申请人:TECHNISCHE UNIVERSITAT CLAUSTHAL
公开号:US20210309674A1
公开(公告)日:2021-10-07
The invention relates to a method for producing, amongst other things, amino-acid and/or hydroxycarboxylic-acid metal chelates, a solvent-free mixture of at least one metal oxide, metal hydroxide, metal carbonate or oxalate, and the solid organic acid is subjected to intensive mechanical stress. According to the invention, this is done in that the reaction partners are introduced in particle form into a fluid stream of a fluid-bed countercurrent mill operating without grinding elements, wherein mechanical activation of at least one of the reaction partners is effected by collision processes within a reaction chamber formed in a region of the fluid stream, and a solid body reaction to form the metal chelate is triggered. The novel method operates very energy-efficiently and with a high specific yield. It leads to a product having compact particles in the small, single-digit micrometer range having a comparatively narrow particle size distribution and a large surface. The product is homogenous and very pure. Thermal loading or decomposition of the organic chelate ligands, in particular of the amino acids, is likewise avoided, as are contaminants from milling and grinding element abrasion.
该发明涉及一种制备氨基酸和/或羟基羧酸金属螯合物的方法,其中包括无溶剂的至少一种金属氧化物、金属氢氧化物、金属碳酸盐或草酸盐的混合物,以及将固体有机酸受到强烈机械应力。根据该发明,通过将反应物以颗粒形式引入无磨粒元素运行的流化床逆流磨中,其中至少一个反应物的机械活化通过在流体流动区域内形成的反应室内的碰撞过程来实现,并触发形成金属螯合物的固体体反应。这种新方法运行非常节能,并具有高特定产量。它导致产物具有在小型、个位数微米范围内的致密颗粒,具有相对较窄的颗粒大小分布和大表面。该产品是均匀且非常纯净的。同时也避免了有机螯合配体(特别是氨基酸)的热负荷或分解,以及来自磨削和磨粒元素磨损的污染物。