Process for the purification of thiophenes
    48.
    发明申请
    Process for the purification of thiophenes 审中-公开
    噻吩的纯化方法

    公开(公告)号:US20050065352A1

    公开(公告)日:2005-03-24

    申请号:US10942409

    申请日:2004-09-16

    摘要: The invention relates to a process for the purification of thiophenes by means of precipitation. The purified thiophenes are liquid at room temperature, have a purity of at least 99.50 wt. %, and are represented by the following general formula (I), wherein R1 and R2 independently of each other are, for example, a linear or branched C1-C20-alkyl group, or together form a fused C1-C20-dioxyalylene ring. The process involves: (I) precipitating the thiophene by cooling a solution of the thiophene and at least one solvent; or (II) precipitating the thiophene by adding the thiophene to a cooled solution of solvent and optionally the thiophene. The solutions are cooled to a temperature below the melting point of the thiophene.

    摘要翻译: 本发明涉及通过沉淀纯化噻吩的方法。 纯化的噻吩在室温下是液体,纯度至少为99.50wt。 %,并且由以下通式(I)表示,其中R 1和R 2彼此独立地是例如直链或支链C 1 -C 20 - 烷基,或一起形成稠合C1 -C 20 - 二氧杂环戊烯环。 该方法包括:(I)通过冷却噻吩和至少一种溶剂的溶液来沉淀噻吩; 或(II)通过将噻吩加入到冷却的溶剂和任选的噻吩中来沉淀噻吩。 将溶液冷却至低于噻吩的熔点的温度。

    Aqueous preparation treatment of mineral building materials
    50.
    发明授权
    Aqueous preparation treatment of mineral building materials 有权
    矿物建筑材料的水性制备处理

    公开(公告)号:US06284834B1

    公开(公告)日:2001-09-04

    申请号:US09317248

    申请日:1999-05-24

    IPC分类号: C08L8306

    摘要: The present invention relates to novel aqueous preparations for the treatment of mineral building materials containing (I) an aqueous emulsion of at least one polyfunctional carbosilane and/or carbosiloxane (A) and/or the (partial) condensation product thereof, (II) an emulsion of at least one organo(poly)siloxane (B), (III) at least one organic polymer (C) dispersible or emulsified in water, (IV) inorganic nanoparticles (D) dispersed or dispersible in water, and (V) optionally other additives (E).

    摘要翻译: 本发明涉及用于处理矿物建筑材料的新型含水制剂,其含有(I)至少一种多官能碳硅烷和/或碳硅氧烷(A)和/或其(部分)缩合产物的水乳液,(II) 至少一种有机(聚)硅氧烷(B),(III)在水中分散或乳化的至少一种有机聚合物(C)的乳液,(IV)分散或分散在水中的无机纳米颗粒(D),和 其他添加剂(E)。