Process for production of hydroxygbenzoic acids
    4.
    发明申请
    Process for production of hydroxygbenzoic acids 审中-公开
    羟基苯甲酸生产方法

    公开(公告)号:US20060052632A1

    公开(公告)日:2006-03-09

    申请号:US10529899

    申请日:2003-09-30

    IPC分类号: C07C51/15

    摘要: The present invention provides a method for producing a hydroxybenzoic acid compound comprising, dehydrating a phenol compound and an alkaline metal compound to form the alkaline metal salt of the phenol compound and reacting the alkaline metal salt and carbon dioxide, wherein the dehydrating step is conducted by reacting the alkaline metal compound with an excess amount of the phenol compound at a temperature of 160° C. or above. According to the method of the present invention, the hydroxybenzoic acid compound can be obtained by simple steps with low cost without using an expensive aprotic polar organic solvent. The provided method can produce highly pure hydroxybenzoic acid compound comprising little by-products in high yield.

    摘要翻译: 本发明提供一种羟基苯甲酸化合物的制造方法,其包括使酚化合物和碱金属化合物脱水以形成酚化合物的碱金属盐,并使碱金属盐和二氧化碳反应,其中脱水步骤通过 在160℃以上的温度下使碱金属化合物与过量的酚化合物反应。 根据本发明的方法,可以通过简单的步骤以低成本获得羟基苯甲酸化合物,而不使用昂贵的非质子极性有机溶剂。 所提供的方法可以以高产率产生包含少量副产物的高纯度羟基苯甲酸化合物。

    Process for preparing 3-nitro-4-alkoxybenzoic acid
    7.
    发明申请
    Process for preparing 3-nitro-4-alkoxybenzoic acid 审中-公开
    制备3-硝基-4-烷氧基苯甲酸的方法

    公开(公告)号:US20070043235A1

    公开(公告)日:2007-02-22

    申请号:US10555347

    申请日:2004-04-27

    IPC分类号: C07C205/02

    CPC分类号: C07C201/08 C07C205/59

    摘要: The present invention provides a process for preparing 3-nitro-4-alkoxybenzoic acid, which comprises the step of subjecting a mixture comprising 4-alkoxybenzoic acid and 40-80% nitric acid, wherein the amount of the 40-80% nitric acid is equal to or more than 8 times that of 4-alkoxybenzoic acid by weight, to a reaction at a temperature of 30-100° C.

    摘要翻译: 本发明提供一种制备3-硝基-4-烷氧基苯甲酸的方法,该方法包括以下步骤:将含有4-烷氧基苯甲酸和40-80%硝酸的混合物,其中40-80%硝酸的量为 等于或大于4-烷氧基苯甲酸的8倍于在30-100℃的温度下的反应