Preparation of aromatic carboxylic acids
    23.
    发明授权
    Preparation of aromatic carboxylic acids 失效
    芳香羧酸的制备

    公开(公告)号:US4845280A

    公开(公告)日:1989-07-04

    申请号:US179686

    申请日:1988-04-11

    IPC分类号: C07C51/10

    CPC分类号: C07C51/10

    摘要: Disclosed is a process for the production of aromatic carboxylic acids by the carbonylation of aromatic bromides in the presence of a nickel catalyst, a Bronsted base and an iodide promoter.

    摘要翻译: 公开了通过在镍催化剂,布朗斯台德碱和碘化物促进剂的存在下芳族溴化物的羰基化生产芳族羧酸的方法。

    Process for the preparation of copoly(arylene sulfide) using an
oxygen-containing gas
    25.
    发明授权
    Process for the preparation of copoly(arylene sulfide) using an oxygen-containing gas 失效
    使用含氧气体制备共聚(亚芳基硫醚)的方法

    公开(公告)号:US4826956A

    公开(公告)日:1989-05-02

    申请号:US196711

    申请日:1988-05-20

    IPC分类号: C08G75/02 C08G75/14

    CPC分类号: C08G75/14 C08G75/0263

    摘要: A process for producing a copoly(arylene sulfide) corresponding to the structure[--A--S--).sub.1-x (--A--S--S--).sub.x ].sub.nwherein A is a divalent substituted or unsubstituted aromatic radical, x is in the range of 0.5 to 0.001 and n is at least 200, comprising reacting within a reaction zone a mixture of a diiodoaromatic compound and elemental sulfur at a polymer producing temperature wherein the reaction zone contains an oxygen-containing gas flowing at a rate in the range of 0.001 to 0.08 ft3/hr/mol of oxygen per mole of sulfur.

    摘要翻译: 对应于[-AS-)1-x(-ASS-)x] n结构的共聚(亚芳基硫醚)的制备方法,其中A是二价取代或未取代的芳族基,x在0.5至0.001的范围内 并且n为至少200,包括在反应区内在聚合物生产温度下使二碘代芳族化合物和元素硫的混合物反应,其中反应区含有以0.001至0.08ft 3 / 小时/摩尔氧/摩尔硫。