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    • 85. 发明授权
    • Process for catalytically reducing nitroaromatic compounds
    • 催化还原硝基芳族化合物的方法
    • US4535162A
    • 1985-08-13
    • US504748
    • 1983-06-16
    • Giovanni MestroniGrazia ZassinovichEnzo Alessio
    • Giovanni MestroniGrazia ZassinovichEnzo Alessio
    • C07D213/18B01J31/00C07B61/00C07C67/00C07C209/00C07C209/36C07C211/46C07C211/47C07C211/51C07C211/52C07D213/22C07D471/04C07D215/38C07D211/72C07D239/02
    • C07C209/36
    • A process is herein described for catalytically reducing nitroaromatic compounds by displacement of hydrogen from carbon monoxide and water or from synthesis gas to nitroaromatic compounds, the catalytic reduction being catalyzed by complexes of rhodium, iridium, ruthenium and osmium; said process is characterized in that the CO+H.sub.2 O system or the (CO+H.sub.2)+H.sub.2 O system is caused to react with a nitroaromatic compound of formula:Ar--(NO.sub.2).sub.x (I)wherein Ar is an aryl or hetero-aryl group, also substituted by inert groups; x is an integer from 1 to 3, in the presence of a complex catalyst of formula:[MChel(L).sub.2 ].sup.+ X.sup.- (II)or of a catalyst composed by carbonyl compounds and chelants of formula:Mz(CO).sub.y +nChel (III)wherein M=Rh, Ir, Ru, Os; "Chel" is a bidentate or tridentate aromatic nitrogen chelating compound; "L" is a molecule of carbon monoxide or of an olefin or half a molecule of a diolefin; X.sup.- is an anion selected from Cl.sup.-, Br.sup.-, I.sup.-, PF.sub.6.sup.-, BF.sub.4.sup.-, B(C.sub.6 H.sub.5).sub.4.sup.-, CO.sub.3.sup.-- and HCO.sub.3.sup.- ; z, y are integers with n being an integer or a fractional number, at temperatures ranging from about 25.degree. C. to 250.degree. C., at a carbon monoxide pressure between 1 and 150 atmospheres.The products obtained from the hydrogenation of the starting nitroaromatic compounds consist of arylamines in general and are utilized as intermediates for the organic syntheses in the field of fine chemicals.
    • 本文描述了通过将氢从一氧化碳和水或从合成气置换为硝基芳族化合物来催化还原硝基芳族化合物的方法,催化还原由铑,铱,钌和锇的络合物催化; 所述方法的特征在于使CO + H 2 O体系或(CO + H 2)+ H 2 O体系与式Ar-(NO 2)x(I)的硝基芳族化合物反应,其中Ar是芳基或杂芳基 组,也被惰性基团取代; 在具有下式的复合催化剂存在下,x是1至3的整数:[MChel(L)2] + X-(II)或由羰基化合物和下式的螯合剂组成的催化剂:Mz(CO)y + nChel(III)其中M = Rh,Ir,Ru,Os; “Chel”是二齿或三齿芳族氮螯合化合物; “L”是一氧化碳或烯烃或半分子二烯烃的分子; X-是选自Cl-,Br-,I-,PF6-,BF4-,B(C6H5)4-,CO3-和HCO3-的阴离子; z,y是在约25℃至250℃的温度范围内,在1至150个大气压的一氧化碳压力下,n为整数或分数的整数。 从起始硝基芳族化合物的氢化获得的产物通常由芳基胺组成,并用作精细化学品领域的有机合成的中间体。
    • 89. 发明授权
    • Toluene diamine from non-washed dinitrotoluene
    • 来自未洗涤二硝基甲苯的甲苯二胺
    • US4224249A
    • 1980-09-23
    • US38976
    • 1979-05-14
    • Nance D. KunzThomas A. JohnsonBarton Milligan
    • Nance D. KunzThomas A. JohnsonBarton Milligan
    • C07B61/00B01J29/00C07C67/00C07C209/00C07C209/36C07C211/51C07C85/11C07C85/26
    • C07C209/36
    • This invention relates to an improvement in a process for preparing toluene diamine. The improvement resides in a process which is capable of permitting reduction of dinitrotoluene to toluene diamine without prior alkaline treatment for removal of nitrocresols in the dinitrotoluene. In carrying out the improvement the feed dinitrotoluene is water washed to remove HNO.sub.3 to a level below 6000 ppm, and the catalytic conversion of dinitrotoluene to toluene diamine is done continuously. Dinitrotoluene is charged to a reaction vessel containing a liquid carrier and reduced with hydrogen at constant pressure, the dinitrotoluene being added at a rate to maintain a concentration of dinitrotoluene of 0.0001 to 25% by weight of the total reactor contents while the hydrogenation catalyst is maintained at a level from about 0.1 to 3% based on the weight of reactor contents.
    • 本发明涉及一种制备甲苯二胺的方法的改进。 改进之处在于能够允许将二硝基甲苯还原成甲苯二胺而不经过碱性处理除去二硝基甲苯中的硝基甲酚。 在进行改进时,将进料二硝基甲苯进行水洗以除去HNO 3至低于6000ppm的水平,并连续进行二硝基甲苯向甲苯二胺的催化转化。 将二硝基甲苯加入到含有液体载体的反应容器中并在恒定压力下用氢气还原,二硝基甲苯的加入速率使二硝基甲苯的浓度保持在总反应器内容物的0.0001至25重量%,同时保持氢化催化剂 基于反应器内容物的重量为约0.1至3%的水平。
    • 90. 发明授权
    • Hydrogenation of mixed aromatic nitrobodies
    • 混合芳族硝基的氢化
    • US4185036A
    • 1980-01-22
    • US837633
    • 1977-09-28
    • Karl F. Cossaboon
    • Karl F. Cossaboon
    • B01J23/40B01J23/64B01J23/652B01J23/89C07C209/36C07C85/11
    • C07C209/36B01J23/40B01J23/64B01J23/6522B01J23/89
    • Process, batch or continuous, for hydrogenating a mixture of an aromatic mononitro-non-amino compound and an aromatic dinitro and/or an aromatic mononitromonoamino compound, which process comprises reacting hydrogen and a homogeneous or heterogeneous liquid mixture of at least 25 weight % of an aromatic mononitro-non-amino compound and at least 25 weight % of at least one compound selected from aromatic dinitro compounds and aromatic mononitromonoamino compounds, for example, a 25:75 weight % mixture of p-nitroaniline and o-nitrotoluene, with vigorous mixing, in the presence of 0.05-1.0 weight % of an hydrogenation catalyst derived from a metal of Group VIII of the Periodic Chart of the Elements, at a temperature of 75.degree.-225.degree. C. and a pressure of 50-800 p.s.i.g.
    • 用于氢化芳族单硝基非氨基化合物和芳族二硝基和/或芳香族单硝基氨基化合物的混合物的方法,分批或连续方法,该方法包括使氢和均相或非均相液体混合物与至少25重量% 芳族单硝基非氨基化合物和至少25重量%的至少一种选自芳族二硝基化合物和芳族单硝基氨基化合物的化合物,例如,对硝基苯胺和邻硝基甲苯的25:75重量%混合物,具有剧烈的 在0.05〜1.0重量%的衍生自元素周期表第Ⅷ族金属的氢化催化剂的存在下,在75〜-225℃的温度和50-800psig的压力下,