METHOD FOR PRODUCING VITAMIN A ACETATE
    5.
    发明申请
    METHOD FOR PRODUCING VITAMIN A ACETATE 审中-公开
    维生素A的制备方法

    公开(公告)号:US20090043121A1

    公开(公告)日:2009-02-12

    申请号:US12255460

    申请日:2008-10-21

    IPC分类号: C07C69/612

    CPC分类号: C07C403/12 C07C2601/16

    摘要: The present invention relates to a process for preparing vitamin A acetate by reacting β-vinylionol with triphenylphosphine in the presence of sulfuric acid in a solvent mixture consisting of 60 to 80% by weight methanol, 10 to 20% by weight water and 10 to 20% by weight aliphatic, cyclic or aromatic hydrocarbons having 5 to 8 carbon atoms to give β-ionylideneethyltriphenylphosphonium salts and subsequent Wittig reaction with 4-acetoxy-2-methylbut-2-enal.

    摘要翻译: 本发明涉及一种制备维生素A乙酸酯的方法,该方法是在硫酸存在下,使β-乙烯醇与三苯膦反应,在60至80%(重量)甲醇,10至20%(重量)水和10至20份 重量%的具有5至8个碳原子的脂族,环状或芳族烃,得到β-离子亚乙基三苯基鏻盐,随后与4-乙酰氧基-2-甲基丁-2-烯的维t希反应。

    Method for Producing High-Purity Quaternary Ammonium Compounds
    8.
    发明申请
    Method for Producing High-Purity Quaternary Ammonium Compounds 审中-公开
    高纯度季铵化合物的制备方法

    公开(公告)号:US20080009633A1

    公开(公告)日:2008-01-10

    申请号:US11661020

    申请日:2005-08-03

    摘要: Process for preparing quaternary ammonium compounds by reacting the corresponding tertiary sp3-hybridized amine or sp2-hybridized imine with dimethyl sulfite, wherein the reaction is carried out (i) in the presence of an inorganic or organic protic acid having a pKa of from 1.8 to 14, measured at 25° C. in aqueous solution; and (ii) at a temperature of from 10 to 100° C.

    摘要翻译: 通过使相应的叔三异丙基胺或sp2-2杂化亚胺与亚硫酸二甲酯反应制备季铵化合物的方法,其中反应进行(i) 在25℃下在水溶液中测定的pK a> 1〜14的无机或有机质子酸的存在; 和(ii)在10-100℃的温度下

    METHOD OF PREPARING IONIC LIQUIDS
    9.
    发明申请
    METHOD OF PREPARING IONIC LIQUIDS 审中-公开
    制备离子液体的方法

    公开(公告)号:US20110065926A1

    公开(公告)日:2011-03-17

    申请号:US12951726

    申请日:2010-11-22

    IPC分类号: C07F5/02

    CPC分类号: C07D233/56

    摘要: In the process for preparing ionic liquids, an ionic liquid is firstly reacted with an alkoxide or with barium hydroxide and is subsequently neutralized with an acid. The ionic liquid contains a phosphonium and/or ammonium cation and an anion selected from the group consisting of halides, arylsulfonates, alkylsulfonates, sulfate, hydroxysulfate, alkylsulfates, hydrogencarbonate, carbonate. triflate and carboxylates. In this process, virtually any anions can be introduced into the ionic liquids.

    摘要翻译: 在制备离子液体的过程中,首先使离子液体与醇盐或氢氧化钡反应,随后用酸中和。 离子液体含有鏻和/或铵阳离子和选自卤化物,芳基磺酸盐,烷基磺酸盐,硫酸盐,羟基硫酸盐,烷基硫酸盐,碳酸氢盐,碳酸盐的阴离子。 三氟甲磺酸酯和羧酸盐。 在这个过程中,几乎可以将任何阴离子引入到离子液体中。

    Method of preparing ionic liquids
    10.
    发明授权
    Method of preparing ionic liquids 失效
    离子液体的制备方法

    公开(公告)号:US07858802B2

    公开(公告)日:2010-12-28

    申请号:US10587248

    申请日:2005-01-26

    IPC分类号: C07D233/58 C25B9/10 H01G9/02

    CPC分类号: C07D233/56

    摘要: In the process for preparing ionic liquids, an ionic liquid is firstly reacted with an alkoxide or with barium hydroxide and is subsequently neutralized with an acid. The ionic liquid contains a phosphonium and/or ammonium cation and an anion selected from the group consisting of halides, arylsulfonates, alkylsulfonates, sulfate, hydroxysulfate, alkylsulfates, hydrogencarbonate, carbonate. triflate and carboxylates. In this process, virtually any anions can be introduced into the ionic liquids.

    摘要翻译: 在制备离子液体的过程中,首先使离子液体与醇盐或氢氧化钡反应,随后用酸中和。 离子液体含有鏻和/或铵阳离子和选自卤化物,芳基磺酸盐,烷基磺酸盐,硫酸盐,羟基硫酸盐,烷基硫酸盐,碳酸氢盐,碳酸盐的阴离子。 三氟甲磺酸酯和羧酸盐。 在这个过程中,几乎可以将任何阴离子引入到离子液体中。