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20 条记录 (耗时 0.021 秒)

    Process for producing methyl methacrylate
    5.
    发明授权
    Process for producing methyl methacrylate 失效
    生产甲基丙烯酸甲酯的方法

    公开(公告)号：US5087736A

    公开(公告)日：1992-02-11

    申请号：US530089

    申请日：1990-05-29

    申请人： Hirofumi Higuchi ,  Koichi Kida

    发明人： Hirofumi Higuchi ,  Koichi Kida

    IPC分类号： C07C67/317 ,  C07C67/20 ,  C07C67/327 ,  C07C69/54

    CPC分类号： C07C67/20 ,  C07C67/327

    摘要： Disclosed is a process for producing methyl methacrylate which comprises:(I) a step of reacting acetone and prussic acid to form acetonecyanhydrin;(II) a step of hydrating the acetonecyanhydrin obtained in the step (I) to form .alpha.-hydroxyisobutyric acid amide;(III) a step of reacting the .alpha.-hydroxyisobutyric acid amide obtained in the step (II) which methyl formate to form methyl .alpha.-hydroxyisobutyrate and formamide;(IV) a step of dehydrating the methyl .alpha.-hydroxyisobutyrate obtained in the step (III) to form methyl methancrylate; and(V) a step of decomposing the formamide obtained in the step (IV) into ammonia and carbon monoxide.The process can produce methyl methacrylate at high yields without by-production of acidic ammonium sulfate.

    Method for preparing alkylbenzoic acid
    6.
    发明授权
    Method for preparing alkylbenzoic acid 失效
    制备烷基苯甲酸的方法

    公开(公告)号：US5731466A

    公开(公告)日：1998-03-24

    申请号：US732606

    申请日：1996-10-16

    申请人： Koichi Kida

    发明人： Koichi Kida

    IPC分类号： C07C51/265 ,  C07C51/44 ,  C07C51/16

    CPC分类号： C07C51/265 ,  C07C51/44

    摘要： A method for preparing an alkylbenzoic acid is herein disclosed which comprises subjecting an alkylbenzene having at least two alkyl groups of 1 to 3 carbon atoms to a liquid phase oxidative reaction with a molecular oxygen-containing gas in the presence of a soluble heavy metal catalyst to convert one alkyl group into a carboxylic acid, thereby preparing the alkylbenzoic acid, and impurities contained in the alkylbenzene recovered from the reaction solution are removed therefrom by distillation, water washing, alkali washing, a treatment with an anion exchange resin or a treatment with a solid adsorbent, and the impurities-free fraction is reused as a raw material. Furthermore, the conversion of the desired product is regulated to 25% or less in the liquid phase oxidative reaction, whereby the reaction is carried out in a boiling heat removal state and reaction heat is removed as the heat of vaporization. Thus, there can be decreased a dicarboxylic acid secondarily produced during the manufacture of the alkyl-benzoic acid which is a monocarboxylic acid by subjecting the alkylbenzene to the liquid phase oxidation, whereby problems such as the trouble of equipment operation and the deterioration of product quality can be solved.

    摘要翻译： 本文公开了一种制备烷基苯甲酸的方法，其包括在可溶性重金属催化剂存在下使具有至少两个具有1至3个碳原子的烷基的烷基苯与含分子氧的气体进行液相氧化反应， 将一个烷基转化成羧酸，从而制备烷基苯甲酸，通过蒸馏，水洗，碱洗，阴离子交换树脂处理或用阴离子交换树脂处理从反应溶液中回收的烷基苯中所含的杂质被除去 固体吸附剂，无杂质馏分作为原料重复使用。 此外，在液相氧化反应中，所需产物的转化率调节至25％以下，由此在沸腾除热状态下进行反应，作为蒸发热除去反应热。 因此，通过使烷基苯进行液相氧化，可以减少在制备作为单羧酸的烷基 - 苯甲酸时二次生成的二羧酸，从而存在设备操作困难和产品质量恶化等问题 可以解决

    Process for the production of tertiary olefin
    9.
    发明授权
    Process for the production of tertiary olefin 失效
    生产叔烯烃的方法

    公开(公告)号：US4536605A

    公开(公告)日：1985-08-20

    申请号：US371424

    申请日：1982-04-23

    申请人： Koichi Kida ,  Yoshio Kawai ,  Yutaka Tamura ,  Yoshiharu Suzuki

    发明人： Koichi Kida ,  Yoshio Kawai ,  Yutaka Tamura ,  Yoshiharu Suzuki

    IPC分类号： B01J21/12 ,  C07C1/20 ,  C07C1/00

    CPC分类号： B01J21/12 ,  C07C1/20 ,  C07C2521/12

    摘要： A tertiary olefin is produced by contacting a gaseous tertiary ether usually represented by the following general formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 are alkyl groups each having 1-4 carbon atoms which may be same or different and R.sup.4 is an alkyl group having 1-3 carbon atoms, with a catalyst obtained by calcining a silica-alumina compound at 700.degree.-1100.degree. C. in order to effect cracking of the tertiary ether. This reaction may be carried out in the presence of steam to result in further improvements.

    摘要翻译： 通过与通常由以下通式表示的气态叔醚接触来制备叔烯烃：其中R 1，R 2和R 3是可以相同或不同的1-4个碳原子的烷基，R 4是烷基 具有1-3个碳原子，与通过在700℃-1100℃煅烧二氧化硅 - 氧化铝化合物而获得的催化剂以实现叔乙醚的裂化。 该反应可以在蒸汽存在下进行，以进一步改进。