PROCESS FOR PREPARING HIGH PURITY TNT
    432.
    发明申请
    PROCESS FOR PREPARING HIGH PURITY TNT 审中-公开
    制备高纯度TNT的方法

    公开(公告)号:WO2005005342A3

    公开(公告)日:2006-05-04

    申请号:PCT/US2004012425

    申请日:2004-04-21

    CPC classification number: C07C201/08 C07C205/06

    Abstract: A process for preparing trinitrololuene (TNT) in which toluene is treated with nitric acid having a concentration of about 90% to about 99%, and preferably about 98% to about 99%, by weight at a temperature of less than about 60°C, and preferably less than 30°C, to produce high purity dinitrotoluene. The resulting dinitrotoluene is then treated with nitric acid having a concentration of about 98% to about 99% by weight and trifluoromethane sulfuric acid to produce high purity TNT.

    Abstract translation: 一种制备三硝基甲苯(TNT)的方法,其中在低于约60℃的温度下,用浓度为约90%至约99%,优选约98%至约99%的硝酸处理甲苯 ,优选小于30℃,以产生高纯度二硝基甲苯。 然后用浓度为约98%至约99%重量的硝酸和三氟甲烷硫酸处理所得的二硝基甲苯以产生高纯度的TNT。

    2,5−ビス(トリフルオロメチル)ニトロベンゼンの製造方法
    433.
    发明申请
    2,5−ビス(トリフルオロメチル)ニトロベンゼンの製造方法 审中-公开
    生产2,5-BIS(三氟甲基)硝基苯的方法

    公开(公告)号:WO2003062187A1

    公开(公告)日:2003-07-31

    申请号:PCT/JP2003/000660

    申请日:2003-01-24

    Inventor: 清水 環

    CPC classification number: C07J75/00 C07C201/08 C07J73/00 C07C205/11

    Abstract: A process by which 2,5-bis(trifluoromethyl)nitrobenzene can be produced from an industrially easily available material in high yield through a small number of steps under mild reaction conditions using an easily handleable substance with which the reaction operation is easy. 1,4-Bis(trifluoromethyl)benzene is nitrated with nitric acid in a solvent comprising as an essential ingredient an acid selected between sulfuric acid having a sulfuric acid concentration of 91 to 100 wt.% and fuming sulfuric acid having a sulfur trioxide concentration higher than 0 wt.% and not higher than 20 wt.%.

    Abstract translation: 通过使用易于处理的物质(反应操作容易),在温和的反应条件下,通过少量的步骤,可以从工业上容易获得的材料以高产率制备2,5-双(三氟甲基)硝基苯的方法。 将1,4-双(三氟甲基)苯在硝酸中在含有选自硫酸浓度为91〜100重量%的硫酸和三氧化硫浓度较高的发烟硫酸作为主要成分的溶剂中硝化 0重量%以上20重量%以下。

    PROCESS FOR THE PREPARATION OF DIPHENYL ETHER COMPOUNDS
    436.
    发明申请
    PROCESS FOR THE PREPARATION OF DIPHENYL ETHER COMPOUNDS 审中-公开
    制备二苯醚化合物的方法

    公开(公告)号:WO01046130A1

    公开(公告)日:2001-06-28

    申请号:PCT/GB2000/004731

    申请日:2000-12-11

    CPC classification number: C07C201/08 C07C303/40 C07C311/51 C07C205/59

    Abstract: A process for producing fomesafen from acifluorfen comprises the steps of (a) converting acifluorfen to its acid chloride, (b) coupling the acid chloride so formed with methanesulphonamide to form crude fomesafen and (c) purifying the crude fomesafen, characterised in that each of the steps is carried out in a single common solvent, which is preferably a chloroalkane. Preferably the steps are telescoped together so that there is no isolation of the product for any step until fomesafen is obtained.

    Abstract translation: 从氟锁草醚生产福莫斯芬的方法包括以下步骤:(a)将氟锁草醚转化为其酰氯,(b)将形成的酰氯与甲磺酰胺偶联形成粗制呋喃酮,(c)纯化粗制物,其特征在于, 该步骤在单一的普通溶剂中进行,其优选为氯代烷烃。 优选地,这些步骤被伸缩在一起,使得在获得fomesafen之前,没有任何步骤的产品被隔离。

    METHOD FOR OBTAINING 2-NITROBENZALDEHIDE DERIVATIVES AND NITROBENZOIC ACID DERIVATIVES
    439.
    发明申请
    METHOD FOR OBTAINING 2-NITROBENZALDEHIDE DERIVATIVES AND NITROBENZOIC ACID DERIVATIVES 审中-公开
    获得2-硝基苯并恶唑衍生物和硝基苯甲酸衍生物的方法

    公开(公告)号:WO1992002485A1

    公开(公告)日:1992-02-20

    申请号:PCT/ES1991000049

    申请日:1991-07-29

    Inventor: ERCROS S.A.

    Abstract: Method for obtaining 2-nitrobenzaldehide derivatives and nitrobenzoïc acid derivatives having the formula (Ia) (III) respectively, wherein R is H, C1-4 alkyl, C1-4 alkoxy or halogen. The method is comprised of selectively oxidizing a mixture of nitrobenzaldehide derivatives (I) with an aqueous solution of an oxidizing agent (II) wherein X is halogen, M is an alkaline or alkaline-earth metal and n is 1 or 2. Through said oxidation, 3-nitrobenzaldehide derivatives essentially are oxidized. 2-nitrobenzaldehide derivatives (Ia) not oxidized may be removed through the use of a water-unmiscible solvent and the nitrobenzoïc acid derivatives (III) may be precipitated in the aqueous phase by pH regulation. In a preferred mode of execution, 2-nitrobenzaldehide is of pharmaceutical interest as coronary dilator and 3-nitrobenzoïc acid is of interest in the industry of dyes and in medicine as synthesis intermediary.

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