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    • 10. 发明授权
    • Production of silver sulfate grains using inorganic additives
    • 使用无机添加剂生产硫酸银颗粒
    • US07931880B2
    • 2011-04-26
    • US11694582
    • 2007-03-30
    • David W. SandfordThomas N. Blanton
    • David W. SandfordThomas N. Blanton
    • C01G5/00
    • C01G5/00A61K8/19A61K2800/412A61Q11/00A61Q17/005C01P2004/61Y10T428/256
    • An aqueous precipitation process for the preparation of particles comprising primarily silver sulfate, comprising reacting an aqueous soluble silver salt and an aqueous soluble source of inorganic sulfate ion in an agitated precipitation reactor vessel and precipitating particles comprising primarily silver sulfate, wherein the reaction and precipitation are performed in the presence of an aqueous soluble inorganic additive compound containing a cation capable of forming a sulfate salt that is less soluble than silver sulfate or a halide anion or an oxyanion capable of forming a silver salt that is less soluble than silver sulfate, the amount of additive being a minor molar percentage, relative to the molar amount of silver sulfate precipitated, and effective to result in precipitation of particles comprising primarily silver sulfate having a mean grain-size of less than 70 micrometers.
    • 一种用于制备主要包含硫酸银的颗粒的水性沉淀方法,包括将水溶性银盐和无机硫酸根离子的水溶性来源在搅拌的沉淀反应器容器中反应并沉淀出主要包含硫酸银的颗粒,其中反应和沉淀是 在含有能够形成硫酸盐的阳离子的水溶性无机添加剂化合物的存在下进行,所述阳离子能够形成比硫酸银更易溶解的硫酸盐,或能够形成比硫酸银溶解度低的银盐的卤化物阴离子或氧阴离子, 的添加剂相对于沉淀的硫酸银的摩尔量是次摩尔百分比,并且有效地导致主要包含平均粒度小于70微米的硫酸银的颗粒的沉淀。