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    • 2. 发明申请
    • PROCESS FOR THE PREPARATION OF A POWDER COMPRISING ONE OR MORE DERIVATIVES OF GLYCINE-N,N DIACETIC ACID AND /OR ONE OR MORE DERIVATIVES OF GLUTAMINE-N,N DIACETIC ACID AND METHYLGLYCINE-N,N DIACETIC ACID TRISODIUM SALT POWDER
    • 制备含有GLYCINE-N,N二酸和/或一种或多种谷氨酰胺-N,N二酸和甲基甘氨酸-N,N二酸三钠盐粉末的一种或多种衍生物的粉末的制备方法
    • US20140155646A1
    • 2014-06-05
    • US14090285
    • 2013-11-26
    • BASF SE
    • Frank MrzenaHans-Juergen KinderMichael SchoenherrGerhard CoxThomas SchmidtVolker Huett
    • C07C229/24
    • C07C229/24C07B2200/13C07C227/42C07C229/16
    • A process is proposed for the preparation of a powder comprising one or more derivatives of glycine-N,N-diacetic acid and/or one or more derivatives of glutamine-N,N-diacetic acid with a degree of crystallinity of a ≧30%, starting from an aqueous solution comprising the one or more derivatives of glycine-N,N-diacetic acid and/or the one or more derivatives of glutamine-N,N-diacetic acid in a concentration range from 20 to 60% by weight, based on the total weight of the aqueous solution, where the aqueous solution is concentrated in a first process step in an evaporator with rotating internals, which are arranged at a distance relative to the inside wall of the evaporator of ≦1% of the diameter of the evaporator, to give a crystal slurry with a solids concentration in the range from 60 to 85% by weight, based on the total weight of the crystal slurry, and where in a second process step the crystal slurry is left to ripen in a paste bunker and then in a thin-film contact dryer, and where the residence time in the paste bunker and in the thin-film contact dryer is in total a ≧15 minutes.
    • 提出一种制备包含一种或多种甘氨酸-N,N-二乙酸衍生物和/或一种或多种结晶度为≥30%的谷氨酰胺-N,N-二乙酸衍生物的粉末的方法, 从包含甘氨酸-N,N-二乙酸的一种或多种衍生物和/或浓度为20至60重量%的谷氨酰胺-N,N-二乙酸的一种或多种衍生物的水溶液开始, 基于水溶液的总重量,其中在具有旋转内部件的蒸发器中的第一工艺步骤中浓缩水溶液,所述蒸发器相对于蒸发器的内壁设置一定距离; 1%的直径 ,得到基于晶体浆料的总重量的固体浓度为60至85重量%的晶体浆料,并且在第二工艺步骤中,将晶体浆料在 然后在薄膜接触式干燥机中, 其中在糊状掩模和薄膜接触式干燥器中的停留时间总共为≥15分钟。