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59 条记录 (耗时 0.021 秒)

    Process for producing substituted or unsubstituted naphthalic acids and acid anhydrides thereof
    1.
    发明授权
    Process for producing substituted or unsubstituted naphthalic acids and acid anhydrides thereof 失效
    制备取代或未取代的萘二甲酸及其酸酐的方法

    公开(公告)号：US4212813A

    公开(公告)日：1980-07-15

    申请号：US950407

    申请日：1978-10-11

    申请人： Ryoichi Hasegawa

    发明人： Ryoichi Hasegawa

    IPC分类号： C07C51/31 ,  C07C205/57 ,  C07B3/00

    CPC分类号： C07C205/57 ,  C07C201/12 ,  C07C51/313 ,  C07C51/56 ,  C07D307/92

    摘要： Process for producing substituted or unsubstituted naphthalic acids and acid anhydrides thereof by oxidation of corresponding acenaphthenes whose naphthalene nucleus may have one or two substituents from the group consisting of halogens, sulfonic acid groups, sulfonate groups, and nitro. The oxidation is performed at 30.degree.-150.degree. C. using molecular oxygen in the presence of (1) at least one heavy metal compound, such as cobalt acetate or manganese acetate, in an amount of 0.005-0.3 mole per mole of said acenaphthenes or a mixture of heavy metal compounds in that amount and a bromine compound in the range of 5.times.10.sup.-5 to 2.times.10.sup.-1 mole/liter of reaction solution as a catalyst and (2) at least one accelerator selected from the group consisting of lower fatty acid anhydrides, ketones and aldehydes, whereby side reactions such as condensation can be suppressed to a satisfactory extent, thereby leading to an improvement in yield of final product. A subsequent treatment of the oxidation product obtained by this process with peroxides, hypohalogenates, or molecular oxygen results in a higher yield.

    摘要翻译： 通过氧化相应的苊的方法制备取代或未取代的萘二甲酸及其酸酐，其萘核可以具有一个或两个来自卤素，磺酸基，磺酸酯基和硝基的取代基。 在（1）至少一种重金属化合物如乙酸钴或乙酸锰存在下，使用分子氧在30-150℃进行氧化，其量为每摩尔所述苊的0.005-0.3摩尔 或这种量的重金属化合物的混合物和作为催化剂的反应溶液的5×10 -5至2×10 -1摩尔/升范围内的溴化合物和（2）至少一种选自低脂肪 酸酐，酮和醛，由此可以将缩合的副反应抑制到令人满意的程度，从而导致最终产物的收率提高。 用过氧化物，次卤酸盐或分子氧随后处理通过该方法获得的氧化产物导致更高的产率。

    Process of oxidizing hydrocarbons using catalysts with high heat conductivity
    2.
    发明授权
    Process of oxidizing hydrocarbons using catalysts with high heat conductivity 失效
    使用高导热性催化剂氧化烃类的方法

    公开(公告)号：US4062872A

    公开(公告)日：1977-12-13

    申请号：US689248

    申请日：1976-05-24

    申请人： Sandy Y. Lew ,  Edward F. Conley

    发明人： Sandy Y. Lew ,  Edward F. Conley

    IPC分类号： B01J23/22 ,  B01J35/06 ,  B01J37/00 ,  C07C51/31 ,  C07D307/89 ,  C07B3/00

    CPC分类号： B01J37/0009 ,  B01J23/22 ,  B01J35/06 ,  C07C51/313

    摘要： An improved catalyst structure for use in catalytic processes, consisting of a powdered catalyst, carrier, and metal fiber thoroughly mixed to assure a permanent uniform distribution of the metal fiber, the catalyst-metal fiber mixture then pressed into any desired shape for its intended use. The permanent uniform dispersion of metal fibers results in a catalyst structure having increased thermal conductivity and more uniform porosity, the improved heat transfer characteristics increasing selectivity and minimizing temperature gradients in the catalytic structure thereby assuring constant reactor temperature and imparting stability, improved yield and temperature control in highly exothermic and endothermic catalytic reactions.

    摘要翻译： 用于催化方法的改进的催化剂结构，由粉末状催化剂，载体和金属纤维组成，充分混合以确保金属纤维的永久均匀分布，然后将催化剂 - 金属纤维混合物压制成任何所需形状用于其预期用途 。 金属纤维的永久均匀分散导致具有增加的导热性和更均匀的孔隙率的催化剂结构，改进的传热特性增加了催化结构中的选择性和最小化温度梯度，从而确保恒定的反应器温度并赋予稳定性，提高的产率和温度控制 在高度放热和吸热催化反应中。

    Citric acid and citramalic acid preparation
    9.
    发明授权
    Citric acid and citramalic acid preparation 失效
    柠檬酸和柠檬酸制备

    公开(公告)号：US4022823A

    公开(公告)日：1977-05-10

    申请号：US680396

    申请日：1976-04-26

    申请人： John B. Wilkes ,  Robert G. Wall

    发明人： John B. Wilkes ,  Robert G. Wall

    IPC分类号： C07C51/27 ,  C07B3/00

    CPC分类号： C07C51/27

    摘要： A process for the preparation of citric acid which comprises contacting an unsaturated compound selected from 3-methylene-1,5-pentanediol and its esters with a nitric acid solution in an amount of 2 to 50 mols of nitric acid feed per mol of unsaturated compound feed, and at least 0.005 mol percent nitrogen dioxide based on nitric acid, at a temperature between -10.degree. and 120.degree. C., to thereby oxidize said unsaturated compound to citric acid. Preferably the contacting of the unsaturated compound so as to synthesize citric acid is carried out in the absence of any substantial amount of vanadium as the presence of vanadium catalysts has been found to effectively prevent the recovery of good yields of citric acid from the process.The citric acid synthesis preferably is carried out by an overall process wherein isobutene is reacted with two mols of formaldehyde to produce 3-methylene-1,5-pentanediol, which is then converted to citric acid by reaction with nitrogen dioxide/nitric acid.Citramalic production from 3-methyl-3-buten-1-ol is also disclosed.

    摘要翻译： 一种制备柠檬酸的方法，其包括使选自3-亚甲基-1,5-戊二醇及其酯的不饱和化合物与硝酸溶液相接触，硝酸溶液的量为每摩尔不饱和化合物2至50摩尔硝酸进料 在-10℃〜120℃的温度下进料至少0.005mol％的基于硝酸的二氧化氮，从而将所述不饱和化合物氧化成柠檬酸。 优选地，不饱和化合物的合成柠檬酸的接触在不存在任何显着量的钒的情况下进行，因为已经发现钒催化剂的存在有效地防止了柠檬酸从该过程中回收良好的产率。

    Nitro or nitroso aromatic composition
    10.
    发明授权
    Nitro or nitroso aromatic composition 失效
    NITRO或NITROSO芳香组合物

    公开(公告)号：US3696046A

    公开(公告)日：1972-10-03

    申请号：US3696046D

    申请日：1970-08-20

    申请人： DONALD M FENTON

    发明人： FENTON DONALD M

    IPC分类号： C07B35/04 ,  C07B3/00 ,  C07C79/10

    CPC分类号： C07B35/04

    摘要： THE OXIDATION OF ORGANIC COMPOUNDS USING A NITRO OR NITROSO AROMATIC AS AN OXIDANT IN THE PRESENCE OF A NON-AQUEOUS REACTION MEDIUM CONTAINING A RUTHENIUM OR RHENIUM CATALYST AND ALKALINE CONDITIONS IS DISCLOSED. PREFERABLY, THE CATALYTICALLY ACTIVE METAL IS IN COMPLEX ASSOCIATION WITH A BIPHYLLIC LIGAND. EXAMPLES OF OXIDIZABLE SUBSTRATES ARE ARYL AND ALKYL SUBSTITUTED AROMATICS; CONDENSED RING AROMATICS; PHENOLS; OLEFINS; ALKYNES; SATURATED HYDROCARBYL ALCOHOLS, KETONES, ALDEHYDES, HALIDES, ETHERS, AMINES AND CARBOXYLIC ACIDS AND HALIDES AND ALKYL ESTERS THEREOF; AND HETEROCYCLIC AMINES. THE OXIDATION IS PERFORMED UNDER RELATIVELY MILD CONDITIONS INCLUDING TEMPERATURES FROM 50* TO 350* C. AND PRESSURES FROM 0.1 TO 1000 ATMOSPHERES.