会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 5. 发明申请
    • Method for the production of 2,2'-dihydroxybiphenyls
    • 2,2'-二羟基联苯的制备方法
    • US20070129578A1
    • 2007-06-07
    • US10576694
    • 2004-10-21
    • Ralf WidmaierBettina MullerMarianna Pierobon
    • Ralf WidmaierBettina MullerMarianna Pierobon
    • C07C39/12
    • C07C37/11C07C39/15
    • A process for the preparation of a 2,2′-dihydroxybiphenyl by oxidative coupling of two phenyl molecules which have a hydrogen atom in an o-position by means of a peroxide in the presence of water at from 0 to 100° C., wherein the preparation is carried out in the presence of a water-insoluble polymer comprising a) from 0 to less than 100% by weight of a vinyl heterocycle b) from 0 to 10% by weight of a difunctional crosslinking component c) from 0 to less than 100% by weight of styrene or of a monounsaturated styrene derivative or a mixture thereof d) from 0 to 100% by weight of a N-vinylamide of an aliphatic carboxylic acid, or the monomers obtained by hydrolysis of said amido group e) from 0 to 100% by weight of a vinylcarboxylic acid or the esters, amides or salts thereof, or the monomers obtained by hydrolysis of said amido group or ester group, with the proviso that the content of compound d) or e), or d) and e), is more than 0% by weight.
    • 通过在0〜100℃的水存在下,借助于过氧化物,在两个位置上具有氢原子的两个苯基分子的氧化偶合来制备2,2'-二羟基联苯的方法,其中 该制备在水不溶性聚合物的存在下进行,该水不溶性聚合物包含a)0至小于100重量%的乙烯基杂环b)0至10重量%的双官能交联组分c)0至少 100重量%的苯乙烯或单不饱和的苯乙烯衍生物或其混合物; d)0-100重量%的脂族羧酸的N-乙烯基酰胺,或通过所述酰氨基的水解获得的单体e) 0至100重量%的乙烯基羧酸或其酯,酰胺或盐,或通过水解所述酰胺基或酯基获得的单体,条件是化合物d)或e)的含量,或d) 和e)大于0重量%。