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Process for the preparation of barium sulfate with increased fluidity and density suitable as a shadow producing component in X-ray contrast agents, product obtained by this process and X-ray contrast agents prepared therefrom
Process for the preparation of barium sulfate with increased fluidity and density suitable as a shadow producing component in X-ray contrast agents, product obtained by this process and X-ray contrast agents prepared therefrom
Barium sulfate suitable for the preparation of radiographic contrast agents of increased flowability and density is obtained by a high temperature treatment at 700 DEG to 1,200 DEG C. and preferably at 800 DEG to 1,000 DEG C. The barium sulfate so sintered is distinguished by a bulk density of 2.5 to 3 g/ml and its aqueous suspension, containing 200 g of barium sulfate per 100 ml, is distinguished by a viscosity of no more than 1,000 mPas. Radiographic contrast agents containing at least 200 g of sintered barium sulfate per 100 ml are outstandingly suitable for the difficult double contrast visualization of the stomach and gastric mucosa.
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机译:通过在700℃至1200℃,优选在800℃至1000℃的高温处理,获得了适于制备流动性和密度增加的放射线造影剂的硫酸钡。如此烧结的硫酸钡的特征在于体积大。密度为2.5至3 g / ml,其水悬浮液每100 ml含200 g硫酸钡,其粘度不超过1,000 mPas。每100毫升至少包含200克烧结硫酸钡的放射线造影剂非常适合胃和胃粘膜的难于双重对比显影。
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