利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

185 条记录 (耗时 0.013 秒)

    Production process of 1,4,5,8-naphthalene tetracarboxylic acid
    92.
    发明公开
    Production process of 1,4,5,8-naphthalene tetracarboxylic acid 失效
    Verfahren zur Herstellung von 1,4,5,8-Naphthalintetracarbonsaure。

    公开(公告)号：EP0578369A2

    公开(公告)日：1994-01-12

    申请号：EP93304394.5

    申请日：1993-06-07

    申请人： SUMIKIN CHEMICAL CO., LTD.

    发明人： Sato, Toshio ,  Ito, Ikuo ,  Takeda, Kyoichi

    IPC分类号： C07C63/40 ,  C07C15/44 ,  C07C13/48 ,  C07C51/265 ,  C07C2/72

    CPC分类号： C07C5/367 ,  C07C2/72 ,  C07C51/265 ,  C07C2523/04 ,  C07C2531/02 ,  C07C2531/26 ,  C07C15/44 ,  C07C63/40

    摘要： There is disclosed a mass production process of 1,4,5,8-naphthalene tetracarboxylic acid with high collection efficiency. In the presence of an alkaline metallic catalyst, 1,3-butadiene was added to the ethyl radicals of ethyl-p-xylene, and cyclized to 1,4,5,8-tetramethyl-1,2,3,4-tetrahydronaphthalene which was further dehydrogenated and oxidized to obtain 1,4,5,8-naphthalene tetracarboxylic acid, so that a constant supply of inexpensive 1,4,5,8-naphthalene tetracarboxylic acid can be achieved as an intermediate raw material for dye, pigment, resins, or the like.

    摘要翻译： 公开了具有高收集效率的1,4,5,8-萘四羧酸的批量生产方法。 在碱性金属催化剂的存在下，将1,3-丁二烯加入到乙基对二甲苯的乙基中，并环化成1,4,5,8-四甲基-1,2,3,4-四氢化萘，其中 进一步脱氢和氧化得到1,4,5,8-萘四羧酸，从而可以获得不断供应廉价的1,4,5,8-萘四羧酸作为染料，颜料， 树脂等。

    Process for producing alkenylbenzene
    93.
    发明公开
    Process for producing alkenylbenzene 失效
    Verfahren zur Herstellung von ALkenylbenzolen。

    公开(公告)号：EP0547336A1

    公开(公告)日：1993-06-23

    申请号：EP92118119.4

    申请日：1992-10-22

    申请人： TEIJIN LIMITED

    发明人： Shimada, Keizo ,  Sumitani, Koji ,  Itoh, Seiji ,  Sato, Kazuhiro

    IPC分类号： C07C15/44 ,  C07C2/72 ,  B01J27/232

    CPC分类号： B01J27/232 ,  B01J23/04 ,  C07C2/72 ,  C07C2523/04 ,  C07C2527/232 ,  C07C15/44

    摘要： In a process for producing an alkenylbenzene by the reaction of an alkylbenzene having 8 or more carbon atoms and a conjugated diolefin, the improvement in which the reaction is performed in the presence of a catalyst obtained by dispersing (a) an alkali metal and (b) potassium carbonate and/or potassium hydroxide in the presence of (c) an aromatic hydrocarbon having at least a substituent with a double bond.

    摘要翻译： 在通过碳原子数为8以上的烷基苯和共轭二烯烃的反应制造烯基苯的方法中，在通过将（a）碱金属和（b）分散而得到的催化剂存在下进行反应的改进 ）碳酸钾和/或氢氧化钾在（c）至少具有双键取代基的芳族烃存在下进行。

    Production of alpha, para-dimethylstyrene
    94.
    发明公开
    Production of alpha, para-dimethylstyrene 失效
    Verfahren zur Herstellung von Alpha，Para-Dimethylstyrol。

    公开(公告)号：EP0460827A1

    公开(公告)日：1991-12-11

    申请号：EP91304600.9

    申请日：1991-05-21

    申请人： BP Chemicals Limited

    发明人： Lawrenson, Malcolm John ,  Smith, Paul Christopher J., BP Chemicals Limited

    IPC分类号： C07C15/44 ,  C07C5/333 ,  B01J23/94

    CPC分类号： B01J23/94 ,  B01J23/745 ,  C07C5/3332 ,  Y02P20/584 ,  C07C15/44

    摘要： This invention relates to a process for the production of alpha, para-dimethyl styrene by catalytic dehydrogenation of para-cymene in the substantial absence of oxygen or an oxidising gas and in the presence of steam. The catalyst used is iron oxide, Fe₃O₄. The reaction is carried out at a temperature in the range from 500 to 700°C and a pressure from 0.1 to 10 atmospheres. The product is a valuable intermediate for the manufacture of perfumes.

    摘要翻译： 本发明涉及通过在基本上没有氧气或氧化气体和蒸气存在下催化脱氢对甲基异丙苯生产α-对二甲基苯乙烯的方法。 所使用的催化剂是氧化铁，Fe 3 O 4。 反应在500-700℃的温度和0.1-10个大气压的压力下进行。 该产品是制造香水的有价值的中间体。

    Process for the synthesis and purification diisopropenylbenzene
    99.
    发明公开
    Process for the synthesis and purification diisopropenylbenzene 失效
    一种用于生产和二异丙烯基苯的纯化过程。

    公开(公告)号：EP0155223A1

    公开(公告)日：1985-09-18

    申请号：EP85630021.5

    申请日：1985-02-26

    申请人： THE GOODYEAR TIRE & RUBBER COMPANY

    发明人： Colvin, Howard Allen ,  Fiedler, Ronald David ,  Muse, Joel, Jr. ,  Smith, Donald Eugene

    IPC分类号： C07C15/44 ,  C07C5/327

    CPC分类号： C07C15/44 ,  C07C7/163

    摘要： Diisopropenylbenzene is a monomer that can be used in the preparation of many useful polymers and is also a chemical intermediate that can be employed in a number of chemical processes. Diisopropenylbenzene is normally synthesized by the dehydrogenation of diisopropylbenzene. Unfortunately in this dehydrogenation process a number of olefinic impurities are produced as by-products. This invention discloses a process for the separation of diisopropenylbenzene from these impurities and for recycling some of the impurities. In one embodiment of this invention this process comprises: (1) dehydrogenating diisopropylbenzene to form a dehydrogenation mixture containing diisopropenylbenzene and organic impurities, (2) continuously distilling said dehydrogenation mixture to separate said diisopropenylbenzene from said organic impurities in a continuous recovery column 10, (3) fully hydrogenating said organic impurities to form a mixture of regenerated diisopropylbenzene and saturated organic impurities, and (4) fractionally distilling said mixture of regenerated diisopropylbenzene and saturated organic impurities under conditions sufficient to separate said regenerated diisopropylbenzene from said saturated organic impurities. The regenerated diisopropylbenzene can then be recycled for dehydrogenation with fresh diisopropylbenzene in the first step of the above described process.

    Prevention of polymer formation in dehydrogenation of p-ethyltoluene
    100.
    发明公开
    Prevention of polymer formation in dehydrogenation of p-ethyltoluene 失效
    Verhinderung der Bildung eines Polymerisats bei de Dehydrierung vonÄthyltoluol。

    公开(公告)号：EP0035329A1

    公开(公告)日：1981-09-09

    申请号：EP81300532.9

    申请日：1981-02-10

    申请人： MOBIL OIL CORPORATION

    发明人： Chu, Chin Chiun

    IPC分类号： C07C7/20 ,  C07C15/44 ,  C07C5/333

    CPC分类号： C07C5/333 ,  C07C7/20 ,  Y10S585/95 ,  C07C15/46

    摘要： A method for the catalytic dehydrogenation of p-ethyltoluene to p-methylstyrene in which the formation of proliferous polymer in the condenser is prevented by adding minor amounts of H 2 S continuously to the gaseous product effluent entering the condenser.

    摘要翻译： 用于将对乙基甲苯催化脱氢成对甲基苯乙烯的方法，其中通过向进入冷凝器的气态产物流出物中连续加入少量的H 2 S来防止在冷凝器中形成增殖聚合物。