公开(公告)号：US5674617A

公开(公告)日：1997-10-07

申请号：US570801

申请日：1995-12-12

申请人： Herbert Riemenschneider ,  Christian Alt ,  Martina Claus ,  Jurgen Lorosch ,  Josef Leutner ,  Heinz Monch

发明人： Herbert Riemenschneider ,  Christian Alt ,  Martina Claus ,  Jurgen Lorosch ,  Josef Leutner ,  Heinz Monch

IPC分类号： B01J2/04 ,  B01J2/16 ,  C01C3/10 ,  B32B5/16 ,  C01C3/08

CPC分类号： C01C3/10 ,  C01P2004/32 ,  C01P2004/50 ,  C01P2004/61 ,  C01P2006/10 ,  C01P2006/21 ,  C01P2006/80 ,  Y10T428/2982 ,  Y10T428/2991 ,  Y10T428/2993

摘要： New alkali metal cyanide granulates based on sodium cyanide or potassium cyanide and a method for their preparation are disclosed. Commercially available alkali metal cyanide granulates consist of irregular particles; disadvantages are in particular the tendencies to form dust and to cake. The disclosed alkali metal cyanide granulates demonstrate a reduced tendency to cake and virtually no abrasion. The granulates are characterized by essentially spherical particles with particle diameters in the range 0.1 to 20 mm, a bulk density of more than 600 g/dm.sup.3, an abrasion of less than 1%, and a caking index of at most 4. The granulates can be prepared by fluidized bed spray granulation involving spraying an aqueous solution containing alkali metal cyanide onto alkali metal cyanide nuclei in a fluidized bed and evaporating the water.

摘要翻译： 公开了基于氰化钠或氰化钾的新的碱金属氰化物颗粒及其制备方法。 市售的碱金属氰化物颗粒由不规则颗粒组成; 缺点尤其是形成灰尘和蛋糕的倾向。 所公开的碱金属氰化物颗粒显示出降低的滤饼倾向并且几乎没有磨损。 颗粒的特征在于粒径在0.1至20mm，堆积密度大于600g / dm 3，磨损小于1％，结块指数至多为4的基本上为球形的颗粒。颗粒可以 通过流化床喷雾造粒制备，包括在流化床中将含有碱金属氰化物的水溶液喷涂到碱金属氰化物核上并蒸发水。