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    Distillation of meta-chloronitrobenzene in the presence of a distillation adjuvant
    261.
    发明授权
    Distillation of meta-chloronitrobenzene in the presence of a distillation adjuvant 失效
    在蒸馏助剂的存在下蒸馏间氯硝基苯

    公开(公告)号：US4102753A

    公开(公告)日：1978-07-25

    申请号：US836256

    申请日：1977-09-23

    Applicant: Richard M. Stephenson

    Inventor： Richard M. Stephenson

    IPC: B01D3/36 ,  C07C201/16 ,  B01D3/34

    CPC classification number: C07C201/16 ,  B01D3/36

    Abstract: This invention relates to the azeotropic distillation of a mixture of meta-chloronitrobenzene isomers employing a lower alkylene glycol, lower oxyalkylene glycol or glycerol as the entrainer or azeotrope former. The invention has several distinct advantages, not the least of which that significantly lower still bottom temperatures can be employed, thus reducing the problems associated with the decomposition and potential explosive decomposition of nitroaromatic compounds. In addition improvements in the relative volatility of meta-chloronitrobenzene, as compared to its isomers have been accomplished.

    Abstract translation: 本发明涉及使用低级亚烷基二醇，低级亚烷基二醇或甘油作为夹带剂或共沸物的间 - 氯硝基苯异构体的混合物的共沸蒸馏。 本发明具有几个明显的优点，其中最不重要的是可以使用显着降低的底部温度，从而减少与硝基芳族化合物的分解和潜在的爆炸性分解相关的问题。 此外，与其异构体相比，间 - 氯硝基苯的相对挥发性的改进已经完成。

    Purification of dinitrotoluene
    263.
    发明授权
    Purification of dinitrotoluene 失效
    二硝基甲苯的纯化

    公开(公告)号：US3931347A

    公开(公告)日：1976-01-06

    申请号：US529873

    申请日：1974-12-05

    Applicant: David H. Rosenblatt ,  William H. Dennis, Jr.

    Inventor： David H. Rosenblatt ,  William H. Dennis, Jr.

    IPC: C07C201/16 ,  C07C79/10

    CPC classification number: C07C201/16

    Abstract: 2,4- AND 2,6-Dinitrotoluenes are separated from mixtures thereof with smallmounts of isomeric dinitrotoluene impurities by suspending the mixture in an aqueous solution containing a small amount of an alkali metal disulfide. The isomeric dinitrotoluene impurities are thereby converted to products soluble in the aqueous solution from which the 2,4- and 2,6-dinitrotoluenes can be recovered in excellent yield.

    Abstract translation: 通过将混合物悬浮在含有少量碱金属二硫化物的水溶液中，2,4-和2,6-二硝基甲苯与其混合物与少量异构二硝基甲苯杂质分离。 异构二硝基甲苯杂质由此转化成可溶于水溶液的产物，其中2,4-和2,6-二硝基甲苯可以以优异的收率被回收。

    Separation of para-nitrated phenolic compounds from crude reaction mixtures containing ortho-and para-nitrated phenolic compounds
    264.
    发明授权
    Separation of para-nitrated phenolic compounds from crude reaction mixtures containing ortho-and para-nitrated phenolic compounds 失效
    从含有邻硝基和对硝基酚化合物的粗反应混合物中分离出对硝化的酚类化合物

    公开(公告)号：US3894096A

    公开(公告)日：1975-07-08

    申请号：US46041574

    申请日：1974-04-12

    Applicant: AMERICAN CYANAMID CO

    Inventor： WHITTEN HARVEY WADE

    IPC: C07C201/16 ,  C07C79/24

    CPC classification number: C07C201/16 ,  C07C205/22

    Abstract: Para-nitrophenol or para-nitro-m-cresol is recovered in a highly purified state from a nitration reaction mixture containing para and ortho isomers of nitrophenol or nitro-m-cresol, the major proportion of said isomers being the para isomer, along with water and tar impurities, by a process comprising the steps of (1) heating the mixture in the presence of toluene to extract the para and ortho isomers into the toluene, (2) removing the water, (3) separating insoluble tars from the resulting hot toluene solution of the isomers, (4) cooling the toluene solution to 20*30*C. to precipitate the para isomer therefrom, (5) washing the precipitate with a small amount of fresh toluene to remove mother liquor therefrom and (6) drying the precipitate.

    Abstract translation: 对硝基苯酚或对硝基间甲酚是从含有硝基苯酚或硝基间甲酚的对位和邻位异构体的硝化反应混合物中以高度纯化的状态回收的，所述异构体的主要比例为对位异构体，以及 水和焦油杂质的方法，包括以下步骤：（1）在甲苯存在下加热混合物以将对位和邻位异构体萃取到甲苯中，（2）除去水，（3）从所得到的溶液中分离不溶焦油 热甲苯溶液中的异构体，（4）将甲苯溶液冷却至20-30℃，从中沉淀出对位异构体，（5）用少量新鲜甲苯洗涤沉淀物，从其中除去母液， ）干燥沉淀。

    Surface crystallization process
    265.
    发明授权
    Surface crystallization process 失效
    表面结晶工艺

    公开(公告)号：US3832410A

    公开(公告)日：1974-08-27

    申请号：US36799373

    申请日：1973-06-07

    Applicant: MONSANTO CO

    Inventor： HUG D ,  GARABEDIAN T

    IPC: C07C201/16 ,  C07C79/12

    CPC classification number: C07C201/16 ,  B01D9/0013 ,  C07C205/12

    Abstract: Improved purity is achieved in a process for separating the isomers of nitro- and halo-substituted aromatic compounds in a mixture of liquid isomers by fractional, surface crystallization from the melt, wherein the isomeric mixture is cooled until crystals form on a cooling surface. The improvement comprises conducting the fractional, surface crystallization on a glass cooling surface. The process is particularly beneficial for separating para-nitrochlorobenzene from a liquid isomeric liquid of ortho-, meta- and para-nitrochlorobenzenes.

    Abstract translation: 在通过从熔体中分级表面结晶分离液体异构体的混合物中的硝基和卤素取代的芳族化合物的异构体的方法中实现了提高的纯度，其中将异构体混合物冷却直到在冷却表面上形成晶体。 该改进包括在玻璃冷却表面上进行分数表面结晶。 该方法特别有利于从对 - ，间 - 和对 - 硝基氯苯的液体异构体液体中分离对硝基氯苯。

    Nitration of toluene and nitrotoluenes to form tnt
    267.
    发明授权
    Nitration of toluene and nitrotoluenes to form tnt 失效
    硝酸盐和硝酸盐形成TNT

    公开(公告)号：US3742072A

    公开(公告)日：1973-06-26

    申请号：US3742072D

    申请日：1972-03-28

    Applicant: ROTH M

    Inventor： ROTH M

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

    CPC classification number: C07C201/16 ,  C07C205/06

    Abstract: The invention provides a novel method for recovering and recycling nitrotoluenes contained in aqueous waste liquors obtained in the manufacture of TNT, particularly from systems for filtering vapors from spent sulfuric acid concentrators. In the novel method, the nitrotoluenes are efficiently and economically extracted from such liquors with toluene and the toluene containing the extracted nitrotoluenes is nitrated to produce TNT of military specification grade.

    Abstract translation: 本发明提供了一种用于回收和回收在制造TNT中获得的含水废液中所含的硝基甲苯的新方法，特别是用于从废硫酸浓缩器过滤蒸汽的系统。 在新方法中，硝基甲苯经甲烷和甲苯萃取得到高效，经济的萃取，硝酸甲苯被硝化生成军用级TNT。

    Pesticidal esters of 2,6-dinitro-4-alkyl phenols
    268.
    发明授权
    Pesticidal esters of 2,6-dinitro-4-alkyl phenols 失效
    2,6-二氨基-4-羟基苯酚的杀虫剂

    公开(公告)号：US3715384A

    公开(公告)日：1973-02-06

    申请号：US3715384D

    申请日：1970-08-27

    Applicant: EDWARDS J ,  PIANKA M

    Inventor： PIANKA M ,  EDWARDS J

    IPC: C07C201/16 ,  C07C205/23 ,  C07C205/43 ,  C07C69/24 ,  C07C69/52 ,  C07C69/78

    CPC classification number: C07C205/23 ,  C07C205/43

    Abstract: Fungicidal compounds useful for the control of plant mildews are 4-alkyl-2,6-dinitrophenyl esters wherein the 4-alkyl group is selected from 1-ethyl-n-hexyl, 1-n-propyl-n-hexyl, 1-n-butyl-nhexyl, 1-n-pentyl-n-hexyl, 1-ethyl-n-pentyl, 1-n-propyl-n-pentyl, 1-n-butyl-n-pentyl and 1-n-propyl-n-butyl.

    Abstract translation: 可用于防治植物性霉菌的杀真菌化合物是4-烷基-2,6-二硝基苯基酯，其中4-烷基选自1-乙基正己基，1-正丙基正己基，1-n 正己基，1-正戊基 - 正己基，1-乙基 - 正戊基，1-正丙基 - 正戊基，1-正丁基 - 正戊基和1-正丙基 - 丁基。

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