公开(公告)号：US5099079A

公开(公告)日：1992-03-24

申请号：US559970

申请日：1990-07-26

Applicant: Allen B. Quakenbush

Inventor： Allen B. Quakenbush

IPC: C07C20060101 ,  C07C201/06 ,  C07C201/08 ,  C07C201/16 ,  C07C205/06

CPC classification number: C07C201/16

Abstract: Described herein is a process for separating an acid impurity from a solution containing acid and a nitro substituted aromatic compound by contacting the solution with at least one molten nitrate salt.

Abstract translation: 本文描述的是通过使该溶液与至少一种熔融硝酸盐接触来从含有酸和硝基取代的芳族化合物的溶液中分离酸性杂质的方法。

公开(公告)号：US5098576A

公开(公告)日：1992-03-24

申请号：US700327

申请日：1991-05-09

Applicant: Karin Cabrera ,  Willi Jost ,  Karl-Friedrich Krebs

Inventor： Karin Cabrera ,  Willi Jost ,  Karl-Friedrich Krebs

IPC: B01J20/283 ,  B01D15/08 ,  B01J20/02 ,  B01J20/281 ,  C07B63/00 ,  C07C7/12 ,  C07C15/00 ,  C07C43/205 ,  C07C201/16 ,  C07C205/34 ,  C07C231/24 ,  C07C233/15 ,  C07C401/00 ,  C07D233/74 ,  G01N30/88

CPC classification number: B01J20/0251

Abstract: In adsorption and chromatography proceseses for the separation of at least one substance from a mixture of substances, silicon carbide is used as the adsorbent and as a support material in such processes.

Abstract translation: 在用于从物质混合物分离至少一种物质的吸附和色谱法中，使用碳化硅作为吸附剂和作为这些方法中的载体材料。

公开(公告)号：US4990670A

公开(公告)日：1991-02-05

申请号：US394986

申请日：1989-08-17

Applicant: Jeffrey S. Stults ,  Henry C. Lin

Inventor： Jeffrey S. Stults ,  Henry C. Lin

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

CPC classification number: C07C201/12 ,  C07C201/16 ,  C07C213/02

Abstract: 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.

公开(公告)号：US4879401A

公开(公告)日：1989-11-07

申请号：US102370

申请日：1987-09-29

Applicant: Arthur R. Doumaux, Jr. ,  James R. Nelson

Inventor： Arthur R. Doumaux, Jr. ,  James R. Nelson

IPC: C07C201/16 ,  C07C67/00 ,  C07C201/00 ,  C07C201/04 ,  C07C203/00 ,  C07C203/02 ,  C07C203/04

CPC classification number: C07C201/04

Abstract: A process is provided for removing impurities from the gaseous product of an alkyl nitrite production zone by contacting a portion of it with lower alcohol and oxygen to convert substantially all of the nitric oxide in that portion of the gaseous product stream to alkyl nitrite, the oxygen being present in an amount such that the mole ratio of nitric oxide to oxygen is in the range of about 4:1 to about 2:1 and the lower alcohol being present in the reaction zone such that the mole ratio of nitric oxide to lower alcohol is about 1:1 or less. A recovery stream, comprising alkyl nitrite substantially free of nitric oxide, is withdrawn from the reaction zone and at least a portion of the alkyl produced in the reaction zone is removed. A least a portion of the balance of the recovery stream from which the alkyl nitrite has been removed is purged, thereby removing impurities from the process.

Abstract translation: 提供了一种通过使其一部分与低级醇和氧接触而从亚硝酸烷基酯生产区的气态产物中除去杂质的方法，以将该部分气态产物流中的所有一氧化氮转化为亚硝酸烷基酯，氧气 存在的量使得一氧化氮与氧的摩尔比在约4:1至约2:1的范围内，低级醇存在于反应区中，使得一氧化氮与低级醇的摩尔比 约为1：1或更少。 包含基本上不含一氧化氮的亚硝酸烷基酯的回收流从反应区中排出，并且除去反应区中产生的烷基的至少一部分。 将亚硝酸烷基酯从其中除去的回收料流的余量的至少一部分被清除，从而从该方法中除去杂质。

公开(公告)号：US4724268A

公开(公告)日：1988-02-09

申请号：US882246

申请日：1986-07-07

Applicant: Keizaburo Yamaguchi ,  Kenichi Sugimoto ,  Yoshimitsu Tanabe ,  Teruyuki Nagata ,  Akihiro Yamaguchi

Inventor： Keizaburo Yamaguchi ,  Kenichi Sugimoto ,  Yoshimitsu Tanabe ,  Teruyuki Nagata ,  Akihiro Yamaguchi

IPC: C07C201/16 ,  C07C317/14 ,  C07C147/06 ,  C07C79/36

CPC classification number: C07C201/16 ,  C07C315/04 ,  C07C315/06

Abstract: A crude 3,3'-dinitrodiphenyl compound selected from 3,3'-dinitrodiphenylsulfone or 3,3'-dinitrobenzophenone is purified by reacting the crude 3,3'-dinitrodiphenyl compound with a lower alcohol in the presence of a base so as to convert practically the isomer or isomers, which contain one or more nitro groups at the ortho- or/and para-positions, only into the corresponding alkoxy compound or compounds thereof and then separating the alkoxy compound or compounds.

Abstract translation: 选自3,3'-二硝基二苯砜或3,3'-二硝基二苯甲酮的粗3,3'-二硝基二苯基化合物通过在碱存在下使粗3,3'-二硝基二苯基化合物与低级醇反应而纯化，以便 实际上将邻位或对位上含有一个或多个硝基的异构体或异构体转化为相应的烷氧基化合物或其化合物，然后分离烷氧基化合物或化合物。

公开(公告)号：US4620047A

公开(公告)日：1986-10-28

申请号：US661860

申请日：1984-10-18

Applicant: Hermann A. Zinnen

Inventor： Hermann A. Zinnen

IPC: B01D15/04 ,  B01J20/18 ,  C07C67/00 ,  C07C201/00 ,  C07C201/16 ,  C07C205/06 ,  C07C79/10

CPC classification number: C07C201/16

Abstract: An adsorptive separation process for separating ortho-nitrotoluene from a feed mixture comprising the ortho-isomer and at least one other isomer of nitrotoluene. The process comprises contacting the feed mixture with an adsorbent comprising a type X zeolite, containing at the exchangeable cationic sites cations of metals from Group IA or IIA of the Periodic Table of Elements, selectively adsorbing substantially all of the ortho-nitrotoluene to the substantial exclusion of the remaining isomers, removing the non-adsorbed portion of the feed mixture from contact with the adsorbent, and thereafter recovering high-purity ortho-isomer by desorption with nitrobenzene.

Abstract translation: 用于从包含邻位异构体和至少一种其它异构体的硝基甲苯的进料混合物中分离邻硝基甲苯的吸附分离方法。 该方法包括使进料混合物与包含X型沸石的吸附剂接触，所述吸附剂在可交换的阳离子位置含有来自元素周期表的IA或IIA族金属的阳离子，选择性吸附基本上所有的邻硝基甲苯至实质排除 的剩余异构体，将进料混合物的未吸附部分与吸附剂接触，然后通过用硝基苯解吸回收高纯度邻位异构体。

公开(公告)号：US4604489A

公开(公告)日：1986-08-05

申请号：US602577

申请日：1984-04-20

Applicant: Eleonore G. Kayser

Inventor： Eleonore G. Kayser

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

CPC classification number: C07C201/16

Abstract: The production of 2,2',4,4',6,6'-hexanitrostilbene-II (HNS-II) having fin divided particles of uniform size by dissolving HNS-II in hot dimethylsulfoxide and then injecting the hot solution through a small orifice into methanol at a temperature of from -50.degree. C. to -80.degree. C.

Abstract translation: 通过将HNS-II溶解在热的二甲基亚砜中，然后将热溶液通过小的方法注入，生产具有均匀尺寸的细碎颗粒的2,2'，4,4'，6,6'-己rost二烯-II（HNS-II） 在-50℃至-80℃的温度下进入甲醇

公开(公告)号：US4604214A

公开(公告)日：1986-08-05

申请号：US766849

申请日：1985-08-16

Applicant: Richard V. C. Carr ,  Carl J. Martin ,  Roland Gonzalez ,  Thomas A. Albanese

Inventor： Richard V. C. Carr ,  Carl J. Martin ,  Roland Gonzalez ,  Thomas A. Albanese

IPC: C02F1/72 ,  C02F9/00 ,  C07C201/16

CPC classification number: C07C201/16 ,  C02F1/722 ,  C02F2101/38 ,  C02F2103/36 ,  Y10S210/909

Abstract: This invention relates to a process for removing trinitrocresols and picric acid contaminants from a wastewater stream generated in the production of nitroaromatics, particularly dinitrotoluene, by the mixed acid technique. The process involves contacting the crude dinitrotoluene generated by the mixed acid technique with an alkaline medium to generate an alkaline wash water containing water soluble nitrocresols and picric acid therein. This wastewater then, is separated from the organic component or may be recycled for contact with further quantities of crude dinitrotoluene product from the reactor. When the concentration of the water soluble salts of trinitrocresols and picric acid is of sufficient concentration, the wash water is treated with aqueous acid in sufficient proportion to reduce the pH to a level from 3-4. After pH adjustment, the medium is contacted with hydrogen peroxide and a ferrous ion under conditions to effect oxidation of a substantial portion of the trinitrocresol to carboxylic acid, nitric acid and carbon dioxide.

Abstract translation: 本发明涉及通过混合酸技术从硝基芳族化合物，特别是二硝基甲苯的生产中产生的废水中除去三硝基甲酚和苦味酸污染物的方法。 该方法包括将由混合酸技术产生的粗二硝基甲苯与碱性介质接触，以产生含有水溶性硝基甲酚和苦味酸的碱性洗涤水。 然后，该废水与有机组分分离，或者可以再循环用于与来自反应器的另外量的粗二硝基甲苯产物接触。 当三硝基甲酚和苦味酸的水溶性盐的浓度足够浓度时，用酸水溶液以足够的比例处理洗涤水，将pH降至3-4。 在pH调节之后，使介质与过氧化氢和亚铁离子接触，以使大部分三硝基甲酚氧化成羧酸，硝酸和二氧化碳。

公开(公告)号：US4599429A

公开(公告)日：1986-07-08

申请号：US559574

申请日：1983-12-08

Applicant: Roy R. Odle

Inventor： Roy R. Odle

IPC: C07C201/16 ,  C07D209/48

CPC classification number: C07D209/48

Abstract: A means for decomposing undesirable by-products formed during the nitration by nitric acid only of N--C.sub.1 to C.sub.8 alkyl phthalimides which comprises elevating the temperature of the reaction mix during or following nitration and an improved nitration process incorporating said means.

Abstract translation: 一种用于分解仅在硝酸中由N-C1至C8烷基苯二酰亚胺硝化形成的不希望的副产物的方法，其包括在硝化期间或之后提高反应混合物的温度，以及包含所述方法的改进的硝化过程。

公开(公告)号：US4524226A

公开(公告)日：1985-06-18

申请号：US563209

申请日：1983-12-19

Applicant: Shu-Chieh P. Wang ,  Martin B. Sherwin

Inventor： Shu-Chieh P. Wang ,  Martin B. Sherwin

IPC: C07C45/29 ,  C07C201/14 ,  C07C201/16 ,  C07C205/02 ,  C07C79/02

CPC classification number: C07C45/29 ,  C07C201/14 ,  C07C201/16

Abstract: A process for selectively forming nitro compounds by contacting, at elevated temperature and pressure and in a homogeneous gas phase, an aldehyde having from two to ten carbon atoms with nitrogen dioxide alone or in the presence of oxygen and/or water.

Abstract translation: 通过在升高的温度和压力下，均匀气相中将二至十个碳原子的二氧化碳与二氧化氮单独或在氧气和/或水的存在下接触来选择性地形成硝基化合物的方法。