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11.发明授权Process for the preparation of coated granular sodium percarbonate, and product obtainable by the process 有权涂覆颗粒状过碳酸钠的制备方法以及通过该方法得到的产物公开(公告)号：US07241433B2
公开(公告)日：2007-07-10
申请号：US10223351
申请日：2002-08-20
Applicant: Harald Jakob , Waldemar Hessberger , Juergen Lattich , Ralph Overdick
Inventor： Harald Jakob , Waldemar Hessberger , Juergen Lattich , Ralph Overdick
CPC classification number: C01B15/103 , C01B15/106
Abstract: The invention relates to a process for the preparation of coated granular sodium percarbonate having a low TAM value. The preparation is carried out by fluidized-bed spray granulation at a temperature TG in the range from 45 to 75° C., and the coating is effected by the spray application of an aqueous solution containing at least one coating component in a fluidized bed at a temperature TU in the range from 35 to 100° C. According to the invention, a) after the fluidized-bed spray granulation but before the coating, drying is carried out at TNT of greater than TG, or b) the fluidized-bed granulation is carried out in at least two steps at TG1, TG2 . . . TGn, TG2 or TGn being higher than TG1, and drying being unnecessary if ⅔ of the granulate have been formed at TG1, or c) drying takes place not after the granulation but after the coating, at TUNT, TUNT being at least 20° C. higher than TG.
Abstract translation: 本发明涉及一种制备具有低TAM值的涂层粒状过碳酸钠的方法。 该制备通过流化床喷雾造粒在45至75℃的温度下进行，并且涂层通过喷雾施加至少含有至少 在流化床中的一种涂层组分，温度为T 35℃，范围为35-100℃。根据本发明，a）在流化床喷雾造粒之后但在涂覆之前，干燥 在T T T T T下进行，大于T G G，或者b）流化床造粒在T G1期至少两个步骤进行 >，T2 。 。 。 T N G N，T G 2，或T N G N，高于T G 1，并且如果2 / 3的颗粒已经在T 1 G形成，或c）干燥发生不是在造粒之后而是在涂覆之后，在T UNT，T UNT 比T G高至少20℃。
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公开(公告)号：US06239095B1
公开(公告)日：2001-05-29
申请号：US09348008
申请日：1999-07-06
Applicant: Birgit Bertsch-Frank , Martin Bewersdorf , Lothar Kaiser , Rainer Kohlen , Ralph Overdick , Michael Scheibe
Inventor： Birgit Bertsch-Frank , Martin Bewersdorf , Lothar Kaiser , Rainer Kohlen , Ralph Overdick , Michael Scheibe
IPC: C11D300
CPC classification number: C01B15/005 , B01J2/16 , C01B15/106
Abstract: A process for the preparation of coated peroxygen compounds, in particular sodium percarbonate, by fluidized bed coating. By using a fluidized bed reactor with a radial inflow base, the passage openings of which allow the fluidized bed gas to emerge in the region of the opening at an angle of less than 35°, measured with respect to the horizontal, in the form of directed part streams, and in which are arranged spray nozzles, the pulse of which points in the same direction as the pulse of the fluidizing gas, it is possible to obtain products with an increased active oxygen stability. A circular reactor, the inflow base of which has lamellae overlapping like turbine blades and nozzles aligned in the direction of rotation of the fluidized bed is preferred.
Abstract translation: 一种通过流化床涂层制备涂层过氧化合物，特别是过碳酸钠的方法。 通过使用具有径向流入基底的流化床反应器，其通道开口允许流化床气体以相对于水平方向测量的小于35°的角度以开口的区域出现，其形式为 定向部件流，其中布置有喷嘴，其脉冲指向与流化气体的脉冲相同的方向，可以获得具有增加的活性氧稳定性的产物。 圆形反应器，其流入基座具有如涡轮叶片重叠的薄片和沿流化床的旋转方向排列的喷嘴。
