PROCESS FOR THE PREPARATION OF BARIUM SULFATE OF INCREASED FLOWABILITY AND DENSITY, SUITABLE AS A RADIO-OPAQUE COMPONENT IN RADIOGRAPHIC CONTRAST AGENTS, PRODUCT OBTAINED ACCORDING TO THIS PROCESS AND THE RADIOGRAPHIC CONTRAST AGENT PRODUCED THEREFROM

摘要

ABSTRACT OF THE DISCLOSUREBarium sulfate suitable for the preparation ofradiographic contrast agents of increased flowability anddensity is obtained by a high temperature treatment at 700 to1,200°C and preferably at 800 to 1,000°C. The barium sulfateso sintered is distinguished by a bulk density of 2.5 to3 g/ml and its aqueous suspension, containing 200 g of bariumsulfate per 100 ml, is distinguished by a viscosity of no morethan 1,000 mPas. Radiographic contrast agents containing atleast 200 g of sintered barium sulfate per 100 ml areoutstandingly suitable for the difficult double contrastvisualization of the stomach and gastric mucosa.