the meta-cyclophane, then separating the inclusion compound from the mixture, and thereafter separating the isomer from the inclusion compound.

Abstract translation: 包含式IMA IMA的间 - 环烷烃和包含其中的至少一种苯衍生物的包合物。 以及至少在1位和4位含有取代基的异构体与含有苯衍生物异构体的混合物分离的方法，该方法包括使间 - 环烷烃与含有苯衍生物异构体的混合物接触，从而形成 包含化合物，其中含有至少在1位和4位的取代基的异构体包括在间 - 环烷烃中，然后从混合物中分离包合物，然后将该异构体与包合物分离。