METHOD FOR RECOVERY OF ORGANIC ACID FROM DILUTE AQUEOUS SOLUTION
    1.
    发明申请
    METHOD FOR RECOVERY OF ORGANIC ACID FROM DILUTE AQUEOUS SOLUTION 审中-公开
    从稀释水溶液中回收有机酸的方法

    公开(公告)号:US20130331601A1

    公开(公告)日:2013-12-12

    申请号:US13992343

    申请日:2011-12-09

    Abstract: The present invention relates to a method and an arrangement for recovery of at least one organic acid from a dilute aqueous solution thereof. In this method a complex between said organic acid and an extractant is formed by contacting the solution with a reactive extractant and dissolving the formed complex into said extractant thus forming an extractant phase. The organic acid is removed from the formed complex by esterification using an alcohol.

    Abstract translation: 本发明涉及一种从其稀水溶液中回收至少一种有机酸的方法和装置。 在该方法中,通过使溶液与反应性提取剂接触并将形成的络合物溶解在所述萃取剂中形成萃取相,形成所述有机酸和萃取剂之间的络合物。 使用醇通过酯化从形成的络合物中除去有机酸。

    GYPSUM PRODUCT AND PROCESS FOR ITS PREPARATION
    2.
    发明申请
    GYPSUM PRODUCT AND PROCESS FOR ITS PREPARATION 审中-公开
    GYPSUM产品及其制备方法

    公开(公告)号:US20100062255A1

    公开(公告)日:2010-03-11

    申请号:US12525129

    申请日:2008-02-01

    Abstract: The invention relates to a gypsum product which consists of essentially intact crystals having a size of between 0.1 and below 2.0 μm. The product is especially suitable as a coating pigment or filler in paper manufacture. The invention also relates to a process for the preparation of a gypsum product, wherein calcium sulphate hemihydrate and/or calcium sulphate anhydrite, water and a crystallization habit modifier are contacted so that the calcium sulphate hemihydrate and/or calcium sulphate anhydrite and the water are reacted with each other and form a crystalline gypsum product. The calcium sulphate hemihydrate and/or calcium sulphate anhydrite is/are used in such an amount that the reaction mixture formed from the calcium sulphate hemihydrate and/or calcium sulphate anhydrite, the water and the crystallization habit modifier has a dry matter content of between 50 and 84% by weight. Then, said gypsum product can be formed which consists of essentially intact crystals having a size of between 0.1 and below 2.0 μm.

    Abstract translation: 本发明涉及一种由基本上完整的晶体组成的石膏产品,其尺寸为0.1至小于2.0μm。 该产品特别适用于纸张制造中的涂料颜料或填料。 本发明还涉及一种制备石膏制品的方法,其中硫酸钙半水合物和/或硫酸钙无水石膏,水和结晶习性调节剂接触,使得硫酸钙半水合物和/或硫酸钙无水石膏和水是 彼此反应并形成结晶石膏产品。 硫酸钙半水合物和/或硫酸钙无水石膏的使用量使得由硫酸钙半水合物和/或硫酸钙无水石膏形成的反应混合物,水和结晶习性改性剂的干物质含量为50 和84重量%。 然后,可以形成所述石膏制品,其由尺寸为0.1至小于2.0μm的基本上完整的晶体组成。

    Method for preparing formic acid
    3.
    发明授权
    Method for preparing formic acid 失效
    制备甲酸的方法

    公开(公告)号:US06429333B1

    公开(公告)日:2002-08-06

    申请号:US09868514

    申请日:2001-06-19

    CPC classification number: C07C51/09 C07C51/47 C07C53/02

    Abstract: In a method for preparing formic acid, methyl formate is prepared with methanol as a reactant. In the method, methyl formate obtained from methanol in a reaction is fed through an ion exchange bed, in which the hydrolysis into formic acid and methanol and the separation of formic acid from methanol take place simultaneously by means of the catalytic and adsorbent properties of a solid in exchange material in the ion exchange bed

    Abstract translation: 在制备甲酸的方法中,用甲醇作为反应物制备甲酸甲酯。 在该方法中,将甲醇从反应中得到的甲酸甲酯通过离子交换床进料,其中水解成甲酸和甲醇,甲酸从甲醇中分离,通过催化和吸附性能同时进行 固体在离子交换床中的交换材料

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