公开(公告)号：SK133693A3

公开(公告)日：1994-06-08

申请号：SK133693

申请日：1993-11-29

Applicant: DEGUSSA

Inventor： RIEMENSCHNEIDER HERBERT ,  ALT CHRISTIAN ,  CLAUS MARTIN ,  LOROSCH JURGEN ,  LEUTNER JOSEF ,  MONCH HEINZ

IPC: B01J2/04 ,  B01J2/16 ,  C01C3/10

Abstract: The invention relates to new alkali cyanide granules based on sodium cyanide or potassium cyanide and also a process for the preparation thereof. Commercial alkali cyanide granules comprise irregular particles: disadvantages are, in particular, the tendency to form dust and lumps. Alkali cyanide granules of the invention have practically no abrasion and a reduced tendency to form lumps. The granules are characterised by essentially spherical particles, particle diameters in the range from 0.1 to 20 mm, a bulk density above 600 g/dm , an abrasion of less than 1% and a caking index of at most 4. The granules can be prepared by fluidised-bed spray granulation, by an aqueous solution containing an alkali cyanide being sprayed on alkali cyanide nuclei in a fluidised bed and water being evaporated.

公开(公告)号：AU668778B2

公开(公告)日：1996-05-16

申请号：AU5215293

申请日：1993-12-03

Applicant: DEGUSSA

Inventor： RIEMENSCHNEIDER HERBERT ,  ALT CHRISTIAN ,  CLAUS MARTINA ,  LOROSCH JURGEN ,  LEUTNER JOSEF ,  MONCH HEINZ

IPC: B01J2/04 ,  B01J2/16 ,  C01C3/10

Abstract: The invention relates to new alkali cyanide granules based on sodium cyanide or potassium cyanide and also a process for the preparation thereof. Commercial alkali cyanide granules comprise irregular particles: disadvantages are, in particular, the tendency to form dust and lumps. Alkali cyanide granules of the invention have practically no abrasion and a reduced tendency to form lumps. The granules are characterised by essentially spherical particles, particle diameters in the range from 0.1 to 20 mm, a bulk density above 600 g/dm , an abrasion of less than 1% and a caking index of at most 4. The granules can be prepared by fluidised-bed spray granulation, by an aqueous solution containing an alkali cyanide being sprayed on alkali cyanide nuclei in a fluidised bed and water being evaporated.