Process for the catalytic oxidation of aromatic compounds
    3.
    发明授权
    Process for the catalytic oxidation of aromatic compounds 失效
    芳香族化合物的催化氧化方法

    公开(公告)号:US5616734A

    公开(公告)日:1997-04-01

    申请号:US378231

    申请日:1995-01-25

    CPC classification number: C07C46/04 C07C37/60 C07C46/06 C07C50/10

    Abstract: The invention relates to the use of compounds of the formula IR.sup.1.sub.a Re.sub.b O.sub.c (I),where a is from 1 to 6, b is from 1 to 4 and c is from 1 to 14 and the sum of a, b and c is in accordance with the valence of from 5 to 7 of the rhenium, with the proviso that c is not greater than 3.multidot.b, and where R.sup.1 is identical or different and is an aliphatic hydrocarbon radical having from 1 to 10 carbon atoms, an aromatic hydrocarbon radical having from 6 to 10 carbon atoms or an arylalkyl radical having from 7 to 9 carbon atoms, with the radicals R.sup.1 being able, if desired, to be identically or differently substituted independently of one another and, in the case of .sigma.-bonded radicals, at least one hydrogen atom still being bonded to the carbon atom in the .alpha. position, as catalysts for the oxidation of electron-rich aromatic compounds and their derivatives and to a process for the oxidation of electron-rich aromatic compounds which comprises oxidizing electron-rich C.sub.6 -C.sub.22 -aryl compounds and their derivatives in the presence of a catalyst of the formula I and a peroxide-containing compound.

    Abstract translation: 本发明涉及式Ⅰ化合物R1aRebOc(Ⅰ)的用途,其中a为1至6,b为1至4,c为1至14,a,b和c的和为 铼的价数为5至7,条件是c不大于3xb,并且其中R1相同或不同,是具有1至10个碳原子的脂族烃基,具有从 6至10个碳原子或具有7至9个碳原子的芳基烷基,如果需要,基团R1能够彼此相同或不同地取代,并且在σ-键合基团的情况下,至少 一个氢原子仍然与α位上的碳原子键合,作为用于氧化富含电子的芳族化合物及其衍生物的催化剂,以及氧化富含电子的芳族化合物的方法,其包括将富含电子的C6- C22-芳基化合物及其衍生物 在式I催化剂和含过氧化物的化合物存在下进行。

    Oxidation of organic compounds using ceric ions in aqueous
trifluoromethanesulfonic acid
    6.
    发明授权
    Oxidation of organic compounds using ceric ions in aqueous trifluoromethanesulfonic acid 失效
    在三氟甲磺酸水溶液中氧化有机化合物

    公开(公告)号:US4647349A

    公开(公告)日:1987-03-03

    申请号:US859565

    申请日:1986-05-05

    CPC classification number: C25B3/00 C07C45/30

    Abstract: A process for oxidizing aromatic and alkyl substituted aromatic compounds to carbonyl containing compounds by contacting an aromatic and alkyl aromatic compound with an aqueous solution of ceric trifluoromethanesulfonate having from at least 0.75 to 7 molar concentration of free acid of trifluoromethanesulfonic acid and at least 0.2 molar cerium ion concentration. The present process provides a highly effective means of forming the desired carbonyl containing product in good yields and high selectivity.

    Abstract translation: 通过使芳族和烷基芳族化合物与三氟甲磺酸铈的水溶液接触,使芳族和烷基取代的芳香族化合物氧化成含羰基化合物的方法,其具有至少0.75至7摩尔浓度的三氟甲磺酸游离酸和至少0.2摩尔铈 离子浓度。 本方法提供了以良好的收率和高选择性形成所需的含羰基产物的高效手段。

    Catalytic oxidation of polynuclear aromatic hydrocarbons
    8.
    发明授权
    Catalytic oxidation of polynuclear aromatic hydrocarbons 失效
    多核芳烃的催化氧化

    公开(公告)号:US4446070A

    公开(公告)日:1984-05-01

    申请号:US272414

    申请日:1981-06-10

    CPC classification number: C07C46/04

    Abstract: A process for the catalytic oxidation of polynuclear aromatic hydrocarbons in general and anthracene in particular in an oxygen-containing gas in the presence of a ceric ammonium nitrate catalyst system wherein turnover ratios are increased by: (1) use of acetic acid as solvent; (2) use of pure molecular oxygen as the oxygen-containing gas; (3) use of ammonium vanadate as a promoter; and (4) addition of acetic anhydride to react with water produced as a by-product of the oxidation reaction. By use of the filtrate, remaining after removal of anthraquinone by filtration, to catalyze the oxidation of fresh anthracene, and by addition of nitric acid to restore catalytic activity after a series of oxidation reactions, anthraquinone is produced from anthracene in a continuous system.

    Abstract translation: 在硝酸铈铵催化剂体系的存在下,通常使用多元芳香烃和蒽的催化氧化方法,特别是在含氧气体中,通过以下方式增加转化率:(1)使用乙酸作为溶剂; (2)使用纯分子氧作为含氧气体; (3)使用钒酸铵作为助剂; 和(4)加入乙酸酐与作为氧化反应的副产物产生的水反应。 通过使用滤液,通过过滤除去蒽醌后残留,催化新鲜蒽的氧化,并且通过加入硝酸以在一系列氧化反应后恢复催化活性,在连续体系中由蒽产生蒽醌。

    Process for separation of naphthoquinone and phthalic acid
    10.
    发明授权
    Process for separation of naphthoquinone and phthalic acid 失效
    分离萘醌和邻苯二甲酸的方法

    公开(公告)号:US4202828A

    公开(公告)日:1980-05-13

    申请号:US868349

    申请日:1978-01-10

    CPC classification number: C07C46/10 C07C46/04 C07C51/487

    Abstract: In a process for separation of naphthoquinone and phthalic acid from an aqueous slurry prepared by contacting a reaction mixture gas formed by a catalytic vapor phase oxidation of naphthalene with an aqueous medium, the decomposition of naphthoquinone is prevented and phthalic acid is substantially separated by adding a base to the aqueous slurry so as to neutralize only sulfuric acid component and maleic acid component without substantially neutralizing phthalic acid component and heating the aqueous slurry to dissolve phthalic acid to form a slurry of naphthoquinone in an aqueous solution of phthalic acid and extracting naphthoquinone with a solvent while preventing a crystallization of phthalic acid.A pH of the aqueous slurry is adjusted in a range of 1.2 to 2.5 before the heat dissolution of phthalic acid and the extraction of naphthoquinone.An aqueous phase obtained after the extraction of naphthoquinone is cooled to crystallize phthalic acid and then the filtrate separating from the resulting slurry is used as an aqueous medium for contacting with the reaction mixture gas, optionally after adjusting pH in a range of 1.2 to 2.5.

    Abstract translation: 在通过将通过萘的催化气相氧化形成的反应混合物气体与水性介质接触而制备的水性浆液分离萘醌和邻苯二甲酸的方法中,萘醌的分解被防止,邻苯二甲酸通过加入 以仅中和硫酸成分和马来酸成分,而基本不中和邻苯二甲酸成分,加热含水浆料溶解邻苯二甲酸,形成萘醌在邻苯二甲酸水溶液中的浆液,并用萘磺酸提取萘醌 溶剂,同时防止邻苯二甲酸的结晶。 在邻苯二甲酸的热溶解和萘醌的萃取之前,将水性浆液的pH调节在1.2〜2.5的范围内。 冷却萃取萘醌后得到的水相,使邻苯二甲酸结晶,然后将所得浆液分离出的滤液用作与反应混合物气体接触的水性介质,任选在将pH调节在1.2〜2.5的范围内后,

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