Process for the preparation of dimethylketene and then of polydimethylketene fro isobutyric anhydride
    12.
    发明申请
    Process for the preparation of dimethylketene and then of polydimethylketene fro isobutyric anhydride 失效
    制备二甲基烯酮,然后由异丁酸酐制备聚二甲基乙烯酮的方法

    公开(公告)号:US20060270878A1

    公开(公告)日:2006-11-30

    申请号:US10545977

    申请日:2004-02-20

    申请人: Serge Hub

    发明人: Serge Hub

    IPC分类号: C07C45/87

    CPC分类号: C08F16/36 C07C45/89 C07C49/88

    摘要: The present invention relates to a process for the preparation of dimethylketene (DMK) and then of polydimethylketene (PDMK) by polymerization of DMK. More specifically, the DMK is obtained by pyrolysis by isobutyric anhydride (IBAN), the latter decomposing under the effect of heat (pyrolysis) to give isobutyric acid (IBA) and DMK. One mole of pyrolyzed IBAN gives one mole of IBA and one mole of DMK.

    摘要翻译: 本发明涉及通过DMK的聚合制备二甲基烯酮(DMK),然后制备聚二甲基烯酮(PDMK)的方法。 更具体地说,DMK是通过异丁酸酐(IBAN)的热解得到的,后者在热(热解)的作用下分解,得到异丁酸(IBA)和DMK。 1摩尔热解的IBAN得到1摩尔IBA和1摩尔DMK。

    Process for the manufacture of alkyl ketene dimers by dimerization with
tertiary amines
    13.
    发明授权
    Process for the manufacture of alkyl ketene dimers by dimerization with tertiary amines 失效
    通过与叔胺二聚生产烷基烯酮二聚体的方法

    公开(公告)号:US5525738A

    公开(公告)日:1996-06-11

    申请号:US217590

    申请日:1994-03-24

    申请人: Jian J. Zhang

    发明人: Jian J. Zhang

    CPC分类号: C07C49/88 C07C45/89

    摘要: A process is disclosed for the synthesis of alkyl ketene dimers by the dehydrohalogenation of a C.sub.8 -C.sub.22 saturated or unsaturated linear fatty acid halide, comprising reacting the fatty acid chloride with a cyclic tertiary amine in a solvent that is selected from the group consisting of cycloalkanes and alkanes at a temperature of up to 75.degree., mechanically separating tertiary amine hydrochloride salts from alkyl ketene dimer dissolved in the solvent, and recovering the alkyl ketene dimer from the solvent.

    摘要翻译: 公开了通过C8-C22饱和或不饱和直链脂肪酰卤的脱卤化氢合成烷基烯酮二聚体的方法,包括使脂肪酰氯与环状叔胺在选自环烷烃的溶剂中反应 和烷烃在高达75℃的温度下,将叔胺盐酸盐与溶解在溶剂中的烷基烯酮二聚体机械分离,并从溶剂中回收烷基烯酮二聚体。

    Preparation of fluorocarbonyl compounds
    15.
    发明授权
    Preparation of fluorocarbonyl compounds 失效
    氟羰基化合物的制备

    公开(公告)号:US4357282A

    公开(公告)日:1982-11-02

    申请号:US250134

    申请日:1981-04-03

    摘要: Fluorinated carbonyl compounds are prepared by contacting a fluorinated methyl or ethyl ether containing at least one methoxylated carbon atom-containing group selected from: --CF.sub.2 OR.sup.3, .dbd.CFOR.sup.3, ##STR1## wherein R.sup.3 is CH.sub.3 or C.sub.2 H.sub.5, with a catalyst selected from:SbX.sub.5, TaX.sub.5, NbX.sub.5, AsX.sub.5, BiX.sub.5, TiX.sub.4, ZrX.sub.4, HfX.sub.4, FeX.sub.3,mixtures of SbX.sub.3 and SbX.sub.5, ZM'X'.sub.6, and mixtures of ZM'X'.sub.6 and M'X.sub.5 where X, independently, is F, Cl, Br or I, X' is F or Cl; and Z is H, NO, O.sub.2, alkali metal or NY.sub.4 where Y, independently, is H or alkyl of 1 to 6 carbon atoms, and M' is Sb or As at a temperature of -20.degree. to 200.degree. C.

    摘要翻译: 氟化羰基化合物通过使含有至少一个选自以下的含有甲氧基化碳原子的基团的氟化甲基或乙醚与选自以下的催化剂接触:其中R 3为CH 3或C 2 H 5,其中R 3为CH 3或C 2 H 5, TaX5,NbX5,AsX5,BiX5,TiX4,ZrX4,HfX4,FeX3,SbX3和SbX5的混合物,ZM'X'6以及ZM'X'6和M'X5的混合物,其中X独立地为F,Cl, Br或I,X'是F或Cl; Z为H,NO,O 2,碱金属或NY 4,其中Y独立地为H或1至6个碳原子的烷基,M'为Sb或As,温度为-20至200℃。

    Process for producing fluorene or its derivatives
    20.
    发明授权
    Process for producing fluorene or its derivatives 失效
    芴或其衍生物的制备方法

    公开(公告)号:US6037501A

    公开(公告)日:2000-03-14

    申请号:US68609

    申请日:1998-06-06

    摘要: By subjecting an aromatic compound of the formula (I), which is an inexpensive raw material, to a vapor-phase intramolecular cyclodehydrogenation reaction, fluorenes of the formula (II) can be obtained industrially advantageously in a high yield. Fluorenes (II) are expected to be used as raw materials for heat-resistant epoxy resins, polycarbonates or polyesters. wherein R.sub.1 and R.sub.2 each represent a hydrogen atom, a methyl group or an ethyl group, or R.sub.1 and R.sub.2 represent .dbd.O at the same time; and R and R' each represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms or an alkoxy group having 1 to 4 carbon atoms.

    摘要翻译: PCT No.PCT / JP96 / 03232 Sec。 371日期:1988年5月6日 102(e)日期1998年5月6日PCT提交1996年11月5日PCT公布。 出版物WO97 / 17311 PCT 日期1997年5月15日将廉价原料的式(I)的芳香族化合物进行气相分子内环化氢化反应,可以在工业上有利地以高收率得到式(II)的芴。 芴(II)预计将用作耐热环氧树脂,聚碳酸酯或聚酯的原料。 其中R1和R2各自表示氢原子,甲基或乙基,或R1和R2同时代表= O; R和R'各自表示氢原子,碳原子数1〜4的烷基或碳原子数1〜4的烷氧基。